Back to: Human Cognition – Teacher

Background Reading

Phineas Gage: The Man Who Survived a Tamping Iron Through His Brain

On September 13, 1848, something happened to a man named Phineas Gage that would change the way scientists think about the brain forever.

Phineas was 25 years old and worked as a construction foreman for a railroad company in Vermont. That meant he was in charge of a crew laying down train tracks—and part of his job was blasting through big rocks using explosives.

To do this, Phineas used a long metal rod called a tamping iron. It was about a meter long (over 3 feet), weighed more than 5 kilograms, and had a sharp point at one end. He used it to pack gunpowder into holes drilled into rocks, pressing the powder down so it would explode in the right direction.

But on that day, something went terribly wrong.

While Phineas was tamping the powder, it exploded too soon. The blast sent the iron rod flying up through his left cheek, straight through the front of his brain, and out the top of his head. The rod flew about 12 meters before landing.

Here’s the unbelievable part: Phineas survived.

The Miracle of Phineas Gage

Not only did Phineas live through the accident, but he was awake and talking right afterward! He could describe what had happened and even walked to get help. After recovering for a few months, he was able to talk, read, and do math just like before.

At first, it seemed like the injury hadn’t changed much.

But over time, people noticed something different about him—his personality had completely changed.

Before the accident, Phineas was friendly, polite, responsible, and smart. Afterward, he became rude, stubborn, disrespectful, and had trouble sticking to plans. He even started using bad language. His friends said he was “no longer Gage.”

Because of this, he lost his job and eventually worked in different places, including driving a horse carriage and even appearing in a museum as a “human curiosity.”

Understanding the Brain: Basic Structure and Function

Even though the human brain only weighs about 3 pounds—just 2% of our body weight—it uses about 20% of the oxygen we breathe in! That means the brain is very active, even when we’re sitting still or sleeping. It’s always working hard, which is why it uses so much energy.

The brain is made up of a few major parts:

  • Cerebrum: This is the biggest part of the brain and looks kind of like a coral. It’s divided into a left side and a right side, called hemispheres. The cerebrum is what allows us to think, remember, solve problems, and do things that make humans different from other animals.

  • Cerebellum: This part is sometimes called “the little brain.” It sits underneath the cerebrum at the back of your head. Its job is to help your muscles move smoothly so you can walk, run, and move without being clumsy.

  • Brainstem: The brainstem connects the brain to the spinal cord. It controls things your body does automatically, like breathing, keeping your heart beating, and maintaining blood pressure. You don’t have to think about these actions—they happen on their own.

The Lobes of the Brain

 

The cerebrum (the big part of the brain) is divided into four parts, called lobes. Each lobe is named after the skull bone above it:

  • Frontal lobe

  • Parietal lobe

  • Temporal lobe

  • Occipital lobe

 

All of these lobes are covered by a thin outer layer called the cerebral cortex. Even though it’s only about an eighth of an inch thick, the cortex is super important. It helps us sense the world, control our movements, and think, learn, and remember.

If the folds of your cerebral cortex were spread out flat, it would cover about the same surface area as a standard school cafeteria tray.

Why the Cortex Matters

Scientists use brain scans, like fMRI, to study which parts of the brain are active. They’ve found that most brain activity happens in the cortex, showing us just how important it is for thinking and learning.

In diseases like Alzheimer’s, the cortex starts to shrink and get thinner. That’s why people with Alzheimer’s often have trouble remembering things and thinking clearly—the parts of their brain responsible for those functions are being damaged. 

Check Your Understanding

Q: What does the brain’s structure tell us about its function?
A: Different areas are specialized—like the cerebellum for movement or the occipital lobe for vision—each part plays a unique role.

Q: Why does the brain have wrinkles and folds?
A: To fit more surface area into a small space—more folds mean more neurons and more processing power.

Q: What protects the brain from injury?
A: The skull, cerebrospinal fluid, and meninges form a triple layer of defense to cushion and protect this delicate organ.

The Limbic System — Where Emotion Meets Reason

While the lobes form the outer layer of the brain, deep inside lies a smaller network of structures that connect what we feel with what we think — the limbic system. 

Deep within the brain lies a group of interconnected structures known as the limbic system. It forms a bridge between the primitive brainstem, which controls automatic survival functions, and the cerebral cortex, which governs higher reasoning and decision-making. The limbic system links emotion, memory, and motivation, helping us react to experience with both feeling and thought.

 

The amygdala acts as an emotional alarm center, rapidly evaluating situations for threat or importance and generating feelings such as fear or excitement. The hippocampus organizes and stores memories, especially those attached to strong emotions. The thalamus relays sensory information to the proper regions of the cortex, while the hypothalamus connects the brain to the body’s internal responses, regulating hunger, temperature, and hormone balance. Working together, these regions ensure that what we feel influences what we remember and how we respond.

In humans, the prefrontal cortex helps regulate the limbic system, allowing reason to guide emotion. When we pause before acting or calm ourselves after anger, the prefrontal cortex is tempering limbic impulses toward balanced behavior. This partnership between emotion and control enables empathy, moral awareness, and mature judgment—hallmarks of human cognition.

Check Your Understanding

Q: What does the limbic system connect in the brain?
A: It links deeper emotional centers with the higher thinking areas of the cerebral cortex, joining feeling with reasoning.

Q: How do the amygdala and hippocampus work together?
A: The amygdala gives emotional meaning to experiences, and the hippocampus helps turn those emotional experiences into lasting memories.

Q: What role does the prefrontal cortex play in relation to the limbic system?
A: It helps control emotional impulses from the limbic system, allowing reason and conscience to guide behavior.

How Brain Cells Work

So far, we’ve talked about the brain’s structure—what you can see with your eyes or with brain scans like fMRI. But deep inside the brain, tiny cells called neurons do all the real work. They are responsible for everything your brain does, including thinking, learning, remembering, and moving.

Neurons and Synapses

Your brain has billions of neurons, and they need to communicate with each other for your brain to work properly. They send tiny electrical messages called nerve impulses. But there’s a catch: neurons don’t actually touch. Instead, these messages have to jump across a small gap between them.

That tiny gap is called a synapse. It’s one of the most important parts of the brain. When we learn something new, our brains strengthen existing synapses and can also form new ones. This is how we build long-term memories!

Because of your experiences, the pattern of synapses in your brain is different from everyone else’s. That’s part of what makes you unique—your memories and knowledge are literally built into the shape of your brain.

What a Neuron Looks Like

Neurons have special parts:

  • The cell body is the center of the cell and holds the nucleus, which controls what the neuron does.
  • Dendrites are like branches that reach out and receive messages from other neurons.
  • The axon is like a long wire that sends messages to the next neuron.The message travels into the dendrite, moves through the cell body, and out through the axon, where it crosses a synapse to the next neuron.

Why the Brain Needs So Much Energy

Every time you move, think, remember, or even breathe, your brain sends messages through billions of neurons and synapses. This happens every second of the day. It takes a lot of energy, which is why the brain uses so much oxygen.

Inside each neuron are tiny parts called mitochondria. They turn oxygen into energy so the brain can keep working.

Check Your Understanding

Q: Why is a reflex faster than a voluntary action?
A: A reflex is processed in the spinal cord instead of waiting for the brain to process the information first. This allows the body to respond almost immediately.

Q: What roles do sensory neurons and motor neurons play in a reflex?
A: Sensory neurons carry information from receptors to the spinal cord. Motor neurons carry instructions from the spinal cord to muscles, producing a response.

Q: Why do you become aware of a reflex only after it has already happened?
A: The reflex response is produced by the spinal cord first. The brain receives the information afterward, allowing you to become aware of what happened.

 

 

Simple Information Processing: How the Brain and Body Work Together

Our brains are always busy, and one of their main jobs is to process information. That means taking in signals from the world around us, figuring out what they mean, and telling our bodies what to do. Some types of information processing—like learning a new math concept or remembering a friend’s birthday—are very complex. But some are super fast and simple, like a reflex.

Receptors: How the Nervous System Learns About the World Around You

At every moment of every day, your body is receiving information from both the environment around you and the organs inside your body. Light enters your eyes, sound waves reach your ears, and pressure, temperature, and touch constantly stimulate your skin.

The nervous system cannot respond to information unless it first detects that information. Specialized cells called receptors perform this important task. Receptors convert physical or chemical changes in the environment into electrical signals that can travel through the nervous system.

Different receptors are specialized to detect different types of stimuli:

  • Photoreceptors detect light.

  • Mechanoreceptors detect touch, pressure, vibration, and sound.

  • Thermoreceptors detect temperature.

  • Chemoreceptors detect chemicals such as odors and tastes.

  • Pain receptors detect potentially damaging stimuli.

Without receptors, the brain would have no information about either the outside world or the condition of the body itself.

Each of these senses depends on specialized receptors that detect information from the environment and send signals to the brain.

What Is a Reflex?

A reflex is an automatic response your body makes without you even thinking about it. One of the best-known reflexes is the knee-jerk reaction.

If you’ve ever been to the doctor and had your leg tapped just below the knee with a small hammer, you’ve probably seen this in action. Your leg kicks out quickly—that’s your knee-jerk reflex.

How the Knee-Jerk Reflex Works

Let’s break it down into 3 simple steps:

Input:
The doctor taps your tendon just below your knee. This causes your thigh muscle to stretch. Tiny sensors in that muscle notice the stretch and send a signal through a sensory neuron to your spinal cord.

 

Processing:
Inside the spinal cord, the message from the sensory neuron is quickly passed to a motor neuron. This step is super fast and doesn’t involve your brain!

Output:
The motor neuron sends a signal back to the same muscle that stretched. The muscle tightens, and your leg kicks out. All of this happens in about 1/20th of a second—that’s faster than the blink of an eye!

What About the Brain?

You may have noticed: the brain isn’t involved in the knee-jerk reflex. That’s why it happens so quickly. If the message had to travel all the way to the brain and back, your reaction would take much longer.

But the brain does eventually get the message. That’s how you know your knee was tapped. It just happens after your leg has already kicked.

Another Reflex: Touching a Hot Stove

The same idea happens when you accidentally touch something hot—like a stove. You pull your hand away fast, often before you even feel the pain. That’s because the reflex goes through your spinal cord, not your brain. Once your brain catches up, it understands what happened—and maybe tells you not to do that again!

What Have We Learned?

Whether it’s kicking your leg or pulling your hand back, reflexes are your body’s way of protecting you quickly. Your brain processes information too, but sometimes your spinal cord takes care of things first—so you stay safe.

Check Your Understanding

Q: What does your brain do with the flood of sights and sounds it receives every second?
A: It filters most of it out, focusing only on what seems important—this is how attention begins.

Q: Why don’t we notice everything we see or hear?
A: Because attention is limited. The brain picks what’s important and lets the rest fade to avoid overload.

Q: What’s the first step in processing information?
A: Sensory input—your brain receives signals from the environment and decides what to pay attention to.

The Brain’s Map of the Body

Although your body has a particular physical shape and size, your brain represents different body parts very differently.

The region of the cerebral cortex responsible for processing touch information is called the somatosensory cortex. Scientists have discovered that some parts of the body occupy much larger areas of this cortex than others.

The lips, tongue, and fingertips are represented by very large areas of the somatosensory cortex because they provide enormous amounts of sensory information. In contrast, the back, arms, and legs occupy much smaller areas.

The amount of brain tissue devoted to a body part depends more on the amount of information received than on the actual physical size of the body part.

The Sensory Homunculus

Scientists often represent the unequal sensory importance of body regions using a figure called the sensory homunculus.

The word homunculus means “little man.” In this illustration, body parts are drawn in sizes that reflect the amount of brain tissue devoted to processing information from those regions.

As a result, the homunculus has enormous lips, hands, and tongue, but relatively small arms, legs, and back.

Although this figure appears strange, it illustrates an important principle:

Your brain does not treat all parts of your body equally.

Some regions provide much more information to the brain and therefore receive much greater attention from the nervous system.

Two-Point Discrimination

Imagine touching your fingertip with two pencil points placed very close together. You would probably recognize that two separate points were touching your skin.

Now imagine performing the same test on your upper arm or back. Even if the points were farther apart, you might perceive only a single touch.

This difference is called two-point discrimination.

 

Body regions that contain many receptors and occupy large areas of the somatosensory cortex can distinguish between two nearby points more easily than regions with fewer receptors and smaller cortical representation.

Two-point discrimination provides evidence that the brain devotes different amounts of processing power to different parts of the body.

From Sensation to Action

Nearly everything the nervous system does follows the same basic pattern:

Receive information → Process information → Generate a response

  • Receptors detect stimuli.
  • Sensory neurons carry information toward the central nervous system.
  • The brain or spinal cord processes the information and determines an appropriate response.
  • Motor neurons carry instructions to muscles or glands, producing action.

This continuous cycle allows humans to interact with the world, maintain internal balance, avoid danger, and accomplish complex tasks.

Every thought, movement, memory, and decision begins with information entering the nervous system.

The Pupillary Light Reflex: A Window Into Your Brain

Every second of every day, your eyes are helping your brain gather information about the world around you. But your eyes also need protection. Bright sunlight, camera flashes, and headlights at night can all send large amounts of light into the eye. Fortunately, your nervous system has a built-in reflex that automatically adjusts the amount of light entering your eyes.

This reflex is called the pupillary light reflex. Physicians often test this reflex during neurological examinations because it provides information about the health of the eyes, optic nerves, and brainstem.

Light Enters the Retina

The process begins when light enters the eye and reaches the retina, the thin layer of specialized nerve cells lining the back of the eye.

The retina acts as a receptor because it detects the stimulus—in this case, light. Special cells in the retina convert light energy into electrical signals that can travel through the nervous system.

The Signal Travels to the Brain

Once the retina detects light, the electrical signal travels along the optic nerve, which carries visual information from the eye to the brain.

However, before the signal reaches the parts of the brain responsible for vision, it first stops at an important structure deep within the brain called the brainstem.

The brainstem acts as a rapid processing center for many automatic functions that help keep you alive and safe.

The Brain Sends Commands Back to the Eyes

When the brainstem detects bright light entering one eye, it immediately sends motor signals back to the muscles that control the size of the pupils.

Surprisingly, these signals are sent to both eyes, not just the eye receiving the light.

As a result, both pupils become smaller at the same time.

The pupil in the eye exposed to the light becomes smaller through the direct pupillary response.

The pupil in the opposite eye also becomes smaller through the consensual pupillary response.

Why Does This Happen?

Constriction of both pupils helps protect the delicate retina from excessive light exposure and keeps the amount of light entering each eye balanced.

This allows both eyes to continue working together to produce a clear and stable view of the world.

A Remarkable Example of Information Processing

The pupillary light reflex happens automatically and usually without your awareness.

In less than a second:

  1. The retina detects the stimulus.
  2. The optic nerve carries information to the brain.
  3. The brainstem processes the information.
  4. Motor commands travel back to the eyes.
  5. Both pupils respond together.

This simple reflex demonstrates one of the most important ideas in Human Cognition:

Your nervous system is constantly receiving information, processing it, and producing responses—often before you even realize it is happening.

 

Check Your Understanding

Q: What part of the eye acts as the receptor in the pupillary light reflex?

A: The retina acts as the receptor because it detects light entering the eye.

Q: Why do both pupils become smaller when light shines into only one eye?

A: The brainstem sends motor signals to both eyes, causing both pupils to constrict at the same time.

Q: What is the main purpose of the pupillary light reflex?

A: The reflex protects the retina from excessive light and helps maintain balanced visual input between the two eyes.

 
 

Living Between Two Worlds

Humans exist between two constantly changing worlds.

The first is the external world of sights, sounds, temperatures, objects, and other people.

The second is the internal world of heartbeat, breathing, body temperature, hunger, thirst, and countless other conditions inside the body.

The nervous system continuously monitors both worlds, integrates this information, and helps the body respond appropriately.

Life depends on this remarkable ability to sense, process, and respond to information every moment of every day.

Complex Information Processing: Learning and Memory

Your brain is always taking in and processing information from the world around you. Some of this is really fast and simple—like the knee-jerk reflex. You feel your knee was tapped only after your leg has already kicked. That’s because the signal travels through your spinal cord, not your brain.

But not all information processing is that simple. In fact, the most complex kinds of processing are things like learning and memory.

From Reflexes to Remembering

Reflexes happen automatically, but learning something new—like how to multiply fractions or understand a science experiment—takes a lot more brain power. Learning can involve any of your senses (like sight, sound, or touch) and many different parts of your brain working together.

Your teachers work hard every day to help students build skills and remember what they’ve learned. But most people, even teachers, don’t get much training in how the brain actually learns and remembers. That’s why we use something called the Information Processing Model to help explain it.

Why Processing Matters for Learning

If your brain doesn’t fully process new information, you won’t remember it for long—and real learning won’t happen.

But if your brain deeply processes the information—if you think about it, practice it, and connect it to what you already know—then the learning becomes stronger and more permanent.

Later on, we’ll talk more about how your brain stores long-term memories, but for now, remember this: 

The better your brain processes new information, the better you’ll remember it.

 Check Your Understanding

Q: What makes processing complex information harder than simple information?
A: It involves comparison, memory, prediction, and sometimes emotion—all happening at once.

Q: How do feelings affect how we think?
A: Emotions can speed up or slow down thinking. Strong feelings can help memory—but they can also lead to quick, poor choices.

Q: Can stress change how your brain works?
A: Yes. Chronic stress can make it harder to focus, remember, or stay calm. The brain’s chemistry actually changes under stress.

The Information Processing Model: Short-Term and Working Memory

Next, let’s look at how your brain takes in, filters, and stores information. This is called the Information Processing Model, and it helps us understand how learning and memory work.

Step 1: Input — Information From the Outside World

Everything your brain knows about the world comes through your five senses:
sight, hearing, smell, taste, and touch.

When your senses pick something up—like the sound of a bell or the feel of your chair—that information travels to your brain through nerves. This step is called input.

Even fancy technology like virtual reality still depends on your five senses to get information into your brain. No matter what tools we use, our brain can’t know anything unless it first comes through our senses.

 

Step 2: Sensory Register — Filtering Out the Noise

Your brain gets thousands of pieces of information every second. That’s way too much to handle all at once! So your brain has a filter called the sensory register. It decides what’s important and what to ignore.

Think about it:
Right now, can you feel your right foot? You probably weren’t thinking about it until this moment. That’s because your brain was filtering it out so you could focus on other things.

This filtering helps you stay focused and not get overwhelmed. Most of the sights, sounds, and feelings you experience are forgotten almost immediately, unless your brain decides they’re important.

 

Step 3: Limited Storage — Holding Information for a Short Time

If something does get past the sensory register, it goes into a part of your memory called limited storage. This includes:

  • Working Memory – the information you’re using right now (like remembering a question while you’re solving a problem)

  • Short-Term Memory – temporary storage that only lasts a few seconds or minutes

This kind of memory doesn’t last long and can only hold a few things at a time. That’s why it’s easy to forget a phone number right after you hear it or why you walk into a room and forget what you were looking for.

If the information is not processed further, it disappears. But if it’s important and your brain works with it more, it can be stored as long-term memory (which we’ll talk about next!).

 

The Serial Position Effect: When We Remember Best

Scientists and teachers use simple experiments to learn how memory works. One of those experiments is called the Serial Position Test.

Here’s how it works:

  • You see a list of words appear one at a time on a screen (one every 2 seconds).

  • After the last word, you try to write down as many as you can remember.

The “Smiley Curve”: What We Learn From the Results

When researchers look at the results, they find something surprising—and it happens almost every time:

  • People tend to remember the first few words and the last few words best.

  • The middle words are often forgotten.

This pattern creates what looks like a smiley face curve when graphed. Scientists call this the Serial Position Effect.

Two Types of Memory Boost

Primacy Effect:
You remember the first few words because your brain has more time to focus on them. You might repeat them in your head before the next word shows up. But after a few words, it becomes hard to keep up.

Recency Effect:
You remember the last few words because they’re still fresh in your mind. They haven’t had time to fade away yet.

 

Why the Middle Gets Lost

It’s not that the middle words are unimportant. It’s just that:

  • You can’t keep repeating all the earlier words.

  • The later words push the middle ones out of your short-term memory.

  • Your brain has a limited capacity—it can only hold a few things at a time!

What Happens If We Add More Words?

You might think adding more words would mean remembering more. But it doesn’t work that way.

When researchers tested 30 words versus 40 words, the number of words people remembered didn’t change much. The extra words were mostly lost in the middle of the list, where memory is already weak.

 

What This Means for Learning

This test teaches an important lesson: Giving more information doesn’t always lead to more learning.

If we get too much new information at once, we forget more, not less. That’s why it’s better to chunk information, review it often, and not overwhelm your brain.

Check Your Understanding

Q: Why do we forget things we just heard in class?
A: Short-term memory only lasts a few seconds unless we focus and rehearse it—otherwise, it disappears quickly.

Q: What’s the difference between short-term memory and working memory?
A: Short-term memory holds info briefly; working memory not only holds it but also manipulates it while you think.

Q: How can you make working memory stronger?
A: Practice repeating, organizing, and connecting new information—these strategies help you hold and use thoughts more effectively.

The Information Processing Model: Long-Term Memory

Not everything we see or hear becomes a memory. For information to move from short-term memory to long-term memory, our brain needs to go through a special process called consolidation.

What Is Consolidation?

Consolidation means your brain is comparing new information to what it already knows. Imagine I say, “There’s a fish tank next to a brick fireplace in my living room.” Even if you’ve never seen my living room, you probably picture something—because your brain uses old memories of fish tanks and fireplaces to understand new information.

This happens automatically. Your brain is always connecting new information to stuff that’s already stored in your long-term memory.

What Is Rehearsal?

Rehearsal is when you use new information over and over in different ways to help your brain keep it.

Here are examples of rehearsal:

  • A student explains a science concept to a friend.

  • You do homework about something you learned in class.

  • You review your notes before a test.

Every time you go back to new information and work with it, you are helping it stick in your brain!

How Deep Thinking Helps Memory: The Levels of Processing Test

Psychologists ran an experiment to see how different types of questions affect memory. Here’s how it worked:

Students were shown a word and then asked one of three types of questions:

Letter question (Shallow thinking):
“Does the word have the letter D?”
➤ You don’t even need to know what the word means.

Word meaning question (Medium thinking):
“Does ‘humble’ mean the same as ‘rich’?”
➤ You have to understand what both words mean.

Self-reference question (Deep thinking):
“Does the word ‘friendly’ describe you?”
➤ You have to understand the word and think about yourself.

What Happened?

After answering 30 of these questions, students were asked to write down as many words as they could remember.

The results showed:

  • Students remembered very few of the words from the letter questions.

  • They remembered more from the word meaning questions.

  • And they remembered the most from the self-reference questions.

Why?

Because the more you think about something, the more your brain processes it. And the more your brain processes it, the better you remember it.

The Big Idea

The more deeply we think about something, the more we learn it. So if you just glance at a word, you probably won’t remember it. But if you connect it to other ideas or to your own life, your brain holds onto it much better.

This is why good learning involves more than just seeing or hearing facts. It’s about thinking deeply, making connections, and practicing what you learn.

Check Your Understanding

Q: How do facts move from short-term to long-term memory?
A: Through focus, repetition, emotional impact, and connections to what you already know.

Q: Why do we forget things we studied?
A: If the memory wasn’t reviewed, emotionally important, or tied to something meaningful, it often fades over time.

Q: How can I help my brain store information long-term?
A: Use strategies like summarizing, teaching it to someone else, or making a visual—these activate deeper levels of processing. 

 

Attention and Executive Functions: How the Brain Stays on Track

Not all information makes it into your memory. In fact, most of what you see, hear, and feel is forgotten unless your brain decides it’s important enough to save. To turn short-term memory into long-term memory, your brain has to do real work—making new connections between brain cells, which requires energy, focus, and good health.

 

Why Nutrition Matters for Learning

Your brain needs energy to grow and make memories. That’s why eating well is important for learning.

If someone comes to school hungry, it’s much harder for their brain to process and remember new information. Programs that offer school breakfast and lunch don’t just feed students—they help their brains function properly so they can learn and grow.

What Are Executive Functions?

Executive Functions are like the brain’s control center. You can think of it as the conductor of an orchestra – a central controller of a wide variety of instruments. When properly conducted, all the musiciaans perform smoothly with each other, producing beautiful music! Executive functions help you:

  • Pay attention

  • Plan and organize your work

  • Make decisions

  • Remember what’s important

For example:

  • If you realize you didn’t understand a paragraph and decide to read it again, that’s Executive Function at work.

  • If you connect a new science fact to something you learned last month, that’s also your brain using Executive Functions.

 Focus Is Key

You can’t remember something if you don’t pay attention to it. That’s why focus and concentration are so important when you’re trying to learn. Students with ADHD (Attention Deficit Hyperactivity Disorder), for example, might struggle in school—not because they aren’t smart, but because their brains have trouble staying focused long enough to remember new things.

Where Executive Functions Live in the Brain

Most Executive Functions happen in a part of your brain called the frontal lobe. That’s the front part of your brain—just behind your forehead. Inside the frontal lobe is an area called the prefrontal cortex, and it’s one of the last parts of your brain to fully develop.

That means:

  • Young children don’t yet have strong Executive Functions.

  • They need help from adults—like parents and teachers—to stay focused, plan, and stay on track.

Teachers often act like a “second brain” for kids:

  • They help you see which parts of a lesson are most important.

  • They remind you what to focus on.

  • They teach you how to plan your time and your work.

Why This Matters

One of the main goals of school is to help students develop their Executive Functions. A strong STEM curriculum (science, technology, engineering, and math) can help students grow in this area by:

  • Asking important, thought-provoking questions.

  • Helping students learn how to stay focused and organized.

  • Modeling how to think deeply and carefully about information.

Check Your Understanding

Q: Why is attention so important for learning?
A: Attention acts like a gate—if you don’t focus on something, it won’t even enter your memory. No attention, no learning.

Q: What are executive functions, and why do they matter?
A: They’re brain skills like self-control, planning, and mental flexibility. They help you focus, solve problems, and behave responsibly.

Q: Can you strengthen your executive functions?
A: Yes! Every time you make a good decision, resist a distraction, or plan ahead, you’re exercising and improving those skills.

Executive Functions and Artificial Intelligence

Artificial Intelligence, or AI, is a type of technology designed to do tasks that usually require human intelligence—like recognizing faces, answering questions, or even playing games like chess. AI systems are getting better and faster all the time, and they can do some things incredibly well. But does that mean they think like we do?

Not exactly.

The human brain is far more complex than even the most advanced AI. As we’ve learned, our brains process information by using our five senses, and then filter, store, and connect new information to things we already know. We also use Executive Functions to help us make decisions, focus our attention, and solve problems. All of this happens through real physical changes in the brain, like building new connections between neurons, that is, building new synapses.

AI doesn’t work this way. Instead of using senses like sight or hearing, AI systems rely on data and patterns in computer code. When an AI “learns,” it doesn’t create memories or emotions. It adjusts its programming based on past inputs—but it doesn’t understand things the way we do. For example, an AI can be trained to recognize a dog in a photo, but it doesn’t know what a dog feels like to pet or what it means to love one.

Another big difference is in creativity and judgment. While AI can solve problems using massive amounts of information, it doesn’t truly think for itself. Humans can 

ask, “Why does this matter?” or “Is this the right thing to do?” These kinds of decisions often involve values, emotions, and experience—things AI doesn’t have.

Still, AI is a powerful tool. Just like a calculator helps with math, AI can help with sorting information, creating art, translating languages, and more. In school, AI might be used to tutor students, help with writing, or even personalize learning based on your progress. But even the smartest AI needs human guidance—especially from people who can think, feel, and care.

Check Your Understanding

Q: Can AI have executive functions like humans do?
A: No. AI can simulate tasks like planning or switching focus, but it doesn’t choose for moral reasons—it just follows code.

Q: Why compare human thinking to AI?
A: It helps us understand what makes us unique—like free will, conscience, and the ability to love, which AI doesn’t have.

Q: How do executive functions show we’re more than machines?
A: Because we don’t just process data—we reflect, choose, and take responsibility for our actions. That’s something no algorithm can do.