Performance 5 MIN read

What Is The Largest Part Of The Brain And What Is Its Function?

by Ritch Flynn December 21, 2020

The brain is the processor that allows our perception of the world. It’s in a constant cycle of figuring things out. Every moment, your mind is processing data. Taking in new information. Mapping out reality. Understanding what’s going on in the world.

Every day, in each moment, we consider whether or not it’s vital to update our internal map of reality. And it’s the largest part of the brain that’s doing most of this work.

What Are The Parts Of The Brain?

There are three main parts to the brain:


  • The biggest part of the brain
  • Responsible for reading, thinking, learning, speech, emotions, and voluntary muscle movements
  • Controls vision, hearing, and other senses


  • Located at the back of the brain
  • Responsible for balance, coordination, and fine muscle control
  • Maintains posture and equilibrium

Brain stem

  • Located at the bottom of the brain where it connects the cerebrum with the spinal cord
  • Responsible for controlling fundamental body functions, such as breathing, eye movements, blood pressure, heartbeat, and swallowing


What Is The Largest Part Of The Brain?

The cerebrum makes up 80% of your overall brain volume. It is also the most advanced contraption in the known universe, making it also the smartest part of your superbrain.

Because it makes up the largest portion of the brain, the cerebrum is home to many of the 86 billion neurons found in the grey matter of our brains. Known to many as the “seat of consciousness,” it’s where your perception, memory, and data from the senses come together to make sense of everything.

largest part of the brain function

What Is Its Function?

As the largest part of your brain, the cerebrum holds a number of responsibilities:

  • Thinking
  • Controlling your voluntary muscles
  • Holding your memories — both short-term and long-term
  • Helping with reasoning

Structurally, the cerebrum is split into two hemispheres. Scientists believe that the right side of your brain is responsible for your creative and artistic side, while the left side of your brain is methodical and analytical.

Now, each of these two hemispheres is further divided into four lobes: the frontal, parietal, occipital, and temporal lobes.

1. Frontal lobe

Responsible for: movement and speech

You can find the frontal lobe at the front of the brain and it’s the largest of all of the lobes. It’s the hub of your personality, planning, and decision-making. As well as attention, impulse control, and problem-solving, it handles memory, motor skills, and speech. Without it, you wouldn’t have any inhibitions or moral compass.

2. Parietal lobe

Responsible for: sensing, touch

Positioned just behind the frontal lobe, the parietal lobe helps interpret sensory data from the other parts of the brain. The somatosensory cortex, which processes touch and body sensations, is located here.

3. Occipital lobe

Responsible for: visual processing

This is your visual processing center. Located in the back of the brain, the occipital lobe is involved in reading, color recognition, and other visual information from the retina. Your visual memory is also processed here.

4. Temporal lobe

Responsible for: hearing, memory

The temporal lobe handles visual and verbal memory as well as interpreting reactions and emotions. It allows you to recognize faces, process language, and speech. It’s home to structures of the limbic system such as the amygdala, and hippocampus. These also organize impulses and aid in auditory perception.

largest part of the brain

What Is The Difference Between The Cerebrum And The Cerebral Cortex?

The outer crust of the cerebrum is the cerebral cortex.

It’s a 2-4mm layer of grey matter that holds 10% of all the neurons of your brain. Here, sensory and motor data are processed to enable our sense of consciousness. And at over 10 billion nerve cells, the peaks and valleys of the cerebral cortex are the processing powerhouse of your cerebrum.

Train Your Brain

Your brain’s work is never complete. Each moment, it’s processing data to make sense of your world. Within 2/10s of a second, your brain reacts. Each moment we receive data through our senses. And much of this data gets processed in the largest part of your brain, the cerebrum.

Knowing how to grow the powerhouse of your brain is a big responsibility. But through learning something new each day, your superbrain grows itself.

Great things always begin from inside.
— Jim Kwik, the Author of Mindavalley’s Superbrain Program

And sometimes, it’s as simple as just taking the next step of your journey.

Do you have trouble remembering names?

Maybe you struggle to remember important dates or even basic facts and figures you need for a presentation?

If you do, don’t worry - it’s a common problem.

But what’s also common is the myth that some people are just born with good or photographic memory, while the rest of us just have to struggle.

The truth is, memory is just like a muscle - you can train it to be stronger.

Whether you’re a working professional looking to learn new skills, a student cramming for exams, or even just a senior who’s looking to stay sharp - there are techniques you can do to actively and permanently improve your memory.

If You’d Like To Tap Into This Secret Power You Didn’t Know You Have…Then Join Jim Kwik, Peak Performance Expert And Memory Guru, In This FREE Masterclass

From it, you’ll also learn:

The biggest lie we’ve all been told about our brainsthat’s holding us back from our potential. Contrary to conventional wisdom, your memory actually isn’t fixed. Once you realize how much control you have, you’ll begin to discover what you’re truly capable of.

10 powerful mental hacks you can apply to unlock your inner super learner. Small tweaks in these areas could make the difference between being someone who’s forgetful, to someone who has near-perfect memory.

A powerful memorization technique you can use in any situation. You’ll be able to deliver a speech without having to use your notes, and even remember your entire grocery list without having to write it down!

Register Now To Discover Powerful Hacks To Unlock Your Superbrain (Feel the results in 1 hour)

What was the most interesting fact you learned about the largest part of the brain today? Share with us in the comments below!

by Ritch Flynn
Conscious writer, spiritual metalhead, man-splainer. When I’m not mancrushing on Ron Swanson, I write on Medium and Mindvalley. Mostly get my boots on for epic adventures, deep connections & bad jokes.

Related Articles