Human Brain Anatomy: Central Sulcus

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Questions and Answers

What is the distinctive feature of the central sulcus?

It's a curved sulcus

It's a short, thick sulcus

It's a narrow, zigzag sulcus

It's a long, roughly straight sulcus with an S-shaped bend (correct)

What is the function of the hand in the somatic motor and somatic sensory cortex?

It's represented by the S-shaped bend of the central sulcus (correct)

It's responsible for hearing

It's responsible for smell

It's responsible for vision

What is the region of the cerebral hemisphere to the front of the central sulcus?

Frontal lobe (correct)

Temporal lobe

Parietal lobe

Occipital lobe

What is the gyrus near the dorsal midline of the frontal lobe?

Superior frontal gyrus Signup and view all the answers

What is the gyrus along the inferior margin of the frontal lobe?

Inferior frontal gyrus Signup and view all the answers

What separates the superior, middle, and inferior frontal gyri?

Two meandering sulci Signup and view all the answers

What is the region of the cerebral hemisphere behind the central sulcus?

Not specified in the text Signup and view all the answers

What is the name of the sulcus that extends from the dorsal midline to the lateral fissure?

Central sulcus Signup and view all the answers

How many gyral structures are in the frontal lobe?

Three Signup and view all the answers

What is the name of the sulcus that separates the parietal and occipital lobes?

Parieto-occipital sulcus Signup and view all the answers

What is the name of the gyrus that is located posterior to the central sulcus?

Postcentral gyrus Signup and view all the answers

What is the name of the lobule located inferior to the intraparietal sulcus?

Inferior parietal lobule Signup and view all the answers

What is the name of the fissure that separates the temporal lobe from the rest of the hemisphere?

Lateral fissure Signup and view all the answers

How many temporal gyri are visible from the lateral surface of the hemisphere?

3 Signup and view all the answers

What is the name of the sulcus between the superior and middle temporal gyri?

Superior temporal sulcus Signup and view all the answers

What is the name of the notch that helps define the interior boundary of the occipital lobe?

Pre-occipital notch Signup and view all the answers

What is the difference between the lateral fissure in the right and left hemispheres?

The lateral fissure is longer and straighter in the left hemisphere Signup and view all the answers

What is the name of the gyrus that is located posterior to the postcentral gyrus?

Superior parietal lobule Signup and view all the answers

What is the name of the sulcus that separates the superior and inferior parietal lobules?

Intraparietal sulcus Signup and view all the answers

Study Notes

Lateral Surface of the Human Brain

The right hemisphere of the brain specimen is being examined.
The central sulcus is a long, roughly straight sulcus with a distinctive S-shaped bend, separating the hand in the somatic motor and somatic sensory cortex.
The frontal lobe is located in front of the central sulcus and consists of:
- Precentral gyrus
- Superior frontal gyrus
- Middle frontal gyrus
- Inferior frontal gyrus
These gyri are separated by two meandering sulci: inferior frontal sulcus and superior frontal sulcus.

Parietal Lobe

The parietal lobe is located behind the central sulcus.
The postcentral gyrus is the posterior boundary of the central sulcus.
The parietal lobe consists of:
- Inferior parietal lobule
- Superior parietal lobule
The intraparietal sulcus is a deep sulcus that separates the superior and inferior parietal lobules.

Occipital Lobe

The occipital lobe is located behind the parietal lobe.
The parieto-occipital sulcus is a deep sulcus that defines the boundary between the occipital and parietal lobes.
The pre-occipital notch is a notch that helps define the interior boundary of the occipital lobe.

Temporal Lobe

The temporal lobe is located inferior to the lateral fissure.
The lateral surface of the temporal lobe consists of three long, straight, parallel gyri:
- Superior temporal gyrus
- Middle temporal gyrus
- Inferior temporal gyrus
These gyri are separated by two sulci: superior temporal sulcus and inferior temporal sulcus.

Comparison between Hemispheres

The left hemisphere would show similar gyral features as the right hemisphere.
The lateral fissure tends to be longer and straighter in the left hemisphere compared to the right.

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Description

Explore the lateral surface of the human brain, focusing on the central sulcus, its location, and its role in the somatic motor and somatic sensory cortex. Learn about the distinctive S-shaped bend and its significance in brain anatomy.