Question 1

Which of the following best describes the function of the pre-central gyrus in the brain?

Accepted Answer

It is responsible for voluntary motor movement initiation.

Question 2

A patient suffers a stroke that damages the Broca's area of the brain. Which of the following symptoms would most likely result?

Accepted Answer

Difficulty in producing coherent speech, despite understanding language.

Question 3

The central sulcus is an important landmark in the brain because it separates which two major gyri?

Accepted Answer

The pre-central gyrus and the post-central gyrus

Question 4

Which lobe of the brain is primarily responsible for processing visual information?

Accepted Answer

Occipital lobe

Question 5

A person is unable to feel touch on their right index finger after a localized brain injury. Which area is most likely damaged?

Accepted Answer

Left post-central gyrus

Question 6

Which of the following best explains the concept of the sensory homunculus?

Accepted Answer

A representation of the body’s sensory input distribution on the post-central gyrus.

Question 7

If the longitudinal fissure is damaged, which of the following structures is most likely to be affected?

Accepted Answer

The falx cerebri

Question 8

Which of the following equations best represents the relationship between the number of neurons ($$N) in a $$given area and the size of its representation on the sensory homunculus ($$S$$)?

Accepted Answer

$$S = k 	imes N$$

Question 9

A patient can understand spoken language but cannot repeat words or form coherent speech. Which brain area is most likely damaged?

Accepted Answer

Broca's area

Question 10

Which of the following best describes the function of the basal nuclei (basal ganglia)?

Accepted Answer

They regulate and coordinate voluntary motor movements.

Question 11

A person is unable to recognize faces after a traumatic brain injury. Which lobe is most likely affected?

Accepted Answer

Temporal lobe

Question 12

Which of the following is true regarding the post-central gyrus?

Accepted Answer

It is the primary somatosensory cortex.

Question 13

Damage to the Wernicke's area would most likely result in which of the following?

Accepted Answer

Inability to comprehend spoken or written language

Question 14

Which of the following best explains why the hands and lips have a disproportionately large representation on the sensory homunculus?

Accepted Answer

They contain more sensory receptors and require finer discrimination.

Question 15

A patient is able to move their right arm but cannot feel touch on it. Which area of the brain is most likely damaged?

Accepted Answer

Left post-central gyrus

Question 16

Which of the following best describes the role of association areas in the cerebral cortex?

Accepted Answer

They process and integrate sensory and motor information for higher functions.

Question 17

If a neuron in the pre-central gyrus is severed before it reaches the spinal cord, what is the most likely result?

Accepted Answer

Loss of voluntary movement in the corresponding body part.

Question 18

Which of the following best describes the function of the falx cerebri?

Accepted Answer

It stabilizes the brain by extending into the longitudinal fissure.

Question 19

A patient has difficulty coordinating smooth, purposeful movements but has no loss of sensation or paralysis. Which brain structure is most likely affected?

Accepted Answer

Basal nuclei (basal ganglia)

Question 20

Which of the following best explains why a lesion in the left pre-central gyrus would affect the right side of the body?

Accepted Answer

Motor pathways decussate (cross over) to the opposite side in the brainstem.

Cerebral Cortex Structure and Functional Areas: Anatomy & Physiology Study Notes

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