Question 1

Which of the following best describes the primary function of the thalamus in the central nervous system?

Accepted Answer

It acts as the main relay station for sensory information (except olfaction) to the cerebral cortex.

Question 2

A patient presents with an inability to initiate voluntary movements and a resting tremor. Which brain structure is most likely affected?

Accepted Answer

Substantia nigra

Question 3

Which of the following statements about the blood brain barrier is correct?

Accepted Answer

It is formed by tight junctions between endothelial cells of brain capillaries, limiting the passage of large, polar molecules.

Question 4

Damage to which area of the brain would most likely result in expressive aphasia, characterized by difficulty producing speech but intact comprehension?

Accepted Answer

Broca’s area

Question 5

Which pathway is responsible for transmitting fine touch and proprioceptive information from the body to the cerebral cortex?

Accepted Answer

Posterior columns/medial lemniscal system

Question 6

A patient with damage to the right parietal association cortex is most likely to experience which of the following symptoms?

Accepted Answer

Neglect of the left side of their visual field and body

Question 7

Which of the following best explains why bacterial meningitis is more dangerous than viral meningitis?

Accepted Answer

Bacterial meningitis can rapidly progress to brain involvement and death without aggressive antibiotic treatment.

Question 8

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulation of body temperature, hunger, and the sleep/wake cycle

Question 9

Which structure connects the right and left cerebral hemispheres, allowing communication between them?

Accepted Answer

Corpus callosum

Question 10

A patient is unable to move or feel their lower limbs after a spinal cord injury, but can still move their arms and breathe independently. The injury most likely occurred at which spinal level?

Accepted Answer

Between the first and second lumbar vertebrae

Question 11

Which of the following best describes the role of the cerebellum in voluntary movement?

Accepted Answer

It monitors ongoing movement and corrects motor error to produce smooth, coordinated actions.

Question 12

Which of the following is true regarding the organization of gray and white matter in the brain and spinal cord?

Accepted Answer

In the brain, gray matter is mostly superficial, while in the spinal cord, gray matter is deep.

Question 13

Which of the following best explains the placebo effect in pain perception?

Accepted Answer

It involves a descending pathway that releases endorphins, reducing the sensitivity of neurons in the posterior horn to pain.

Question 14

Which of the following is a correct sequence for the conduction of an action potential in the brain involving all three types of cerebral white matter fibers?

Accepted Answer

Projection fiber → Association fiber → Commissural fiber

Question 15

Which of the following best describes the function of the limbic system?

Accepted Answer

It is involved in memory, learning, emotion, and behavior.

Question 16

A patient with damage to the left temporal cortex would most likely have difficulty with which of the following?

Accepted Answer

Naming objects and understanding language

Question 17

Which of the following is a function of the reticular formation?

Accepted Answer

Regulation of arousal, consciousness, and the sleep/wake cycle

Question 18

Which of the following best explains why hydrocephalus can lead to brain damage?

Accepted Answer

Excess cerebrospinal fluid increases intracranial pressure, compressing brain tissue.

Question 19

Which of the following best describes the function of the basal nuclei?

Accepted Answer

They inhibit involuntary movement and initiate voluntary movement.

Question 20

Which of the following is true regarding the decussation of motor fibers in the corticospinal tract?

Accepted Answer

Most fibers cross over at the medullary pyramids, resulting in contralateral control of movement.

The Central Nervous System: Structure, Function, and Integration

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