Question 1

Which of the following statements about the adult human brain is correct?

Accepted Answer

The average male brain is about 10% larger than the average female brain due to differences in body size.

Question 2

During embryonic development, the central cavity of the neural tube is called the:

Accepted Answer

Neurocoel

Question 3

A patient presents with difficulty initiating voluntary movements, increased muscle rigidity, and a resting tremor. Which brain structure is most likely affected?

Accepted Answer

Substantia nigra

Question 4

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

It biochemically isolates neural tissue of the brain from general circulation.

Question 5

A patient is unable to recognize objects placed in their hand with their eyes closed, but can describe their texture and temperature. This deficit is called:

Accepted Answer

Asteriognosis

Question 6

Which lobe of the cerebrum is primarily responsible for voluntary motor function, decision making, and planning?

Accepted Answer

Frontal lobe

Question 7

A patient with damage to the right parietal lobe may have difficulty with which of the following tasks?

Accepted Answer

Recognizing faces and understanding three-dimensional relationships

Question 8

Which cranial nerve is responsible for the sense of smell?

Accepted Answer

Olfactory nerve (CN I)

Question 9

A patient presents with loss of balance, nausea, and inability to hear in one ear. Which cranial nerve is most likely affected?

Accepted Answer

Vestibulocochlear nerve (CN VIII)

Question 10

Which of the following is a function of the hypothalamus?

Accepted Answer

Regulating homeostasis, including body temperature and hormone secretion

Question 11

A patient has difficulty swallowing, loss of taste sensation on the posterior third of the tongue, and decreased salivation. Which cranial nerve is most likely damaged?

Accepted Answer

Glossopharyngeal nerve (CN IX)

Question 12

Which of the following best explains the phenomenon of referred pain?

Accepted Answer

Strong visceral pain sensations stimulate interneurons in specific spinal segments, leading to pain being perceived at a different body surface location.

Question 13

Which structure is responsible for producing cerebrospinal fluid (CSF)?

Accepted Answer

Choroid plexus

Question 14

A patient with a lesion in the cerebellum is most likely to experience which of the following symptoms?

Accepted Answer

Tremors and lack of coordination

Question 15

Which of the following is true regarding the corpus callosum?

Accepted Answer

It is a bundle of nerve fibers that connects the two cerebral hemispheres.

Question 16

A patient is unable to move their tongue properly and the tongue deviates to one side when protruded. Which cranial nerve is most likely damaged?

Accepted Answer

Hypoglossal nerve (CN XII)

Question 17

Which of the following best describes the function of the thalamus?

Accepted Answer

It acts as a relay and integration center for sensory information (except smell) to the cerebral cortex.

Question 18

A patient with a stroke affecting the left cerebral hemisphere is most likely to experience which of the following deficits?

Accepted Answer

Impaired language skills such as speaking and writing

Question 19

Which of the following equations best represents the relationship between the volume of cerebrospinal fluid (CSF) produced and the time it takes for the entire volume to be replaced?

Accepted Answer

$V_{CSF} = R_{prod} 	imes t_{replace}$

Question 20

A patient is unable to shrug their shoulders against resistance and has difficulty turning their head to the opposite side. Which cranial nerve is most likely affected?

Accepted Answer

Accessory nerve (CN XI)

The Brain and Cranial Nerves: Anatomy & Physiology Study Notes

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