Question 1

Which structure in the spinal cord contains fibers that cross in the gray commissure, allowing communication between the left and right sides of the spinal cord?

Accepted Answer

Gray Commissure

Question 2

A patient presents with loss of motor function in the lower limbs. Damage to which spinal cord structure is most likely responsible?

Accepted Answer

Ventral (Anterior) Horn

Question 3

Which cranial nerve is responsible for hearing and balance, and what is its Roman numeral designation?

Accepted Answer

Vestibulocochlear (VIII)

Question 4

If the dorsal root of a spinal nerve is severed, which function will be lost?

Accepted Answer

Sensory function

Question 5

Which nerve plexus supplies the upper limb, including the radial and ulnar nerves?

Accepted Answer

Brachial Plexus

Question 6

A patient cannot flex their elbow and has numbness in the lateral forearm. Which major nerve is most likely affected?

Accepted Answer

Musculocutaneous Nerve

Question 7

Which of the following correctly matches the cranial nerve with its primary function?

Accepted Answer

Oculomotor (III) – Eye movement

Question 8

Which equation best represents the number of spinal nerve pairs in the human body?

Accepted Answer

$$N = 31$$

Question 9

A patient has difficulty extending their knee and decreased sensation over the anterior thigh. Which nerve is most likely damaged?

Accepted Answer

Femoral Nerve

Question 10

Which spinal cord region contains both ascending sensory and descending motor tracts?

Accepted Answer

Funiculi (White Columns)

Question 11

If a patient has impaired shoulder abduction and weakness in the deltoid muscle, which nerve is most likely affected?

Accepted Answer

Axillary Nerve

Question 12

Which cranial nerve is responsible for the sense of smell?

Accepted Answer

Olfactory (I)

Question 13

Which nerve root carries motor (efferent) fibers away from the spinal cord?

Accepted Answer

Ventral (Anterior) Root

Question 14

A patient presents with foot drop and inability to dorsiflex the foot. Which nerve is most likely injured?

Accepted Answer

Common Fibular Nerve

Question 15

Which of the following is NOT a function of the spinal cord?

Accepted Answer

Producing hormones for metabolism

Question 16

Which equation best describes the relationship between the number of cervical spinal nerves ($$C) $$and cervical vertebrae ($$V$$)?

Accepted Answer

$$C = V + 1$$

Question 17

Which nerve is responsible for innervating most of the muscles of the anterior forearm and some muscles of the hand?

Accepted Answer

Median Nerve

Question 18

Which cranial nerve controls the muscles of facial expression?

Accepted Answer

Facial (VII)

Question 19

A patient has difficulty swallowing and loss of taste in the posterior third of the tongue. Which cranial nerve is most likely affected?

Accepted Answer

Glossopharyngeal (IX)

Question 20

Which nerve plexus supplies the lower limb, including the femoral and obturator nerves?

Accepted Answer

Lumbar Plexus

The Spinal Cord & Nerves: Structure, Function, and Major Pathways

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