Deck 19: The Spinal Cord and Spinal Nerves

Question 1

The spinal nerves are nerves.

A) motor
B) sensory
C) mixed

Answer 1

C

Question 2

What functional type of neuron is found in the dorsal root ganglion?

A) motor
B) both sensory and motor
C) sensory
D) There are only interneurons in the dorsa root ganglion.

Answer 2

C

Question 3

There are pairs of cervical spinal nerves and _ pairs of lumbar spinal nerves.

A) 7, 5
B) 8, 12
C) 7, 12
D) 8, 5

Answer 3

D

Question 4

This extension of one of the meninges covering the spinal cord attaches it to the coccyx.

A) dura mater
B) conus medullaris
C) denticulate ligament
D) filum terminale

Question 5

This nerve of the brachial plexus supplies all the extensor muscles of the upper limb.

A) median
B) musculocutaneous
C) ulnar
D) radial

Question 6

The ventral rami of spinal nerves form the major nerve plexuses.

A) T2 through T12
B) C1 through T1
C) C1 through T1 and L1 through S4
D) L1 through S4

Question 7

In addition to its role in spinal reflex activity, the spinal cord also _ .

A) controls movement of the limbs
B) contains sensory and motor tracts traveling to and from higher nervous centers
C) is associated with consciousness
D) perceives sensation

Question 8

At the level of the first or second lumbar vertebra the spinal cord terminates in a structure called the .

A) conus medullaris
B) filum terminale
C) dura mater
D) denticulate ligament

Question 9

Somatosensory functions are carried out in this part of the spinal cord.

A) lateral and ventral fiber tracts and ventral horns
B) dorsal white columns and dorsal horns
C) lateral fiber tracts and lateral horns
D) ventral fiber tracts and ventral horns

Question 10

This nerve, arising from the cervical plexus, is essential for normal breathing.

A) lesser occipital
B) phrenic
C) greater auricular
D) transverse cervical

Question 11

These horns of the spinal cord are present only in the thoracic and lumbar regions.

A) ventral
B) lateral
C) dorsal

Question 12

There are _ enlargements of the spinal cord.

A) 1
B) 2
C) 3
D) 4

Question 13

Ventral roots of spinal nerves are purely or primarily _.

A) motor
B) mixed sensory and motor
C) sensory

Question 14

How many pairs of spinal nerves are present in humans?

A) 24
B) 29
C) 28
D) 31

Question 15

Nerves serving the lower limb issue from this enlargement of the spinal cord.

A) lumbar
B) thoracic
C) cervical
D) sacral

Question 16

The meninges that cover the spinal cord from outermost to innermost are .

A) dura mater, arachnoid mater, pia mater
B) pia mater, arachnoid mater, dura mater
C) dura mater, pia mater, arachnoid mater
D) arachnoid mater, dura mater, pia mater

Question 17

These ascending (sensory) tracts are the most lateral ones between the dorsal and ventral roots of the spinal cord.

A) corticospinal tracts
B) spinothalamic tracts
C) spinocerebellar tracts
D) dorsal white columns

Question 18

These fiber tracts run between the dorsal horns.

A) spinocerebellar tracts
B) dorsal white columns
C) spinothalamic tracts
D) corticospinal tracts

Question 19

These fiber tracts carry signals about voluntary movement to the spinal cord.

A) corticospinal tracts
B) dorsal white columns
C) spinothalamic tracts
D) spinocerebellar tracts

Question 20

The dorsal rami of spinal nerves _ _.

A) serve the skin and muscles of the posterior body trunk
B) form nerve plexuses that serve the limbs
C) serve the muscles of the intercostal spaces and skin and muscles of the anterior trunk

Question 21

Transection of the dorsal roots of spinal nerves C5 through T1 results in .

A) loss of movement in the upper limb on the opposite side of the body
B) loss of movement in the upper limb on the same side of the body
C) loss of sensation in the upper limb on the same side of the body
D) loss of sensation in the upper limb on the opposite side of the body

Question 22

The following represents a collection of spinal nerve roots hanging from the inferior end of the spinal cord.

A) dorsal roots
B) filum terminale
C) denticulate ligament
D) cauda equina

Question 23

Damage to the lumbar plexus is likely to affect .

A) flexion of the knee
B) adduction of the thigh
C) extension of the knee
D) dorsiflexion of the foot

Question 24

The odd tingling sensation that you experiences when you hit the funny bone is due to trauma to the nerve.

A) radial
B) ulnar
C) median
D) axillary

Question 25

The varicella zoster virus causing chicken pox can stay dormant in the sensory neurons in the dorsal root ganglion. It can get reactivated later on in life causing .

A) sciatica
B) quadriplegia
C) hemiplegia
D) shingles