Deck 19: The Spinal Cord and Spinal Nerves

Question 1

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

Answer 1

B

Question 2

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

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

Answer 2

A

Question 3

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

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

Answer 3

B

Question 4

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

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

Question 5

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

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

Question 6

How many pairs of spinal nerves are present in humans?

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

Question 7

These fiber tracts run between the dorsal horns.

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

Question 8

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

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

Question 9

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

A)ventral
B)lateral
C)dorsal

Question 10

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

Question 11

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

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

Question 12

Damage to the lumbar plexus is likely to affect .

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

Question 13

The dorsal rami of spinal nerves _ _.

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

Question 14

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

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

Question 15

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

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

Question 16

There are _ enlargements of the spinal cord.

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

Question 17

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

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

Question 18

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

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

Question 19

Ventral roots of spinal nerves are purely or primarily .

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

Question 20

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

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

Question 21

The spinal nerves are nerves.

A)sensory
B)mixed
C)motor

Question 22

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

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