Deck 28: Meninges, Spinal Cord, and Spinal Nerves

Question 1

On the dermatome map, the sacral nerves generally innervate the genital, buttock, anal, and posterior lower limb regions.

Answer 1

True

Question 2

The lumbar plexus is considered to be the most complex of the nerve plexuses.

Answer 2

False

Question 3

The meninges surround and protect the entire CNS and PNS.

Answer 3

False

Question 4

The numbers of spinal nerve pairs in the cervical, thoracic, lumbar, sacral and coccygeal regions are ________ respectively.

A)8, 12, 5, 5, and 4
B)7, 12, 5, 5, and 1
C)7, 10, 5, 4, and 1
D)8, 12, 5, 5, and 1
E)7, 12, 5, 5, and 4

Question 5

Spinal nerves are called mixed nerves because they contain both sensory and motor nerve fibers.

Question 6

The filum terminale anchors the inferior end of the spinal cord to the

A)L1 vertebra.
B)sacrum.
C)L2 vertebra.
D)S5 vertebra.
E)coccyx.

Question 7

The anterior ramus of each spinal nerve sends out communicating rami that connect to

A)the brain.
B)the meninges.
C)a sympathetic trunk ganglion.
D)the vertebrae.
E)the skin and muscles of the back.

Question 8

Which of the following is NOT true of the epidural space?

A)It lies between the vertebrae and the dura mater.
B)It contains connective tissue and blood vessels.
C)It contains cerebrospinal fluid.
D)It is the site for epidural injections of anesthetics.
E)All of these are true of the epidural space.

Question 9

Which of the following is true of the subarachnoid space?

A)It contains cerebrospinal fluid, which cushions and nourishes the neurons of the spinal cord.
B)It lies between the dura mater and the arachnoid mater.
C)It is attached to the outer edge of the spinal cord.
D)It contains blood, which brings oxygen to the spinal cord neurons.
E)None of these is true of the subarachnoid space.

Question 10

The obturator and genitofemoral nerves are part of the ________ plexus.

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

Question 11

Which of the following is NOT true of the white matter of the spinal cord?

A)The white matter surrounds the gray matter in the spinal cord.
B)The white matter is located in columns.
C)The ascending tracts of the white matter contain motor neurons.
D)Some of the white matter tracts decussate to the opposite side, either in the spinal cord or in the brainstem.
E)All of these are true of the white matter of the spinal cord.

Question 12

What is the function of the cervical enlargement of the spinal cord?

A)It contains extra gray matter to provide the necessary innervation to the upper limbs.
B)It provides extra innervation to the heart and lungs.
C)It contains extra gray matter to provide the necessary innervation to the lower limbs.
D)It provides a large amount of neurons to control the postural muscles of the back.
E)It contains many neurons to provide accurate sensation to all areas of the trunk.

Question 13

Which of the following is the correct description of the pia mater?

A)The layer of the meninges that is thin and weblike
B)The innermost layer of the meninges
C)The layer of the meninges that is much thicker and tougher than the others
D)The outermost layer of the meninges
E)The middle layer of the meninges

Question 14

All of the following are major spinal nerve plexuses except the ________ plexus.

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

Question 15

The anterior roots of the spinal nerves contain motor neurons.

Question 16

Which of the following nerves are the components of the large sciatic nerve?

A)Superior and inferior gluteal nerves
B)Pudendal and femoral nerves
C)Obturator and genitofemoral nerves
D)Obturator and femoral nerves
E)Tibial and common fibular nerves

Question 17

Which of the following nerves is part of the cervical plexus?

A)Musculocutaneous nerve
B)Median nerve
C)Femoral nerve
D)Phrenic nerve
E)Pudendal nerve

Question 18

Which of the following is NOT true of the brachial plexus?

A)Its nerves control the shoulder and upper limb muscles.
B)It gives rise to the musculocutaneous, axillary, radial, median and ulnar nerves.
C)It is mainly derived from spinal nerves C5-C8, and T1.
D)It contains the phrenic nerve and  the ansa cervicalis.
E)All of these are true of the brachial plexus.