Contents of the Spinal Column (Final)

Question 1

The spinal cord, spinal nerve roots, and spinal meninges and the neurovascular structures that supply them are located within the ____________________

Answer 1

vertebral canal

Question 2

What is the major reflex center and conductive pathway between the body and brain?

Answer 2

spinal cord

Question 3

The spinal cord is a continuation of what?

Answer 3

medulla (brainstem)

Question 4

In adults, the spinal cord is 42-45 cm long and extends from the foramen magnum in the occipital bone to the level of the _______ vertebra

Answer 4

L2

Question 5

T/F: the spinal cord only occupies the superior 2/3 of the vertebral canal

Answer 5

true

Question 6

The spinal cord is enlarged in 2 regions. What are these 2 regions called and what segments are included?

Answer 6

Cervical enlargement has the brachial plexus from C4-T1

lumbosacral enlargement has the lumbosacral plexus from T11-S1

Question 7

The brachial plexus is from C4-T1. The anterior rami of the spinal nerves arise from it innervates the…..

Answer 7

upper limbs

Question 8

The lumbosacral plexus is from T11-S1. The anterior rami of the spinal nerves innervate the….

Answer 8

lower limbs

Question 9

The portion of the spinal cord giving rise to the rootlets and roots that ultimately form one bilateral pair of spinal nerves is designated a ________________, the identity of which is the same as the spinal nerves arising from it

Answer 9

spinal cord segment

Question 10

The first cervical nerves lack posterior roots in ______% of people

Answer 10

50

Question 11

T/F: in embryos, the spinal cord occupies the full length of the vertebral canal

Answer 11

true

Question 12

By the end of the embryonic period (8th week), the tail like caudal eminence has disappeared, and the number of coccygeal vertebrae is reduced from 6 segments to _____ segments. The spinal cord in the vertebral canal of the coccyx atrophies

Answer 12

4

Question 13

At birth, the tip of the medullary cone is at level ________

Answer 13

L4/L5

Question 14

Which nerve roots are the longest?

Answer 14

lumbar and sacral nerve roots

Question 15

The loose bundle of spinal nerve roots arising from the lumbosacral enlargement and the medullary cone and coursing within the lumbar cistern of CSF caudal to the termination of the spinal cord resembles a horses tail, hence the name…..

Answer 15

cauda equina

Question 16

Arising from the tip of the medullary cone, the __________________ descends among the spinal nerve roots in the cauda equina

Answer 16

terminal filum

Question 17

The ___________________ is the vestigial remnant of the caudal portion of the spinal cord that was in the tail-like caudal eminence of the embryo

Answer 17

filum terminale

Question 18

What is another name for the external terminal filum?

quiz q

Answer 18

coccygeal ligament

Question 19

The ____________ is an anchor for the inferior end of the spinal cord and the spinal meninges

Answer 19

terminal filum

Question 20

The spinal dura mater is separated from the periosteum and the ligaments that form the walls of the vertebral canal by the ______________ space

Answer 20

epidural

Question 21

The epidural space is occupied by the ____________________ plexus embedded in a fatty matrix (epidural fat)

Answer 21

internal vertebral venous

Question 22

The epidural space runs the length of the vertebral canal, terminating superiorly at the _________________ and laterally at the ________ as the dura mater adheres to the periosteum surrounding each opening and inferiorly as the sacral hiatus is sealed by the sacrococcygeal ligament

Answer 22

foramen magnum, IVF

Question 23

Nerve fibers are distributed to the dura mater by the _________________ nerves

Answer 23

recurrent meningeal

Question 24

The ___________________________ is a delicate, avascular membrane composed of fibrous and elastic tissue that lines the spinal dural sac and its dural root sheaths. It is not attached to the dura mater but is held against its inner surface by the pressure of CSF

Answer 24

spinal arachnoid mater

Question 25

Is the subarachnoid space an actual or potential space?

Answer 25

actual space

Question 26

Is the subdural space an actual or potential space?

Answer 26

potential space, can have a subdural hematoma during trauma or injury

Question 27

The arachnoid mater is seperated from the pia mater on the surface of the spinal cord by the….

Answer 27

subarachnoid space containing CSF

Question 28

What are the delicate stands of CT called that span the subarachnoid space and connect the arachnoid mater to pia mater?

Answer 28

arachnoid trabeculae

Question 29

Which mater directly covers the roots of the spinal nerves and the spinal blood vessels?

Answer 29

pia mater

Question 30

Inferior to the medullary cone, the pia mater continues as the….

Answer 30

terminal filum

Question 31

The spinal cord is suspended in the dural sac by the terminal filum and….

Answer 31

denticulate ligaments (which run longitudinally along each side of the spinal cord)