Spinal Cord

Question 1

What are the 3 faniculi of the spinal cord

Answer 1

posterior, lateral and anterior faniculi

Question 2

name the 4 sulci of the spinal cord

Answer 2

Posterior median, Posterior intermediate, Posterolateral, and Anterolateral

Question 3

What is the caudal extend of the posterior intermediate sulcus

Answer 3

Found only above cord level T-6

Question 4

What fiber bundles are on either side of the posterior intermediate sulcus

Answer 4

fasciculus grascilis (leg) and fasciculus cuneatus (arm)

Question 5

name the cord levels between which the lateral horn is found

Answer 5

T1-L2

Question 6

Name the 2 structures that stabilize the spinal cord in the vertebral canal

Answer 6

cerebral spinal fluid and meninges (pia mater forms denticulate ligaments)

Question 7

Sensory function modulated by lamina II

Answer 7

Substantia gelatinosa (important in pain)

Question 8

direction impulses travel in posterior root

Answer 8

toward the spinal cord

Question 9

direction impulses travel in anterior root

Answer 9

away from the spinal cord

Question 10

what is the function of the posterior root ganglion

Answer 10

direct sensory signals to appropriate integration centers

Question 11

rami are ____ in function

Answer 11

both motor and sensory

Question 12

what does gray matter consist of

Answer 12

cell bodies and dendrites

Question 13

White matter consists of …

Answer 13

myelinated axons

Question 14

What signals are transmited through the Posterior horn

Answer 14

sensory. receives incoming signals

Question 15

What signals are transmitted through the lateral horn

Answer 15

motor neurons of the autonomic nervous system

Question 16

What signals are transmitted through the Anterior horn

Answer 16

Motor neurons of the Somatic nervous system

Question 17

Nerve fibers that make up the Cauda equina

Answer 17

Posterior and anterior roots of L2-L5, S1-S5 and coccygeal nerve.

Question 18

Vertebral level that marks the most caudal extent of the conus medullaris

Answer 18

L1-L2 interspace

Question 19

tissue that makes up the denticulate ligaments

Answer 19

pia mater

Question 20

tissue that makes up the filum terminale

Answer 20

pia and arachnoid mater

Question 21

What is contained in the lumbar cistern

Answer 21

conus medullaris, cauda euina, filum terminale, dura mater and arachnoid mater

Question 22

embryological origin of the nucleus pulpus

Answer 22

notochord

Question 23

clinical significance of nucleus puplus

Answer 23

it can herniate through the annulus fibrosis and put pressure on nearby nerve fibers

Question 24

vertebral levels of greatest mobility

Answer 24

C1-2, C5-6, T12-L1

Question 25

What fills the subarachnoid space

Answer 25

Cerebral Spinal Fluid

Question 26

what fibers make up the posterior funiculus

Answer 26

fibers that make up the white matter that lies between the two posterolateral sulci

Question 27

What fibers make up the lateral funiculus

Answer 27

fibers that make up the white matter that lies between the posterolateral suclus and the anterolateral sulcus

Question 28

What fibers make up the anterior funiculus

Answer 28

fibers that make up the white matter that lies between the two anterolateral sulci

Question 29

A cross section of the spinal cord that's in the shape of a football came from what level?

Answer 29

cervical

Question 30

significant structures in the spinal cord at the cervical level

Answer 30

Fasciculus grascilis and cuneatus. Posterior and anterior horns

Question 31

cervical spondylosis

Answer 31

bony ridges on the vertebral bodies which cause a narrowing in the vertebral foramina