Ch 10 Spinal cord and apinal nerves

Question 1

Vertebral column

Answer 1

24 spinal vertebra plus sacrum and coccyx

Question 2

Meninges

Answer 2

Dura matter , arachnoid , pia matter

Question 3

Cerebrospinal fluid CNS

Answer 3

found b/w dura mater and the arachnoid mater

acts as a cushion around the spinal cord and brain

Question 4

Blood brain barrier

Answer 4

composed of selective cells that prevent toxins from entering the CNS from blood

Question 5

spinal cord runs from where

Answer 5

the inferior part of the brain to the level of L1

Question 6

Conus Medullaris

Answer 6

where the spinal cord arts to taper and end at the L1

Question 7

Filum terminale

Answer 7

arises from the conus medullaris

extension of the pia mater that fuses with the arachnoid and dura mater

Question 8

Spinal Roots

Answer 8

2 bundles of axons connect each spinal nerve to a segment of the spinal cord

Question 9

Posterior Root

Answer 9

Sensory

Question 10

Anterior Root

Answer 10

motor

Question 11

Nerve roots inside spinal cord

Answer 11

Grey matter -central “butterfly shape”

white matter -peripheral

Question 12

dermatomes

Answer 12

the area of skin that provides sensory information to a specific spinal level.

Question 13

Cervical plexus

Answer 13

C1-C5

phrenic nerve- causes contraction of the diaphragm for breathing

Question 14

Brachial plexus

Answer 14

C5-T1

distribution to upper extremities
Thoracic Outlet Syndrome- compression of the brachial plexus associated w/ vascular compression

Question 15

lumbar plexus

Answer 15

L1-L4

Supplies part of abdomen , external genitalia & part of lower limbs

Question 16

Sacral Plexus

Answer 16

S1-S4

supplies butt , perineum and part of lower limb

Question 17

Coccygeal plexus

Answer 17

S4, S5 and coccygeal

Question 18

Sensory tract

Answer 18

referred to ascending tracts

Question 19

motor tracts

Answer 19

descending tracts