chapter 4 spine cross sectional

a potential space called the subdural space runs between the

arachnoid mater and dura mater

the dura mater extends to approximately which vertebral level?

S2

what structure contain the nerve cell bodies of the efferent (motor) neurons

ventral horns

the largest branch of the lumbar plexus descending beneath the inguinal ligament is the

femoral nerve

which artery is formed just caudal to the basilar artery, by the union of two small branches of the vertebral arteries?

anterior spinal artery

the ____ are extensions of the pia mater; they attach to the dura mater to prevent movement of the spinal cord within the spinal canal

denticulate ligaments

the two ___project from the vertebral body to meet with two laminae that continue posterior and medial to form a ____ process

pedicles, spinous

the ______ plexus arises from the ventral rami of C5-C8 and T1

brachial

the conus medullaris is located at approximately is located at approximately the level of

T12-L1

____ veins drain the bodies of the vertebra before joining the anterior and internal venous plexuses

basivertebral

the _____ nerve is the largest nerve in the body

sciatic

the ____ muscles are superficial bandage like muscles that originate on the spinous processes of C7-T6 and the inferior half of the ligamentum nucae

splenius

the _____ of the cervical vertebrae allow for the passage of vertebral arteries and veins as they ascend to descend from the head

transverse foramen

state two components that make up the intervertebral disk

nucleus pulposus, annulus fibrosus

structures that make up the vertebral arch

\-2 pedicles

\-2 laminae

\-1 spinous process

\-2 transverse process

\-2 superior, 2 inferior articular process

the sciatic nerve descends vertically along the posterior thigh to divide into which nerves?

tibial and peroneal nerves

T/F C7 does not typically have a bifid spinous process

true

the denticulate ligaments are extensions of the _____ in the spine

pia mater

the ____ anchors the spinal cord to the coccyx

filum terminale

the cervical plexus arises from the ventral rami of _____

C2-C7

the deepest spinal muscle group is the _____

transversospinal group

the middle spinal muscle group is the ____

erector spinae group

the _____ is a thin transparent membrane that is attached to the inner surface of the dura mater

arachnoid mater

the central canal of the spinal cord contains cerebrospinal fluid but is ____ with the ventricles of the brain

continuous

the ____ comprises the external borders of the cord and is more abundant than gray matter

white matter

the ______ is centrally located and surrounds the central canal

gray matter

three vertical columns of the erector spinae muscle groups

\-iliocostalis layer (lateral)

\-longissimus layer (intermediate)

\-spinalis layer (medial)

there are ___ pairs of spinal nerves that exit the spinal cord

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