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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