Lab on Da Spine Flashcards
Axon functions
to send instructions in the form of action potentials
what does the axon lack, what does it have instead
lacks nissl bodies
has neurofibrils
what is the name of the point of an axon where it spilts to 2
axon collateral
beginning of axon is called what
axon hillock
what are the spaces between schwann cells
nodes of ranvier
where are ions able to cross in a nerve cell
nodes of ranvier
where is action potential generated
in the nodes of ranvier
list how apinal nerves are ordered
C1-C8 cervical nerves
T1-T12 thoracic nerves
L1-L5 lumbar nerves
S1-S5 sacral nerves
Co1 coccygeal nerves
what are the 4 nerval plexi
cervical
brachial
lumbar
sacralw
what are the two spinal enlargements
cervical and lumbar
what do enlargements correspons to
limb innervations
what are plexi
interlacing networks of nerves
conus medularis def
tapered end of spinal cord
ends at t1
cauda equina def
collection of L1-Co1 spinal nerves
filum terminale def
strand of ct that anchors spinal cord to coccyx longitudinally
what are the 4 meniges of CT covering the CNS
deep most
Pia mater
Arachnoid mater
Subarachnoid space
Dura mater
Superficial
Denticulate ligaments def
CT strand that anchors spinal cord on sides and limits twisting movement
epidural space def
between dura mater and bone that is packed with fat tissue
dorsal root ganglion def
bump that contains cel bodies of sensory neurons
ventral gray horn is wider or narrower than the dorsal grey horn
wider
what neurons are in the dorsal horn
sensory
what neurons are in the ventral horm
motor
what neurons are in the lateral horn
motor neurons
what does the vental horm innervate
skeletal muscle
what does the laterla horn innervate
visceral organs
which meniges has CSF
subarachnoid space
what meninges are loose ct
pia meter and arachnoid mater
what meniges are dense irregular ct
dura mater
does white matter or gray matter have completed circles
white matter
