Spinal Cord And Nerves

Anatomy 
 
Created Oct 14, 2010
by m3l2121
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Side ASide B
divisions of the nervous system
central nervous system (CNS)peripheral nervous system (PNS)
central nervous system
brain and spinal cord
peripheral nervous system
all nerves other than brain and spinal cord
nucleus
find deffiniiton
ganglion
find deffintition
three types of cells
sensory neuronmotor neuroninter neuron
sensory neuron is found...
in dorsal roots
motor neurons are found...
in ventral roots
inter neurons are found...
in posterior horns
motor neurons go...
out of PNS to the glands
afferent
going in
efferent
going out
somatic sensory 
coming from body
visceral sensory
senses from organs
somatic motor
movement of body 
visceral motor
movement of organs
spinal cord is protected by
bonemeningescerebrospinal fluidfat
spinal cord is made up of 
white and gray matter
spinal nerves
31 pairsbranch off from intervertebral foramen
main functions of spinal cord
main section for reflexesinvolved in sensory and motor
meninges
(membrane) CT that wraps around spinal cord and brain
three layers of meninges
duraarachnoidpia
dura
most superficial layer-wraps around beginnings of spinal nerves-merges with epineurium of spinal...
epidural
outside space of duranot in brain
subdural
between dura and arachnoid
arachnoids
looks like a spider webmiddle layer
subarachnoid
between arachnoid and pialarger blood vesselsruns to level S2contains cerebrospinal fluid
pia
deepest layerhighly vascular
Gray matter
-H shaped-doesnt reach the end of the anterior part-has a canal in the center-gray...
posterior horns
cell bodies of sensorycell bodies of interneurondorsal roots
anterior horns
-cell bodies of motor-sends info out of spinal cord to muscles and glands-ventral roots

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