Card Set Information
csn 223 larson biol spinal cord anatomy
spinal cord anatomy
layers that comprise the spinal meningies
dura mater,subdural layer,arachnoid mater(thin delecate),subarachnoid space, pia mater
what protects the spinal cord
vertebrae,meningies,epideral spac(between the vertebra and dura mater)
how many segments does the spinal cord contain?
how far into the vertebral column does the spinal cord extend
whats the purpose of the filum terminale?
spinal cord 2 coccyx
how many pairs of spinal nerves are there
why does the cervical and lumbar enlargments exsist
more nerve fibers and cross section anatomy
how is grey matter arranged in spinal cord
towards the center, arranged into horns(anterior lateral and posterior)
how is white matter arranged in spinal cord
-arranged into columns(also called funiculus)
whats the purpose of sensory and motor nuclei that r within the gray matter?
sensory nuclei 1) somatic -tactile sensations 2)visceral-info from organ systems INFO RECEPTORS -> BRAIN
what is the purpse of sensory and motor nuclei that r within white matter?
motor nuclei visceral-motor commands to organ system
somatic-motor command skeletal system BRAIN-> EFFECTOR
what types of neurons go thru dorsal root?
sensory neurons merge to form spinal cord with dorsal root
types of neurons thru ventricle root
carries motor neurons form spinal cord with dorsal root
dorsal root and ventricle root merge to form what?"
dorsal root ganglion
what does the dorsal root ganglion contain?
contains cell body of the unipolar sensory neurons
why is there a dorsal root ganglion but not a ventricle root ganglion?
motor neurons r multi polar. cellbody is in grey matter
what is the arrangment of anterior,posterior,and lateral white columns?
from skin and muscles from back receptor-> dorsal ramus-> dorsal root-> spinal dorsal
sensory info from limbs and ventricle body wall -> receptor->ventral ramus-> dorsal root->spinal cord
what info is carried in the ascending tracts and descending tracts?
ascending is sensory info and descending motor commands
difference between faciculus and fasciculus
faciculus is a bundle of nerve fibers and fasciculus a bundle of muscle fibers