Nervous System - Spinal Cord & Nerves Flashcards
(16 cards)
Spinal cord external anatomy
Start, end, made of
Start - foramen magnum
end - L1/L2
conus medullaris, filus terminale, cauda equina
conus medullaris
tapered, cone-like end, non-neural
filus terminale
fibrous, non-neural, from conus medullaris to spinal cavity end (coccyx)
cauda equina
L2 to coccygeal vertebrae
white matter
outer layer of spinal cord
surrounds grey matter, myelinated axons running up and down
grey matter
inner h shape of spinal cord
dorsal horn
posterior, sensory of spinal cord
ventral horn
anterior, motor of spinal cord
central canal
inside grey matter, csf filled
dorsal root
carries sensory signals into spinal cord
ventral root
carries motor signals out of spinal cord
spinal nerve
both sensory and motor
branches of spinal nerve and their target locagtions
dorsal ramus - back muscles & skin
ventral ramus - front body & limbs
epinerium
around entire nerve
perinerium
around entire fasicle
endonerium
around individual axon
