Question | Answer |
white matter | nerve fibers, axons |
gray matter | neurons |
conus medullaris | end of spinal cord (usually between LV1 and LV2) |
dorsal root ganglia | collection of neuronal cell bodies outside of CNS |
dorsal root | SENSORY; has rootlets |
ventral root | MOTOR |
spinal nerve | MIXED; divides into ventral primary ramus and dorsal ramus |
these are caudal to the conus medullaris | ventral and dorsal roots |
all plexuses are made up of... | ventral primary rami |
innervate all muscles of upper limb and skin of upper | ventral primary ramus |
cauda equina | ventral and dorsal roots caudal to the conus medullaris |
epidural space | space between dura and bone (vertebra) |
contains FAT and VENOUS blood vessels | epidural space |
this is caudally continuous to the level of sacral vertebra 2 | dura mater |
beyond SV2 this is continuous as the coccygeal ligament | dura mater |
subdural space | space between dura and arachnoid |
this contains cerebral spinal fluid (CSF) | subarachnoid space |
dermatome | area of skin innervated by 1 spinal nerve |
shingles follow this pattern | dermatomal |
the brain does not have this, only found in spine | epidural space |
filum terminale pia | extends to S2 to dura/arachnoid |