Lab Test 6 Flashcards
(24 cards)
Anterior median fissure
partially divides in half
cauda equina
roots that extend beyond spinal cord
cervical enlargement
enlargement in cervical region
conus medullaris
end of spinal cord
epidural space
space between vertebral column and spinal dural sheath, fat and veins
gray matter
unmyelinated cell bodies and neuroglia
gray commissure
gray matter surrounding the central canal
anterior/ventral horn
contains cell bodies and somatic motor neurons
lateral horn
cell bodies of visceral motor neurons
posterior/dorsal horn
interneurons receiving somatic and visceral input from sensory neurons
white columns/funiculi
myelinated and unmyelinated nerve fibers that allow communication between different parts of the spinal cord and the brain.
dorsal root
sensory axons
dorsal root ganglion
cell bodies of sensory neurons
dorsal rami
innervates posterior body truck
ventral rami
innervates body trunk, arms, and legs
gray rami communicantes
postganglionic axons pass from sympathetic chain ganglia to the ventral ramus
white rami communicantes
preganglionic axons pass from the ventral ramus to the sympathetic chain ganglia
cervical plexus
inncervates skin of neck, posterior head, and shoulders
phrenic nerve
innervates diaphragm
brachial plexus
innerves shoulders and arms
lumbar plexus
innervates posterior and median thigh, abdominal wall
sacral plexus
innervates pelvic region, perineum, most lower limb
sciatic nerve
largest branch of sacral plexus, innervates entire lower limb except antereomedial thigh
intercostal (thoracic) nerves
No plexus, innervates intercostals, thorax, and most of the abdominal wall
