Spinal Nerves Unit 5 Flashcards
Anterior (ventral or motor) roots
efferent axons from cell bodies located in the anterior (ventral) or lateral (if present) horns
preganglionic autonomic
sym T1-L2
para S2-S4
. Posterior (dorsal or sensory) roots
located in the posterior root (dorsal root) (spinal
ganglion
Spinal ganglia are typically located…
inside or just medial to the intervertebral foramen, beyond the dura mater
Spinal ganglia exceptions
C1 and C2 ganglia
sacral ganglia located within vertebral canal
coccygeal located inside dura mater
cauda equina composed of what Spinal ganglia
sacral & coccygeal ganglia
cell bodies for these fibers sympathetic chain ganglia
postganglionic sympathetic fibers
Mixed spinal nerves give off …
ascending, descending and transverse branches
Mixed spinal nerve
Provide somatosensory and sympathetic supply to the dura, blood vessels, periosteum,
ligaments and intervertebral discs in the anterior and lateral portions of the canal
Posterior (dorsal) rami are smaller than anterior except in …
except C1, S4 and S5