lecture 4 PNS Flashcards
Peripheral Nervous System Somatic Division
PNS provides the CNS with sensory information, CNS then tells the PNS what to do.
somatic = voluntary
2 anatomical divisions of PNS
cranial nerve
spinal nerve
two subdivisions of PNS
somatic- voluntary- muscles (somite derived tissues)
autonomic- involuntary -visceral structures
ANS has three subdivisions
parasympathetic
sympathetic
Enteric
Make up of vertebral column
C1-7
T1-13
L1-7
Sacrum 1-6
Brachial Plexus is which nerves
C6-T1-2
lumbarsacral plexus is what nerves
L4 to S3
dorsal branch is a ___ nerve
mixed
ventral branch is a ___ nerve
mixed
ramus communicans is a ___ nerve
mixed
dorsal root is a ____ nerve
sensory
from body to brain
ventral root is a ___ nerve
motor
brain to body
dorsal root ganglion is on ___ nerves
sensory
off spinal cord before it becomes the ventral ramus/branch (mixed nerve)
dorsal root ganglion branch into
dorsal rootlets
a nerve is a ___ wrapped in ___
bunch of axons
epinerium