Test Two Flashcards
1
Q
PNS
A
all the nerves distal to the spinal nerves
2
Q
Somatic Division of PNS
A
- voluntary
- allows us to react to the environment
- spinal nerves + cranial nerves
3
Q
Autonomic/Visceral Division of PNS
A
- involuntary
- maintains internal homeostasis
- sympathetic: fight or flight
- parasympathetic: rest and digest
4
Q
Endoneurium of Spinal Nerves
A
- separate individuals axons
5
Q
Perineurium of Spinal Nerves
A
- surrounds bundles of axons (fasicles)
6
Q
Epineurium of Spinal Nerves
A
- encloses entire nerve trunk
7
Q
Spinal Nerve Structure
A
- spinal nerve = dorsal and ventral roots
8
Q
Outside the spinal column, the spinal nerve bifurcates into…
A
- Dorsal (poserior) rami
- Ventral (anterior) rami
- Each rami has smaller muscular and cutaneous branches
9
Q
Classification of Peripheral Nerves
A
- By Velocity Letters (afferent + efferent): A: large, myelinated (fastest) B: small, myelinated C: unmyelinated Roman Numerals (afferent only) I (fastest) - IV (slowest)
10
Q
Plexes
A
- Nerve Network
- formed from junctions of the anterior (ventral) rami
11
Q
Cervical plexus
A
C1 - C4
12
Q
Brachial Plexus
A
C5 - T1
- Innervates the entire upper limb
13
Q
Lumbar Plexus
A
L1 - L4
14
Q
Sacral Plexus
A
L4 - S4
15
Q
Major nerves of hand and arm
A
Musculotaneous
Median
Ulnar
Radial