Peripheral NS Flashcards
CN of PNS
I and II
Order of Nerve Naming
Nerve rootlet
Nerve Root
Spinal Nerve
Rami
Peripheral Nerve
Axoplasm
-transports nutrients and chemicals
-allows nerves to glide
-becomes viscous when stationary
A-Alpha Nerve Fibers
-fastest and thickest
-Muscle spindles and golgi, touch, MNs
Ia Nerve Fibers
-fastest and thickest
-muscle spindle
A-Beta Nerve Fibers
-2nd thickness and speed
-touch, muscle spindle
A-Gamma Nerve Fibers
-3rd thickest
-touch, pressure, gamma MNs
Ib Nerve Fibers
2nd-thickness
-golgi tendon organs
II Nerve Fibers
3rd thickest
-touch, muscle spindle (flowers)
III Nerve Fibers
-pain, crude touch, pressure, temp
A-delta Nerve Fibers
-pain, crude touch, pressure, temp
B Nerve Fibers
-preganglionic autonomic
C Nerve Fibers
-slowest, thinnest
-pain, crude touch, pressure, temp
-postganglionic autonomic
IV Nerve Fibers
-Slowest, thinnest
-pain, crude touch, pressure, temp
Cervical Plexus
-C1-C4
Lumbar Plexus
-L1-L4
Sacral Plexus
-L5-S4
Peripheral Neuropathy
-any disease of peripheral nerves
Mononeuropathy
-single nerve involvement
Traumatic Myelinopathy:
-repeated mechanical pressure and myelin gets damaged
-carpal tunnel
Traumatic Axonopathy:
-crush injury or fracture
-can regrow if schwann and myelin remain (1mm/day)
Severance:
-poor prognosis
-wallerian degeneration within 3-5dy
Polyneuropathy
-symmetric involvement
-distal to proximal distribution
Small fibers:
-pain, temp, numb loss
Large fibers:
-ataxia, proprioception loss
Guillain-Barre Syndrome
-acute inflammatory demyelinating polyradiculoneuropathy
-occurs after viral infection
-motor issues
-can recover
