L03 Neurophysiology II: The Action Potential Flashcards Preview

Brain and Behaviour > L03 Neurophysiology II: The Action Potential > Flashcards

Flashcards in L03 Neurophysiology II: The Action Potential Deck (12):
1

what is the neurophysiology of multiple sclerosis?

demyelination of CNS axons

2

what is the neurophysiology of guillain-barreé syndrome?

demyelination of PNS axons

3

how does lidocaine work as a local anesthetic?

it binds to the inside of VG Na+ channels so it needs to enter through open channels first to access the binding site. thus, it selects for fibres with the most open VG Na channels. these are most common in thin, unmyelinated pain fibres.

4

physical location of C6 dermatome?

thumb

5

physical location of C7 dermatome?

middle finger

6

physical location of C8 dermatome?

pinky

7

innervation of ulnar nerve?

pinky, medial side of ring finger

8

innervation of median nerve?

palmar side: thumb, index, middle, lateral ring
dorsal side: thumb, index

9

innervation of radial nerve?

thenar muscle area of palm

10

what's the C3-C5 group for?

phrenic nucleus

11

what's the T1-L2 group for?

sympathetic preganglionic neurons for visceral function and skin regulation

12

what's the S2-S4 group for?

parasympathetic innervation of pelvic splanchnic organs. origin of pudendal nerve for external anal and urethral sphincters