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Flashcards in Cord and Roots Deck (11)
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1

clark's nucleus

in intermediate zone
help spinal cord respond to lower limb proprio

2

large fast axon (fiber types)

Muscle spindles (Ia)
Golgi tendon (Ib)
touch, vibe, pressure (II, A-beta)

3

small slow axon (fiber types)

pain/temp (A-delta, C fibers)

4

small slow axon (fiber types)

pain/temp (A-delta, C fibers)
muscle = III, IV

5

Ia, Ib paths

DRG
some to dorsal column
some to ventral horn (reflexes)

6

II, A-beta paths

DRG
some to dorsal column
some to dorsal horn (suppress pain)

7

A-delta, C fiber paths

DRG
to dorsal horn

8

dorsal horn layout

flexors superior
extensors inferior
distal is lateral
proximal is medial

9

types of motor neurons

alpha (contract skeletal muscles)
gamma (make muscle spindles more sensitive to stretch)

10

types of motor neurons

alpha (contract skeletal muscles)
gamma (make muscle spindles more sensitive to stretch)

11

renshaw cells

inhibit alpha motor neurons
affected by tetanus (take up anteretrograde)
cause spasms/lockjaw