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Flashcards in Nerve Fibers Deck (15):
1

What is the axon classification based on size called?

Erlanger - Gasser

2

What is the name of the classification system for sensory root nerves?

Llyod - Hunt

3

What is thel diameter and speed of conduction of an A-alpha fiber?

Diameter: 13 - 20 um
Speed: 80 - 120 m/sec

4

What is the diameter and speed of conduction of an A-beta fiber?

Diameter: 6 - 12 um
Speed: 35 - 75 m/sec

5

What is the diameter and speed of conduction of an A-delta fiber?

Diameter: 1 - 5 um
Speed: 5 - 30 m/sec

6

What is the diameter and speed of conduction of a C fiber?

Diameter: 0.2 - 0.05 um
Speed: 0.5 - 2 m/sec

7

What do A-alpha fibers innervate?

- Extrafusal muscle

8

What do A-beta fibers innervate?

- Extrafusal and intrafusal muscle fibers

9

What do A-gamma fibers innervate?

- Intrafusal muscle fibers

10

What do B and C fibers innervate?

- Preganglionic and post ganglionic fibers

11

What do Ia fibers innervate?

- Primary afferent of muscle spindles

12

What do Ib fibers innervate?

- Golgi tendon organs

13

What do II fibers innervate?

- Secondary afferents of muscles spindles
- Touch and pressure receptors
- Pacinian corpuscles (vibration)

14

What do III fibers innervate?

Small, lightly myelinated fibers for:
- Touch and pressure
- Pain
- Temperature

15

What do IV fibers innervate?

- Pain and temperature receptors