NMS

7/7/99

Muscle Spindle

• Fig 11.8
• Afferentation from the heart
• Sclerotome pain
• Somatic/myofascial dysfunction—nodules
• Trigger points—muscle spindle stimulates, g , afferentation from anywhere (somatic or visceral)
• Afferentation starts CES
• Dorsal horn—sclerotome pain
• Ventral horn--g motor neuron to muscle tissue
• Muscle spindle is a mechanoreceptor sensitive to stretch
• GTO is sensitive to tension (not stretch)
• Spindle helps accept the new position of the muscle—as muscle shortens, the spindles readjust to that being normal, leads to muscle in a new position
• Never shorten a muscle
• Never contract a muscle going into spasm
• How do you get a spastic muscle back to normal tone?
• Static stretch does not necessarily do the job
• Could you send an inhibition message to the muscle spindle the g would quit firing leaving tension and the annulospiral would quit firing

1. ICA—isometric contraction of its antagonist

• Many things stimulate gamma

1. higher centers—stressed out leads to tighter muscles
2. reflexes—

Decrease excitation

1. adjustment
2. other tissue sites

Increase inhibition

1. ICA
2. Spray and stretch—high success rate, vaso-coolant spray (ice), low temp inhibits the spindle reflexes
3. Contract/relax/stretch
4. PNF

• Static stretch (passive) works well on postural muscles (extensors)

1. Facilitation of the lateral horn?
2. What reflex? S-V or V-V
3. Sclerotogenous pain? Dorsal pain
4. Sclerotome pain? C fibers
5. Anterior horn? Skeletal muscles—spasms
6. Sclerotogenous and radicular pain—both are segmental, r is easy to reproduce and in dermatomes, s is deep in tissue
7. Proprioception and nociception? Prop blocks noci
8. Dermatome and myotome? Radiculopathy
9. Sclerotogenous pain pattern? afferentation
10. 2 pain patterns? Derm and sclero
11. parasympatheticotonia? Upper cervical
12. 2 reflex to asthma? Parasympatheticotoina, sympatheticotonia
13. sypathetic atonia? Horner's
14. parasympathetic atonia? CNIII lesion
15. focal is orthopedic testing
16. Barry Wyke—somatosomatic (Sa-Se)
17. Facet capsule—starts for Wyke
18. Receptors—I, II, IV
19. EMG—nerve dysfunction
20. Emg and radiculopathy—myotome, segmental, nerve loss to a segment
21. Sclerotogenous pain and emg—normal