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3 Cards in this Set
- Front
- Back
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Sensory Nerve Fiber Classification
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Proprioreception
1. Ia: large diam, fast conduct velocity, fxn: muscle spindle (heavy myelin) 2. Ib: large diam, fast conduct velocity, fxn: golgi tendon organ (heavy myelin) 3. II: medium diam, med. veloc, secondary muscle spindle Superificial Touch 1. A-beta: med diam, med. vel fxn: prim cutaneous receptor 2. A-delta: small diam & slower conduc. vel fxn: cutaneous mechanorecept (light myelin / pain) 3. C fibers: very small diam,very slow, unmyelinated fxn: cutaneous & joint afferent (pain) |
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Myotome
Dermatome |
M: ventral roots, innervate specific muscle
D: dorsal roots, body part assoc w/ specific vertebral segment |
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Important Body Dermatomes
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C2: highest (JUST MOTOR), back of head
C6: thumb C7: index & middle finger C8: lateral aspect of hand T4: nipple line T10: umbilical cord line S2: groin region L4: great toe S5: lowest dermatome, peri-anal region, if intact then there still SC fxn in body |
