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21 Cards in this Set
- Front
- Back
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peripheral nerves contain axons from which two types of cells?
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-sensory neurons (afferent)
-motor neurons (efferent) |
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spinal cord forms what part of the CNS?
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the caudal part
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spinal cord segments
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8 cervical nerves
12 thoracic nerves 5 lumbar nerves 5 saccral nerves 1 coccygeal nerves total 31 pairs of spinal nerves |
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characteristics of myelinated axons in a peripheral nerve
axon size conduction velocity stimulus |
-large axon diameter
-fast conduction velocities -touch, vibration, motor |
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characteristics of unmyelinated axons in a peripheral nerve
axon size conduction velocity stimulus |
-small axon diameter
-slow conduction velocity -pain, cold, hot |
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myotome definition
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each muscle is supplied by a particular level/segment of the spinal cord and by its corresponding spinal nerve
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dermatome definition
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an area of skin innervated by a particular level/segment of the spinal cord and its corresponding spinal nerve
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inspiration
muscles used and associated segment of the spinal cord |
diaphragm
C3,4,5 |
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shoulder abduction
muscles used and associated segment of the spinal cord |
deltoid
C5 |
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elbow flexion
muscles used and associated segment of the spinal cord |
biceps brachii, brachialis
C5,6 |
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wrist extension
muscles used and associated segment of the spinal cord |
extensor carpi radialis longus and brevis
C6,7 |
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elbow extension
muscles used and associated segment of the spinal cord |
triceps brachii
C7, 8 |
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finger flexion
muscles used and associated segment of the spinal cord |
flexor digitorum superficialis and profundus
C8 |
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finger abduction and adduction
muscles used and associated segment of the spinal cord |
interossei
C8, T1 |
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thigh adduction
muscles used and associated segment of the spinal cord |
adductor longus and brevis
L2, 3 |
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knee extension
muscles used and associated segment of the spinal cord |
quadriceps
L3, 4 |
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ankle dorsiflexion
muscles used and associated segment of the spinal cord |
tibialis
L4, 5 |
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great toe extension
muscles used and associated segment of the spinal cord |
extensor hallucis longus
L5, S1 |
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ankle plantar flexion
muscles used and associated segment of the spinal cord |
gastrocnemius and soleus
S1, 2 |
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anal contraction
muscles used and associated segment of the spinal cord |
sphincter ani externus
S2, 3, 4 |
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dermatomes and myotomes used to ***** what?
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-voluntary movement
-proprioception -reflex movement -sensory responses |
