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8 Cards in this Set
- Front
- Back
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what type of fibers do alpha motor neurons supply
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extrafusal fibers of skeletal muscle
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what type of fibers do gamma motorneurons supply
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intrafusal fibers of neuromuscular spindles
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what are interneurons
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link one neuron to another may converge signal on one neuron or disperse signal to many neurons for control
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what are renshaw interneurons
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glycergenic interneurons that are excited by collateral processes of excited alpah motorneurons. They act as the off switch inhibiting the alph motorneuron which excited them
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which tracts control the flexor motor system and fine movement
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corticospinal (lateral and anterior)
rubrospinal tectospinal |
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which tracts regulate antigravity muscles (extensors) posture and balance
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reticulospinal tract
vestibulospinal tract (lateral and medial) |
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what composes the upper motor system
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nerves from the cerebral cortex to the junction with inter and peripheral nerves
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what composes the lower motor system
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the interneurons and alpha motor neurons
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