motor neurons & units
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Last updated 2:39 PM on 4/2/26
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4 Terms
1
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motor unit
-one nerve fiber & all the muscle fibers innervated by it
-contract in unison (weak contraction)
-greatest tension →during tetanus
2
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muscle fibers of one motor unit
-dispersed throughout muscle
-contract in unison
- produce weak contraction over wide area
-provide ability to sustain long-term contraction
3
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small motor units
-provide a fine degree of control
-eye & hand muscles
4
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large motor units
-provide more strength than control
ex→ quadriceps femoris and gastrocnemius
