ANAT30007 Lecture Notes - Lecture 2: Negative Feedback, List Of Flexors Of The Human Body, Golgi Tendon Organ
24 Jun 2018
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Swing: leg not supporting weight is flexed to clear the ground, swung across, then
extended to take over weight
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Stance: leg takes all body weight - needs strong extensor muscles for support
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Swing and stance kind of correlates with flexion and extension
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Gait cycle
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Spinal lesion doesn’t prevent pattern generation - pattern generator is in spinal cord
and so maintains pattern
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Cat can even increase locomotor speed when treadmill speed is increased - due to
sensory info from environment to the limb
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Spinal cord receives sensory input that controls gait pattern
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After spinal transection, cats can still generate patterned locomotor output
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The muscle spindle - muscle sense
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Modulation by muscle sensory signals - peripheral sensory feedback
Locomotor Page 6
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Numerous spindles throughout muscle constantly convey info to spinal cord on
length/stretch of muscle
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Negative feedback regulation of muscle length by muscle spindles
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In the tendon
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No relation to length of muscle
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Golgi tendon organ - force detector
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Locomotor Page 7
