Flashcards
KIN 313— Pre programmed response and CPG (central pattern generator)
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Evidence of CPGs in humans
Evidence of CPGs in humans
when ~8month old baby is held for balance support on treadmill (not yet knowing how to walk independently), as treadmill moves, baby is seen to produce rhythmic, locomotive movements
=evidence that scaffold for locomotion exists in spinal cord even at this time and although baby doesn't consciously know what it's doing, its spinal cord knows
importance of sensory feedback (4)
importance of sensory feedback (4)
1. initiating walking (brush cat on back, begins to walk)
2. controlling phase transitions= stance to swing
3. regulating level of muscle acitivty = shifting to stand on one leg
4. correcting unexpected disturbances = such as stumbling responses such as when slipping
controlling phase transitions mechanism
controlling phase transitions mechanism
swing begins with flexion of the knee, hip and ankle flexors
- then midway, as body weight begins to transfer, knee and ankle begin to extend via unloading of extensor muscles
as leg moves ahead of the body, there is anticipation of weight about to be bared
- these proprioceptive inputs can initiate walking
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