Kinesiology 1080A/B Lecture Notes - Lecture 3: Alpha Motor Neuron, Wobble Board, Muscle Spindle

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Lesson #3: neuroscience (combining structure with behaviour) Explains why phenomenon such as walking and reaching. Final common path at the spinal cord produce muscular contraction. Example: when you slip (i. e. , foot goes forward, muscle of that leg is lengthened = intrafusal muscle fibres. Output from intrafusal muscle cords is synapsing onto an alpha motor neuron (excitation of the neuron leads to contraction of the stretched muscle) Elderly"s muscle spindles take longer to become excited (poor/diminished reflex or proprioceptive loop: wobble board retrains postural support mechanism. Left side of brain controls right side of body, right side of brain controls left side of body. Example: sit to stand stroke: reciprocal inhibition on the left side of the body is gone (co-contraction is occurring) = right side of brain has had the stroke, physical education.