KIN 121 Lecture Notes - Lecture 12: Stretch Reflex, Golgi Tendon Organ, Semicircular Canals
16 Dec 2015
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Document Summary
Tells us where our body in]s in space. Tells us where are body parts are relative to our body: muscle spindle: Muscles provide force: to move levers. Muscles are driven by neural impulses which can be: volitional, reflexive. Muscle force can be neurally enhanced: increasing stimulation frequency, recruiting more motor units, synchronizing the firing of motor units, reducing inhibitory firing, increasing amount of contractile protein (hypertrophy, the opposite is atrophy, i. e. sliding filament theory. Muscle force can also be enhanced by: And we know muscle contraction needs neural drive: voluntary or reflexive contraction. Beside neural drive, muscles also need energy in order to contract: Energy stored in high energy phosphates: primarily adenosine triphosphate (aka atp) Motor unit= 1 motor neuron and muscle fibres it innervates. St motor neurons innervate st muscle fibres, ft neurons innervate ft muscle. Neural impulse (ap) travels down motor neuron to neuromuscular junction (motor. Ap travels over the sarcolemma and through the t-tubules.
