Motor Units & Spatial Summation

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  • Created by: amyxx
  • Created on: 21-04-15 20:36

Motor Units & Spatial Summation:

Motor Unit - A motor neurone & its muscle fibres

All the motor neurones leading to skeletal muscles have branches each which leads to a junction with a single msucle fibre - Neuromuscular junction

Nerve impulses pass down a singular motor neurone & cause a contraction in all the muscle fibres.

All or nothing law - muscle fibres either contract (maximally) or do not contract; there is no such thing as a partial contraction

All firbres with a motor unit are the same type either fats or…


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