Steps before muscle contraction

Steps Before Muscle Contraction

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Steps Before Muscle Contraction

Henneman's Size Principle

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Motor Neuron Control

During Contraction

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Post Activation Potential

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Heinemann’s Size Principle

Heinemann’s size principle is recruiting small motor units to larger motor units to create more amount of force, this allows for greater control of muscles.

Relevance of a Motor Neuron in Motor Control

A motor neuron pool can be defined as all the alpha motor neurons that are collectively part of a muscle group, for example your biceps. This is relevant because the group of motor units can act as a single system with one output function. If they didn't act as a single system, the communication between the nervous system and the rest of the body.

Post Activation Potential

Post activation potential is when previous muscle contractions improve the next motor contraction, this causes alpha motor neurons to fire easier. This describes the ability of a muscle to contact following a previous contraction. For exercise performance, this is how muscles can opperate more efficeintly, as you do an exercise the better your muscles will be at remembering, which can lead to optimal exercise and even lifting heavier or running faster.

Motor Units Role in Muscle Contraction

The motor unit is made up of muscle fibers and is the basic structure of skeletal muscle. During muscle contraction, a motor unit is stimualted, the whole motor pool is stimulated. This produces force, and during exercise this is key for muscle production because the motor pool gets signals from the nervous system to contrsct.