Neurophysiology of Fatigue

Decrease in the ability of muscle fibers to generate force, Decrease in the efficiency of neuromuscular synapses, Changes in the captivity of certain peripheral receptors, Changes in the patterns of firing of alpha-motoneurons, Psychological factors, Changes at any level of the hypothetical process if the generation of a motor command

Slowing of conduction velocity of muscle action potentials, Alteration of the excitation threshold to external stimulation, Slowing of the relaxation phase of a twitch contraction, Posttetanic depression of twitch force

Suppression of short latency reflexes (M1), Less pronounced depression of medium-latency reflexes (M2), No changes or even facilitation of long-latency reflexes (M3)

<p>Changes in the firing of the individual motor units (spectral changes, synchronization)</p> Signup and view all the answers

<p>Motivation</p> Signup and view all the answers

<p>Fatigue-induced changes in muscle activity, Fatigue-induced changes in the level of muscle activation</p> Signup and view all the answers

<p>force</p> Signup and view all the answers

<p>muscle</p> Signup and view all the answers

<p>reflexes</p> Signup and view all the answers

<p>muscle</p> Signup and view all the answers

<p>stretch</p> Signup and view all the answers

<p>units</p> Signup and view all the answers