Neurophysiology of Fatigue
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Questions and Answers

What are the potential contributors to fatigue according to applied neurophysiology?

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

What are the fatigue-induced changes within a muscle?

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

How does fatigue affect muscle reflexes?

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

What are the fatigue-induced changes in EMG spectrum?

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

What are the potential psychological factors contributing to fatigue?

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

How does fatigue impact the level of muscle activation?

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

Fatigue can lead to a decrease in the ability of muscle fibers to generate ______

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

Changes in the captivity of certain peripheral receptors lead to changes in their reflex effects due to fatigue-induced changes in ______

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

Fatigue-induced changes in muscle reflexes may result in the suppression of short latency ______

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

Slowing of the relaxation phase of a twitch contraction is one of the fatigue-induced changes within a ______

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

Fatigue-induced changes in the level of muscle activation can be influenced by changes in muscle response to ______

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

Fatigue can lead to changes in the firing of the individual Motor units, including spectral changes and synchronization of ______

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

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