BPK 306 Lecture Notes - Lecture 23: Premotor Cortex, Muscle Fatigue, Basal Ganglia
30 Nov 2017
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Document Summary
Fatigue is a failure to maintain the required or expected force and can be due to central (cns) or peripheral (pns and muscle) causes. A method used for study of fatigue involves electrical stimulation of nerves at variable frequency this is used to cause controlled maximal or submaximal muscle contraction. Metabolic byproducts may be important in causing muscle fatigue: define muscular fatigue. Everyday language: a reduction in physical or mental performance. Increased effort required to maintain submaximal task: distinguish between central and peripheral fatigue. Failure to maintain the required or expected contractile response could be due to failure in any of the parts of the motor command pathway. If a peripheral nerve is stimulated and it is seen that muscle force increases -> fatigue is central. 2: need to stimulate a peripheral nerve (not the motorneruon, person is not outputting 100%/max force.
