Muscle fatuige

Question	Answer
Define Fatuige	Failure to maintain (or repeatedly) generate the required or expected force.
Define weakness	failure to generate the required or expected force on first testing or attempting a performance.
Give some sites of muscle fatigue. Break them into central and peripheral	Central: Excitatory input to the motor cortex, Excitatory drive to the lower motor neuron, motor neuron excitability. Peripheral: Neuromuscular transmission, Sarcolemma excitability, Contractile mechanism, Metabolic energy supply.
If we see an M wave during a muscle contraction, what sites of fatigue can we rule out?	Neuromuscular transmission, nerve and muscle membrain.
What do reactive oxygen species do when in our muscles?	They inhibit the Na+/K+ pump, therefore fatigue happens earlier.
M wave failure is seen when we give _____ stimulation.	prolonged
In a maximal contraction, the M wave _____ despite decreasing electrical stimulation.	Is maintained
How can we increase the time muscles are able to fire for by chancing muscle firing rate.	Decreased the firing rate to muscles.
Give a possible cause of central fatigue. Give some evidence for this.	Elevated core temperature. in Hyperthermic participants we see increases EMG but doesn't change performance in maximal sustained vol contraction. Maybe the muscle needs more stimulation for contraction to fuse at higher temperatures.

Resource summary

	Created by alexlpeart about 11 years ago