Biomaterial Database

Variability of the interimpulse intervals of motor units upon voluntary activation. 1982

Iu T Shapkov, and D Kozarov

Twenty subjects were investigated for voluntary control of separate motor units (MU) in the biceps brachii muscle under visual and auditory feedback. After 20-fold repetition of the task for sustaining stable firing frequency it turned out that in every trial the frequency was different and the variability of the interimpulse intervals changed in an unexpected way. It increased with the lengthening of the interimpulse intervals, but in an uneven manner. There appeared a decrease of the variability at steps of about 20 ms. A supraspinal excitatory input, rhythmically acting, is supposed to be the cause of this unevenness.

UI	MeSH Term	Description	Entries
D009046	Motor Neurons	Neurons which activate MUSCLE CELLS.	Neurons, Motor,Alpha Motorneurons,Motoneurons,Motor Neurons, Alpha,Neurons, Alpha Motor,Alpha Motor Neuron,Alpha Motor Neurons,Alpha Motorneuron,Motoneuron,Motor Neuron,Motor Neuron, Alpha,Motorneuron, Alpha,Motorneurons, Alpha,Neuron, Alpha Motor,Neuron, Motor
D009132	Muscles	Contractile tissue that produces movement in animals.	Muscle Tissue,Muscle,Muscle Tissues,Tissue, Muscle,Tissues, Muscle
D011930	Reaction Time	The time from the onset of a stimulus until a response is observed.	Response Latency,Response Speed,Response Time,Latency, Response,Reaction Times,Response Latencies,Response Times,Speed, Response,Speeds, Response
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000200	Action Potentials	Abrupt changes in the membrane potential that sweep along the CELL MEMBRANE of excitable cells in response to excitation stimuli.	Spike Potentials,Nerve Impulses,Action Potential,Impulse, Nerve,Impulses, Nerve,Nerve Impulse,Potential, Action,Potential, Spike,Potentials, Action,Potentials, Spike,Spike Potential
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D001676	Biofeedback, Psychology	The therapy technique of providing the status of one's own AUTONOMIC NERVOUS SYSTEM function (e.g., skin temperature, heartbeats, brain waves) as visual or auditory feedback in order to self-control related conditions (e.g., hypertension, migraine headaches).	Biofeedback (Psychology),Bogus Physiological Feedback,False Physiological Feedback,Feedback, Psychophysiologic,Biofeedback,Feedback, Psychophysiological,Myofeedback,Psychophysiologic Feedback,Biofeedbacks,Biofeedbacks (Psychology),Biofeedbacks, Psychology,Bogus Physiological Feedbacks,False Physiological Feedbacks,Feedback, Bogus Physiological,Feedback, False Physiological,Feedbacks, Bogus Physiological,Feedbacks, False Physiological,Myofeedbacks,Physiological Feedback, Bogus,Physiological Feedback, False,Physiological Feedbacks, Bogus,Physiological Feedbacks, False,Psychology Biofeedback,Psychology Biofeedbacks