Motor units in finger
Nettet1. jan. 1991 · 1. Cross-correlation analysis was performed on the discharges of motor units recorded from the same or from different finger muscles during weak, voluntary … NettetIf a muscle is required for fine control or for delicate movements (e.g., movement of the fingers or hands), its motor units will tend to have small innervation ratios. That is, each motor neuron will innervate a small number of muscle fibers (10-100), enabling many nuances of movement of the entire muscle.
Motor units in finger
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Nettet5. apr. 2024 · Lulic-Kuryllo T, Inglis JG (2024) Sex differences in motor unit behaviour: A review. J Electromyogr Kinesiol 66:102689. Article PubMed Google Scholar Madarshahian S, Latash ML (2024) Synergies at the level of motor units in single-finger and multi-finger tasks. Exp Brain Res 239:2905–2923 Nettet4. mai 2005 · Short-term synchrony was measured for pairs of motor units located within and across muscles activated during a task that mimicked precision grip in the dominant and nondominant hands of human subjects. Surprisingly, synchrony for pairs of motor units residing in separate muscles (flexor pollicis longus, a thumb muscle, and flexor …
Nettet1. jul. 2000 · This fits well with the mean value of 39.3 % for the slow motor units (Group I) in the long finger flexors of the human hand, despite these units reaching a much higher level of maximum force production (Fuglevand et al. 1999). Maximum contraction and relaxation rates were normalised to twitch force to allow an ensemble response to be … Nettet26. mai 1972 · Experiments were carried out on human subjects to investigate whether they could voluntarily isolate motor units in finger muscles, ... Territory of single motor unit potentials in m. opponens pollicis and m. abductor pollicis brevis extends longitudinally from the proximal to the distal end of the muscles, ...
NettetSmall motor units are also involved in the many fine movements of the fingers and thumb of the hand for grasping, texting, etc. ... The small motor units in the muscle will have smaller, lower-threshold motor neurons that are more excitable, firing first to their skeletal muscle fibers, which also tend to be the smallest. Nettet15. sep. 2007 · Activity in FPL motor units commonly loaded the index finger (42/55 units), but less commonly the other fingers (P < 0.001). On average, these motor …
Nettet26. mai 1972 · BRAIN RESEARCH 345 VOL1TIONALLY CONTROLLED SINGLE MOTOR UNITS IN HUMAN FINGER MUSCLES MASAMICHI KATO AND JUN TANJI Department of Physiology, Hokkaido University School of Medicine, Sapporo (Japan) (Accepted November 16th, 1971) I NTRODUCTION As early as the 1940s it had been recognized …
Nettet15. aug. 2005 · The finger on which the unit principally acted was defined as the 'test finger' and that which flexed isometrically was the 'active' finger. Activity in 79 units … mechanical hyperalgesiaNettet22. mai 2014 · From our prior understanding of the force–velocity properties of single fibres and muscle containing predominately fast or slow motor units, we predicted that the force–velocity relationship would be the same when all motor units were activated and fast motor units were selectively activated, but that shortening velocity would be lower … mechanical hysteresis definitionNettet10. okt. 2024 · [35] Fuglevand A J, Winter D A and Patla A E 1993 Models of recruitment and rate coding organization in motor-unit pools J. Neurophysiol. 70 2470–88. Crossref Google Scholar [36] Hu X, Rymer W Z and Suresh N L 2012 Motor unit pool organization examined via spike-triggered averaging of the surface electromyogram J. Neurophysiol. … mechanical hvac systems incNettet18. nov. 2024 · However, most current finger motion classification models are subject-specific, requiring calibration when applied to new subjects. Generalized subject … mechanical hygrometerNettet1. jan. 1991 · 1. Cross-correlation analysis was performed on the discharges of motor units recorded from the same or from different finger muscles during weak, voluntary isometric contractions in man. 2. In 88% of cases such cross-correlograms contained a narrow central peak indicating synchronization between the firing of the contributory … mechanical hygrostatNettetmost no motor unit synchronization could be detected in the dominant extensor carpi radialis muscle compared with strong motor unit synchronization in the same muscle … mechanical hvac systems riNettet7. mar. 2013 · motor unit: [noun] a motor neuron together with the muscle fibers on which it acts. mechanical hysteresis