Is the Mean Firing Rate versus Recruitment Threshold Relationship Linear?
نویسندگان
چکیده
منابع مشابه
Relationship between firing rate and recruitment threshold of motoneurons in voluntary isometric contractions.
We used surface EMG signal decomposition technology to study the control properties of numerous simultaneously active motor units. Six healthy human subjects of comparable age (21 +/- 0.63 yr) and physical fitness were recruited to perform isometric contractions of the vastus lateralis (VL), first dorsal interosseous (FDI), and tibialis anterior (TA) muscles at the 20, 50, 80, and 100% maximum ...
متن کاملRelationship between firing rate and recruitment threshold of motoneurons in voluntary 1 isometric contractions
25 We employed a surface electromyographic (EMG) signal decomposition technology to study the 26 control properties of numerous simultaneously active motor units. Six healthy human subjects of 27 comparable age (21 ± 0.63 yr) and physical fitness were recruited to perform isometric 28 contractions of the vastus lateralis (VL), first dorsal interosseous (FDI), and tibialis anterior (TA) 29 muscl...
متن کاملEffects of fatigue on motor unit firing rate versus recruitment threshold relationships.
INTRODUCTION The purpose of this study was to examine the influence of fatigue on the average firing rate versus recruitment threshold relationships for the vastus lateralis (VL) and vastus medialis. METHODS Nineteen subjects performed ten maximum voluntary contractions of the dominant leg extensors. Before and after this fatiguing protocol, the subjects performed a trapezoid isometric muscle...
متن کاملMuscarinic modulation of recruitment threshold and firing rate in rat oculomotor nucleus motoneurons.
Above recruitment threshold, ocular motoneurons (Mns) show a firing rate linearly related with eye position. Current hypothesis suggests that synaptic inputs are determinant for establishing the recruitment threshold and firing rate gain in these Mns. We investigated this proposal by studying the cholinergic modulation in oculomotor nucleus Mns by intracellular recordings in rat brain slice pre...
متن کاملGlutamate modulates the firing rate in oculomotor nucleus motoneurons as a function of the recruitment threshold current.
Studies in alert preparations have demonstrated that ocular motoneurons exhibit a phasic–tonic firing rate related to eye velocity and position, respectively. The slopes of these relationships are higher in motoneurons with higher recruitment threshold and have been proposed to depend upon synaptic input. To investigate this hypothesis, motoneurons of the rat oculomotor nucleus were recorded in...
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ژورنال
عنوان ژورنال: Medicine & Science in Sports & Exercise
سال: 2019
ISSN: 1530-0315,0195-9131
DOI: 10.1249/01.mss.0000561543.66674.69