Elsevier

Brain Research

Volume 160, Issue 1, 5 January 1979, Pages 159-162
Brain Research

Rhythmic properties of motoneurones innervating muscle fibres of different speed in m. gastrocnemius medialis of the cat

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    Citation Excerpt :

    For each motor unit type the steep parts of the force-frequency curves corresponding to unfused tetanic contractions were observed at lower stimulation frequencies in cats than in rats [26]. The difference correlates with a lower firing rate of cat motoneurons in relation to rats because the steep part of a curve corresponds to a frequency range of motoneuronal firing [27]. Moreover, within each of two populations of the motor units very strong correlations were found between the contraction time and the firing frequency, corresponding to 60% of the maximum tetanic force [26].

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