Neuronal adaptation of corticospinal mechanisms of muscle contraction regulation in athletes |
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Authors: | R N Fomin M V Selyaev |
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Institution: | 1.Russian State University of Physical Education, Sports and Tourism,Moscow,Russia |
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Abstract: | Adaptation changes in the corticospinal mechanisms of muscle contraction control in athletes were investigated. Using the
transcranial magnetic stimulation method, the parameters of motor evoked potentials of skeletal muscles of the lower limbs
during voluntary static loads of various intensities and durations were measured. Athletes, as compared to the reference group,
exhibited a greater increase in the maximal amplitude of the motor evoked potentials of the skeletal muscles of the lower
limbs, a smaller decrease in the central motor conduction time of nerve pulses and the peripheral period in electromyograms,
and a smaller increase in the cortical and segmental silent periods with increasing intensity and duration of isometric muscle
contractions. The mechanisms of adaptation of corticospinal regulation of human muscle contraction to specific conditions
of extreme motor activities are discussed. |
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Keywords: | |
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