[The "tuning" mechanism of the segmental apparatus before voluntary movement].
The probability of motor unit discharges and changes in the inter-spike interval duration before the voluntary contraction were studied on m. soleus of human beings. A strong motoneuron facilitation was revealed 15-20 ms before the burst of potentials in EMG and only in some experiments a weak facilitation took place earlier (30-50 ms before the burst). So, "tuning" (H-reflex increasing) 60 ms before the voluntary contraction may be regarded as a result of H-reflex presynaptic disinhibition.
D004576:Electromyography; D006801:Humans; D009046:Motor Neurons / Q000502:physiology*; D012023:Reflex, Monosynaptic
O mekhanizme "nastroĭki" segmentarnogo apparata pered pered proizvol'nym dvizheniem.