We studied the effects of hyperventilation under control of the end-tidal PCO2, on the electromyographic silent period evoked by transcranial magnetic brain stimulation and by peripheral nerve stimulation. We also studied the effects of hyperventilation on the threshold, latency and amplitude of motor potentials. Hyperventilation significantly reduced the duration of the cortical silent period, but did not affect the length of the peripheral silent period. Neither did it alter the latency, amplitude or threshold of the motor potentials. These findings suggest that hyperventilation selectively depresses motor cortical inhibition in humans.
THE EFFECT OF HYPERVENTILATION ON MOTOR CORTICAL INHIBITION IN HUMANS - A STUDY OF THE ELECTROMYOGRAPHIC SILENT PERIOD EVOKED BY TRANSCRANIAL BRAIN-STIMULATION / A. PRIORI, A. BERARDELLI, B. MERCURI, M. INGHILLERI, M. MANFREDI. - In: ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY. ELECTROMYOGRAPHY AND MOTOR CONTROL. - ISSN 0924-980X. - 97:1(1995), pp. 69-72.
THE EFFECT OF HYPERVENTILATION ON MOTOR CORTICAL INHIBITION IN HUMANS - A STUDY OF THE ELECTROMYOGRAPHIC SILENT PERIOD EVOKED BY TRANSCRANIAL BRAIN-STIMULATION
A. PRIORI;
1995
Abstract
We studied the effects of hyperventilation under control of the end-tidal PCO2, on the electromyographic silent period evoked by transcranial magnetic brain stimulation and by peripheral nerve stimulation. We also studied the effects of hyperventilation on the threshold, latency and amplitude of motor potentials. Hyperventilation significantly reduced the duration of the cortical silent period, but did not affect the length of the peripheral silent period. Neither did it alter the latency, amplitude or threshold of the motor potentials. These findings suggest that hyperventilation selectively depresses motor cortical inhibition in humans.
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