Simultaneous Recordings of Scalp and Epidural Somatosensory-Evoked Responses in Man
Edward F. Domino, Shigeaki Matsuoka, Joseph M. Waltz, Irving S. Cooper
Abstract
Edward F. Domino, Shigeaki Matsuoka, Joseph M. Waltz, Irving S. Cooper
Abstract
The calvarium and scalp markedly attenuate the amplitude, but do not alter the latency or frequency, of somatosensory responses evoked by electrical stimulation of the contralateral median nerve in man. With scalp electrodes no significant potentials are obtained that are not also present in the epidural recordings when proper averaging techniques are used. The somatosensory-evoked response recorded with scalp electrodes in man appears to be the result of brain activity.
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The calvarium and scalp markedly attenuate the amplitude, but do not alter the latency or frequency, of somatosensory responses evoked by electrical stimulation of the contralateral median nerve in man. With scalp electrodes no significant potentials are obtained that are not also present in the epidural recordings when proper averaging techniques are used. The somatosensory-evoked response recorded with scalp electrodes in man appears to be the result of brain activity.
Key concepts: Scalp, Somatosensory evoked potential, Somatosensory system, Stimulation, Neuroscience, Medicine, Electrophysiology, Latency (audio)