Publication Date:
1978-01-06
Description:
The human brain is found to produce a magnetic field near the scalp which varies in synchrony with periodic electrical stimulation applied to a finger. Use of a highly sensitive superconducting quantum interference device as a magnetic field detector reveals that the brain's field is sharply localized over the primary projection area of the sensory cortex contralateral to the digit being stimulated. The phase of the response at the stimulus frequency varies monotonically with the repetition rate and at intermediate frequencies yields a latency of approximately 70 milliseconds for cortical response.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Brenner, D -- Lipton, J -- Kaufman, L -- Williamson, S J -- New York, N.Y. -- Science. 1978 Jan 6;199(4324):81-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physics, New York University, New York, NY 10003, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17569490" target="_blank"〉PubMed〈/a〉
Keywords:
Adult
;
Brain/*physiology
;
Brain Mapping
;
Electric Stimulation
;
*Electromagnetic Fields
;
Fingers
;
Humans
;
Male
;
Reaction Time
;
Thumb
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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