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rdf:type |
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lifeskim:mentions |
umls-concept:C0013790,
umls-concept:C0024488,
umls-concept:C0026607,
umls-concept:C0035647,
umls-concept:C0036270,
umls-concept:C0442828,
umls-concept:C0456904,
umls-concept:C0563532,
umls-concept:C1185740,
umls-concept:C1513492,
umls-concept:C1516438,
umls-concept:C1705994,
umls-concept:C1948023,
umls-concept:C2003851
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pubmed:issue |
7
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pubmed:dateCreated |
1991-10-24
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pubmed:abstractText |
Activity in descending motor pathways after scalp electrical and magnetic brain stimulation of the motor cortex was recorded from the exposed cervico-medullary junction in six patients having trans-oral surgery of the upper cervical spine. Recordings during deep anaesthesia without muscle paralysis revealed an initial negative potential (D wave) at about 2 ms with electrical stimulation in five of the six patients. This was followed by a muscle potential which obscured any later waveforms. Magnetic stimulation produced clear potentials in only one patient. The earliest wave to magnetic stimulation during deep anaesthesia was 1-2 ms later than the earliest potential to electrical stimulation. Following lightening of the anaesthetic and the administration of muscle relaxants a series of later negative potentials (I waves) were more clearly seen to both electrical and magnetic stimulation. More I waves were recorded to magnetic stimulation during light anaesthesia than during deep anaesthesia. Increasing the intensity of electrical stimulation also produced an extra late I wave. At the highest intensity of magnetic stimulation the latency of the earliest potential was comparable to the D wave to electrical stimulation. The intervals between these various D and I waves corresponded to those previously described for the timing of single motor unit discharge after cortical stimulation.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-1697531,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2213580,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2213581,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2385364,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2489409,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2552023,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-2832547,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3288403,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3574763,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3579225,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3801845,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3947036,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-3958738,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-4293134,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-5883736,
http://linkedlifedata.com/resource/pubmed/commentcorrection/1654395-6856067
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:status |
MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
0022-3050
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:volume |
54
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
618-23
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pubmed:dateRevised |
2009-11-18
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pubmed:meshHeading |
pubmed-meshheading:1654395-Adult,
pubmed-meshheading:1654395-Aged,
pubmed-meshheading:1654395-Cervical Vertebrae,
pubmed-meshheading:1654395-Efferent Pathways,
pubmed-meshheading:1654395-Electric Stimulation,
pubmed-meshheading:1654395-Electromagnetic Fields,
pubmed-meshheading:1654395-Evoked Potentials, Somatosensory,
pubmed-meshheading:1654395-Female,
pubmed-meshheading:1654395-Hand,
pubmed-meshheading:1654395-Humans,
pubmed-meshheading:1654395-Male,
pubmed-meshheading:1654395-Medulla Oblongata,
pubmed-meshheading:1654395-Middle Aged,
pubmed-meshheading:1654395-Monitoring, Intraoperative,
pubmed-meshheading:1654395-Motor Cortex,
pubmed-meshheading:1654395-Motor Neurons,
pubmed-meshheading:1654395-Muscle Contraction,
pubmed-meshheading:1654395-Muscles,
pubmed-meshheading:1654395-Pons,
pubmed-meshheading:1654395-Spinal Cord,
pubmed-meshheading:1654395-Spinal Cord Compression,
pubmed-meshheading:1654395-Spinal Diseases,
pubmed-meshheading:1654395-Synaptic Transmission
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pubmed:year |
1991
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pubmed:articleTitle |
Intra-operative recording of motor tract potentials at the cervico-medullary junction following scalp electrical and magnetic stimulation of the motor cortex.
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pubmed:affiliation |
MRC Human Movement and Balance Unit, University Department of Clinical Neurology, National Hospitals for Neurology and Neurosurgery, London, UK.
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pubmed:publicationType |
Journal Article
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