Document Detail

Intraoperative localisation of the lip sensory area by somatosensory evoked potentials.
MedLine Citation:
PMID:  15639417     Owner:  NLM     Status:  MEDLINE    
Accurate localisation of the central sulcus enables maximum tumour resection with minimum morbidity in peri-Rolandic surgery. We investigated intraoperative somatosensory evoked potentials (SSEPs) with combined recording of lower lip and median nerve stimuli during craniotomy in nine patients with peri-Rolandic glioma. Using a custom clip electrode, the lip mucous membrane was stimulated with biphasic pulses with 0.2 ms duration, 10-14 mA intensity and a frequency of 0.7 Hz. Polarity inversion of the SSEP was detected across the central sulcus using median nerve and/or lower lip stimulation in eight of the nine patients in whom the tumour did not infiltrate the lip or hand sensory area. Recording of SSEPs with lower lip stimulation is useful if the resection margin is planned lateral to the hand representation area, if the hand representation area is not exposed by the craniotomy, or if the SSEPs for median nerve stimulation are not clear due to tumour infiltration.
T Kumabe; N Nakasato; K Nagamatsu; T Tominaga
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia     Volume:  12     ISSN:  0967-5868     ISO Abbreviation:  J Clin Neurosci     Publication Date:  2005 Jan 
Date Detail:
Created Date:  2005-01-10     Completed Date:  2006-05-01     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9433352     Medline TA:  J Clin Neurosci     Country:  Scotland    
Other Details:
Languages:  eng     Pagination:  66-70     Citation Subset:  IM    
Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
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MeSH Terms
Brain Neoplasms / surgery
Electric Stimulation
Evoked Potentials, Somatosensory / physiology*
Glioma / complications,  surgery
Lip / innervation*
Median Nerve / physiology
Middle Aged
Monitoring, Intraoperative
Neurosurgical Procedures
Seizures / etiology,  surgery
Somatosensory Cortex
Tomography, X-Ray Computed
Trigeminal Nerve / physiology

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