Korean J Anesthesiol.  1996 Jan;30(1):88-92. 10.4097/kjae.1996.30.1.88.

Electrmyographic Responses Evoked by Electrocortical Stimulations under Various Anesthetics: A case report

• Kang SH
• Min KT
• Shin YS

• KMID: 2237822
• DOI: http://doi.org/10.4097/kjae.1996.30.1.88

Abstract

Motor evoked potentials(MEP) have been recently introduced as intraoperative monitoring of descending motor pathways. Transcranial electrical or magnetic MEP have been using clinically, but there are still some limitations of using in operating room. Furthermore, according to anesthetic regimens, MEP responses vary significantly. The authors observed the effects of the various anesthetics (thiopental, fentanyl, ketamine, nitrous oxide and isoflurane) on electocortical MEP in a patient who had been previously undertaken electrocortico-graphic grid insertion operation for seizure monitoring. Electromyographic responses were recorded from contralateral arm flexor and extensor using needle type electrode. Most anesthetics except ketamine decreased the amplitude of MEPs reversibly and there were differences in electromyographic responses according to measuring compound muscles.

Keyword

Monitoring; motor evoked potential; electrocortical stimulation; electromyographic responses; Anesthetics; volatile; isoflurane; gas; nitrous oxide; intravenous; ketamine; thiopental; fentanyl

MeSH Terms

Anesthetics*
Arm
Efferent Pathways
Electrodes
Evoked Potentials, Motor
Fentanyl
Humans
Isoflurane
Ketamine
Monitoring, Intraoperative
Muscles
Needles
Nitrous Oxide
Operating Rooms
Seizures
Thiopental
Anesthetics
Fentanyl
Isoflurane
Ketamine
Nitrous Oxide
Thiopental