Modification of cortical stimulation for motor evoked potentials under general anesthesia: technical description.

Abstract:

:This pilot study presents a possible modification of direct cortical electrical stimulation technique for the recording of motor evoked potentials under general anesthesia. The exposed primary motor cortex was stimulated by a short train of anodal rectangular pulses at high frequency (300-500 Hz), while the compound muscle action potentials were recorded from the forearm and hand muscles. When compared with the traditional way of eliciting movement of the extremities by applying a train of pulses at lower frequency (50-60 Hz), muscle responses were obtainable at an intensity of much lower charge. It is suggested that this stimulation achieves a repetitive activation of the corticomotoneuronal tract. Responses could be continuously recorded throughout surgery and seemed to respond to surgical manipulation affecting the motor pathways. This technique seems to be applicable for intraoperative monitoring of motor pathways but requires further optimization of stimulation and recording parameters before wider clinical applications are possible.

journal_name

Neurosurgery

journal_title

Neurosurgery

authors

Taniguchi M,Cedzich C,Schramm J

doi

10.1227/00006123-199302000-00011

subject

Has Abstract

pub_date

1993-02-01 00:00:00

pages

219-26

issue

2

eissn

0148-396X

issn

1524-4040

journal_volume

32

pub_type

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