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- W2010053820 abstract "Transcranial magnetic motor evoked potentials (tcMMEP) were used to assess the functional integrity of the descending motor pathways. The tcMMEP, recorded bilaterally from anterior tibialis muscles, were evoked by an electric current induced in the motor cortex by a high-intensity transient magnetic field applied to the scalp surface. Potentials were recorded from ten of 12 volunteer subjects and preoperatively in 11 of 11 scoliotic patients. Group mean latency in the volunteers (32.0 ± 2.1 msec) did not differ from that of the scoliotics (28.6 ± 5.0 msec), but values in the latter group were more variable. During nitrous oxide-narcotic anesthesia, tcMMEP with reproducible latencies were obtained in 9 of 11 (82%) cases. A small, but statistically significant, increase in latency occurred during anesthesia. Compared with preoperative values (523 ± 490 µV), individual tcMMEP amplitudes were significantly decreased intraoperatively (163 ± 153 µV). Although the absolute amplitudes varied widely, the minimum recorded value was over 20 µV. Thus, intraoperative tcMMEP waveforms were readily discriminable from background electrical noise. These results demonstrate the technical feasibility of intraoperative tcMMEP monitoring. Combined somatosensory evoked potential and tcMMEP monitoring may provide a more complete picture of spinal cord function, intraoperatively." @default.
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- W2010053820 date "1989-07-01" @default.
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- W2010053820 title "Transcranial Magnetic Motor Evoked Potentials (tcMMEP) for Functional Monitoring of Motor Pathways during Scoliosis Surgery" @default.
- W2010053820 doi "https://doi.org/10.1097/00007632-198907000-00006" @default.
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