Titlebook: Intraoperative Neurophysiologic Monitoring in Neurosurgery; Johannes Schramm,Aage R. M?ller (Professor of Neur Conference proceedings 1991

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Overview: 978-3-642-75752-5978-3-642-75750-1

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Techniques and Equipment for Intraoperative Monitoringomyographic (EMG) potentials from muscles that are innervated by cranial motor nerves are described. It is shown that intraoperative recordings of evoked potentials not only are of value in helping to reduce neurological deficits as a result of surgical manipulations, but they can also be used to guide the surgeon in some types of operations.

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Technical Parameters, Artifacts, and Quality Assessment of Intraoperative Evoked Potentialsat they can identify the technical problems and minimize them. The monitoring team can assess the adequacy of their own recordings by applying some general quality-assurance standards, assessing reproducibility, and noisiness of the recordings. The overall technical goal of monitoring should be the

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New Technique for Intraoperative Localization and Monitoring of Cranial Nerves — Preliminary Studyn of the arm tip on the corresponding CT slice..We conducted an animal experiment to determine how well the Neuronavigator might predict the nerve’s location. An agar ball was placed on an isolated rat sciatic nerve, to serve as a model of an acoustic neurinoma. The nerve was electrically stimulated

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Localization of Motor Cortex with Median Nerve Somatosensory Evoked Potentialso be reliable by themselves. Somatosensory evoked potentials (SSEP) provide a means of helping the surgeon identify the primary postcentral somatosensory cortex, thereby also establishing the location of the precentral motor cortex. This technique is relatively quick and simple, and it can be used w

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Recording of Myogenic Motor Evoked Potentials (mMEP) Under General Anesthesiaients without anesthesia, but the second phase of increased excitation was missing in patients under anesthesia. In a small sub-group of patients the effects of transcranial magnetic and electrical stimulation were compared. In cases in which magnetic stimulation worked it provoked a more variable d

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Facilitation of Muscle Responses to Transcranial Magnetic Stimulation of the Motor Cortex by Trains als (CMAP) were enhanced by 300–1000%, and the amplitudes were enhanced by as much as 1500% with a TS of 50 ms prior to CortStim. With a TS of 20–30 ms, amplitudes decreased to below 100%. The differences were statistically significant by the Wilkoxon-Mann-Whitney u-test..The facilitation seen with