Sites, Rates and Filters that Best Eliminate Background Noise and Variability during Cortical Evoked Potentials Spinal Cord Monitoring

Understanding the physiology of the posterior column and associated pathways is essential in planning for spinal cord monitoring. The physiology of these important pathways can be investigated in terms of the system’s response to simple stimuli. These stimuli can vary in several important ways including the location of the stimulation site, duration of each stimulus pulse, stimulus intensity, stimulus repetition rate, sites of the principal recording electrode and its corresponding reference electrode, and the effects of the high and low analog filters, have studied physiology of posterior column related pathways in a Systematic way (Nuwer and Dawson, 1984a, 1984b, 1984c). The details of our studies have been published previously. These studies provide basic knowledge about physiology. They also were designed so that useful, clinical information can be extracted. From this clinical information we have been able to make recommendations regarding optimizing the methodology used in clinical spinal cord monitoring with cortical somatosensory EPs.

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