Comparison of Visual Evoked Potential Monitoring During Spine Surgeries under Total Intravenous Anesthesia versus Balanced General Anesthesia

Visual Evoked Potential (VEP) is the illustration of electrical activity recorded from sensors placed on the subject's scalp overlying the visual cortex in response to visual stimuli. Changes in this electroencephalographic signal are characterized by a waveform, where changes in latency, amplitude, and morphology could be associated with specific pathologies (Holy et al., 2009; Ota et al., 2010; Andersson et al., 2012; Chung et al., 2012; Kamio et al., 2014; Luo et al., 2015). There exists a variety of stimuli that can be used in awake subjects, the most common being checkboard pattern-reversal VEP (Andersson et al., 2012).

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