Abstract: A processor, system, and method for alerting a surgeon to the potential of a peripheral sensory nerve injury is provided. The technology stimulates a peripheral nerve, such as the median nerve, proximate the wrist of a patient and registers the sensory evoked potential (SEP) using a cranium electrode. The SEP is analyzed to determine a slope of a portion of the SEP between the peak of the SEP and the trough of the SEP. The slope is compared to a baseline to determine whether the slope deviates a predetermined amount from the baseline slope, which is indicative of potential, imminent, or an actual positioning injury. When it is determined that the slope deviates a predetermined amount, an alarm is provided to the surgeon such that the surgeon can take corrective action.