Somatosensory Evoked Potentials (SSEPs) questions with correct answers

Evoked Potentials - Answer The electrical response of the nervous system to external stimulation 2 Types of EPs - Answer 1. Sensory: Stimulus is delivered peripherally (ear, leg, arm, etc.), and the resulting response is recorded centrally (the cortex) 2. Motor: stimulus is delivered centrally (cortex, spinal cord) and the resulting response is recorded peripherally (at a peripheral nerve or muscle) Depending on the stim modality, sensory EPs are divided into - Answer -Somatosensory (SSEPs) -Auditory (ABRs) -Visual (VEPs) Motor EPs can be divided into neurogenic and myogenic, depending on whether the response is recorded at a nerve or at a muscle. SSEPs uses - Answer 1. Monitor perfusion of the cortex or spinal cord (during a CEA or aneurysm clipping) -If the aneurysm was in the ACA: lower extremity SSEPs are primary focus -If aneurysm was in the MCA: upper extremity SSEPs are primary focus 2. Monitor structural and functional integrity of the spinal cord during orthopedic or neurological surgery (scoliosis or a spinal tumor)