Somatosensory evoked potentials primarily assess which pathway?

Somatosensory evoked potentials primarily assess which pathway?

• A. Sensory pathways
• B. Motor pathways
• C. Corticospinal tract
• D. Cerebellar pathways

Answer: (A)

Somatosensory evoked potentials measure the afferent sensory pathway from the stimulated peripheral nerve through the spinal cord and brainstem up to the primary somatosensory cortex. By delivering a peripheral nerve stimulus (like the median nerve) and recording the resulting brain responses, they assess conduction along the dorsal column–medial lemniscus pathway and related sensory conduits. This makes SSEPs a tool for checking sensory pathway integrity during anesthesia or surgery. In contrast, motor pathways are evaluated with motor evoked potentials, and cerebellar pathways are not the primary focus of SSEPs.

Somatosensory evoked potentials measure the afferent sensory pathway from the stimulated peripheral nerve through the spinal cord and brainstem up to the primary somatosensory cortex. By delivering a peripheral nerve stimulus (like the median nerve) and recording the resulting brain responses, they assess conduction along the dorsal column–medial lemniscus pathway and related sensory conduits. This makes SSEPs a tool for checking sensory pathway integrity during anesthesia or surgery. In contrast, motor pathways are evaluated with motor evoked potentials, and cerebellar pathways are not the primary focus of SSEPs.