Localization of Sensory motor Cortex

Question 1

SSEP

Answer 1

somatosensory evoked potentials. Can be used intraoperatively to assess somatosensory pathway function

Question 2

What is the recommended analysis time and number of repetitions for central sulcus mapping using SSEPs?

Answer 2

analysis time of 50ms and25-50 repetitions or enough to see a clear phase reversal over the pre-and postcentral gyri

Question 3

For central sulcus mapping using SSEPs, what is the recommended stimulation site and duration for median nerve SSEP?

Answer 3

median nerve at the wrist, contralateral to the exposed cortex. Monophasic rectangular pulses of 100-300uSand 30-40mA intensity