Mr. Sunil Mehta -DNEP(INK) Neuroelectrophysiologist. Neotia Getwel Healthcare Centre SOMATOSENSORY EVOKED POTENTIAL: v Somato- Body v Sensory- sensation v Evoked - Image v Potential- Reading Ø Short latency somatosensory evoked potential are the electrical potential generated mainly by the large diameter peripheral and central sensory pathways in response to sensory stimulus. large diameter peripheral - Large fiber nerve cells have diameters more then about 5 MICROMETERS, AND SMALL FIBER ARE THINNER. THE LARGE FIBER ARE BIGGER BECAUSE THE AXON ARE SHEATHED IN FATTY WRAPPINGS CALLED "MYELIN" THIS HELPS THEM TO SEND SIGNALS FASTER THAN SMALL- FIBERS. SSEP PATHWAYS:- ◦ Dorsal root ganglia - Gracile and cuneate nuclei in the lower medulla - fasciculi gracilis and cuneatus in the spinal cord - pons - medial lemnis
NEUROELECTROPHYSIOLOGY