Modification of Electrode in Dermatosensory Evoked Potential


  • Sumai Hamad Jaafer1 , Mohammed Umara Obed2



Somatosensory, evoked potential, electrode, electrical charge.


Somatosensory evoked potential (SSEP) usually done using bipolar surface stimulator of peripheral nerve

and recorded by cortical surface or subdermal needle electrodes, in this study we modify an adhesive large

surface area, surface stimulator using the same montage and method then compare the result between them. We

took nineteen patients of median nerve SSEP, locate and identify the shape of dermatom assigned according

to text using large square adhesive surface electrode. The same as the shape of dermatom, this is the cathode

electrode, for the anode, a strip has the same length of the cathode with a width of two centimetres placed

beneath the cathode, the circular ground band between stimulated and recording electrode. The subjects

In this study prepared for routine SSEP study the result obtained of both study compared using statistical

method and we found there was a significant different between two method and the modified as higher

amplitude using lesser stimulated threshold but not significant different between latency. That’s happened

because we increased the surface area of stimulation which means more the motor nerve was stimulated.

Author Biography

  • Sumai Hamad Jaafer1 , Mohammed Umara Obed2

    1 Lecturer, Medical Laboratory techniques Department, Erbil Medical Institute, Erbil Polytechnic University, Erbil,

    Kirkuk Road, Kurdistan Region, Iraq, 2 Dr. MD.M.B.Ch, M.Sc. in Neurophysiology, Erbil Teaching Hospital, Erbil,

    Kurdistan Region, Iraq




How to Cite

Modification of Electrode in Dermatosensory Evoked Potential. (2020). Indian Journal of Forensic Medicine & Toxicology, 14(3), 2385-2390.