Physiology of nerve and muscle Dr/ Asmaa Mohamed Sayed https://www.youtube.com/watch?v=fOqwW3qcU0c&feature=youtu.be&fbclid=IwAR2IiIexc-HYL_elE2Av_LvIuBHZ05bTPa0M6obrj-Ktb-OkXmE4s6qNdfs