An improved technique for the demonstration of sympathetic nerves in human cardiac muscle.
D000818:Animals; D004285:Dogs; D006329:Heart Conduction System / Q000033:anatomy & histology*; D006801:Humans; D008297:Male; D008722:Methods; D008856:Microscopy, Fluorescence; D009119:Muscle Contraction; D009132:Muscles / Q000294:innervation; D010413:Penis; D013564:Sympathetic Nervous System