ABSTRACT
I. INTRODUCTION Electrophysiological tests have been widely used in clinical neurophysiology for over half a century. They were first applied in the lower genitourinary tract, to study sacral reflexes (1-4). The genitourinary tract has double innervation: somatic and autonomic nerves are distributed to specific areas of the urinary and genital organs. Whereas the investigation of sensory and motor somatic nerves is easy and reproducible (5,6), the testing of autonomic nerves is rather difficult. Investigating sensory-autonomic pathways from the urinary tract is feasible, but rather invasive (6-9), whereas testing motor-autonomic pathways controlling the corpora cavernosa of the penis and the detrusor muscle remains experimental (10-13).
