“…Martinez-Salamanca et al showed that cavernosal smooth muscle strips derived from human penes following RP and rat penes after experimental CNI were overtly responsive to adrenergic stimulation, whereas nitrinergic relaxation was impaired compared with corporal tissue without nerve injury [5,6]. Furthermore, Hsieh et al have shown that, following injury to the cavernous nerves, regenerated sympathetic fibers seem to outweigh regenerated parasympathetic fibers [7].…”