Fig. 4.

A typical polygraphic recording of wakefulness, SWS, and PS before (control) and circa day 10 after a bilateral cytotoxic lesion in a rat from the LP group.Control, Erectile events during wakefulness and PS were associated with an increase in baseline erectile tissue pressure and suprasystolic CSP pressure peaks concurrent with BS muscle bursts. SWS was noted by a general absence of penile erections.Post-Lesion, Waking-state erections remained qualitatively and quantitatively intact after neurotoxic lesions, whereas PS-related erections were severely disrupted after lesion in this rat from the LP group.