Fig. 2.

Response of bladder contractions and urethral activity to intraurethral administration of capsaicin in a control rat. Each panel shows isovolumetric bladder pressure (top), UPP (middle), and electromyography of the external urethral sphincter (EUS-EMG, bottom) recordings. A: cessation of bladder contractions and micturition-associated urethral relaxations and high-frequency oscillations (HFOs) following intraurethral administration of capsaicin (CAP). Note the appearance of urethral low-frequency oscillations (LFOs) following cessation of bladder activity. B and C compare, with different time bases, HFOs and LFOs, respectively. Numeric comparisons are found in Table 2.