Knowledge of how changes in urinary bladder continence and micturition affect brain activity is important for understanding brain mechanisms. It was reported the experimental results by PET that increased brain activity related to increasing bladder volume was seen in the periaqueductal grey matter (PAG), in the midline pons, in the mid-cingulate cortex and bilaterally in the front lobe area. Increased brain activity relating to decreased urge to void was seen in a different portion of the cingulated cortex, in premotor cortex and in the hypothalamus. This study used near infrared (NIR) spectroscopy to verify brain activity associated with bladder continence and micturition. Two healthy male (right-handed) aged 30 years will be tested as compared with reported results.