正常排尿：协调膀胱收缩和尿道括约肌松弛

中枢神经系统抑制排尿直到在时机合适时协同并促进下尿路开始和完成排尿。交感神经系统促进平滑肌括约肌的收缩。副交感神经系统通过胆碱能纤维收缩膀胱逼尿肌。躯体神经系统通过来自阴部神经的胆碱能纤维收缩横纹肌括约肌。(Adapted from DuBeau CE, Resnick NM with the Massachusetts Department of Health EDUCATE project collaborators: Urinary Incontinence in the Older Adult: An Annotated Speaker/Teacher Kit, 1993; used with permission of the authors.)