正常排尿：协调膀胱收缩和尿道括约肌松弛

中枢神经系统会抑制排尿，直至合适时机，并协调、促进下尿路的传入信号，启动并完成排尿过程。交感神经系统收缩平滑肌括约肌。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.)