Preferred Label : internal urethral sphincter;
Uberon definition : A urethral sphincter muscle which constricts the internal urethral orifice. It is
the junction of the urethra with the urinary bladder. The muscle is made of smooth
muscle, so therefore it is under involuntary control. It is kept tonically contracted
by the sympathetic nervous system and during micturition, is relaxed via the parasympathetic
nervous system. This is the primary muscle for preventing the release of urine[WP].;
Uberon synonym : internal urethral sphincter muscle; internal sphincter muscle of urethra; supracollicular sphincter; preprostatic sphincter; internal sphincter of urethra;
Origin ID : 0004918;
Automatic exact mappings (from CISMeF team)
- Uberon cross reference
A urethral sphincter muscle which constricts the internal urethral orifice. It is
the junction of the urethra with the urinary bladder. The muscle is made of smooth
muscle, so therefore it is under involuntary control. It is kept tonically contracted
by the sympathetic nervous system and during micturition, is relaxed via the parasympathetic
nervous system. This is the primary muscle for preventing the release of urine[WP].
