impaired smooth muscle contractility impaired contractility of urinary bladder detrusor smooth muscle MP:0000741 MPheno.ontology impaired contractility of detrusor muscle impaired contractility of detrusor urinae muscle impaired contractility of musculus detrusor inability or reduced ability of the detrusor smooth muscle of the urinary bladder to shorten or to develop increased tension voluntarily or involuntarily; stretching of the smooth muscle fibers by accumulation of urine in the bladder leads to nervous signaling giving the urge to urinate; contraction of the detrusor muscle leads to urination, via emptying of the urine contained in the bladder through the urethra and urine excretion abnormal urinary bladder physiology