detrusormuscle
The detrusor muscle is a thick bundle of smooth muscle fibers that forms the wall of the urinary bladder. It is responsible for bladder contraction during micturition and for maintaining bladder storage by relaxing during filling. The detrusor comprises multiple smooth muscle layers arranged in interwoven directions, allowing it to generate coordinated contractions while accommodating large volume changes.
Anatomically, the detrusor lies between the mucosa and the outer bladder layers. Its muscle fibers receive
Physiologically, during storage, sympathetic activity dominates and detrusor tone remains low, while the internal sphincter stays
Pathologies involving the detrusor include detrusor overactivity, detrusor underactivity, and detrusor hypertrophy associated with bladder outlet