Detrusor function

Detrusor function refers to the physiological coordination of the detrusor urinae muscle, the smooth muscle component of the urinary bladder wall responsible for storing and expelling urine (StatPearls, "Physiology, Bladder"). It is not a singular molecular target but a physiological endpoint regulated by the autonomic nervous system via several receptors, most notably the muscarinic M3 and beta-3 adrenergic receptors (NIH, "Detrusor muscle activity"). During the filling phase, the detrusor remains relaxed to accommodate volume; during micturition, parasympathetic signals trigger contraction to void the bladder (PubMed). Clinical disorders such as overactive bladder (OAB) are characterized by detrusor overactivity, which leads to symptoms of urgency and frequency (Journal of Urology). Pharmacological management involves targeting specific receptors on the detrusor myocytes—such as using muscarinic antagonists like oxybutynin to reduce contractions or beta-3 agonists like mirabegron to enhance relaxation (Mayo Clinic). Consequently, while detrusor function is a critical parameter for evaluating drug efficacy in urology, it represents a complex biological process rather than a discrete therapeutic molecule.

Other names

Bladder contractionDetrusor muscle activityMicturitionVoiding function

Modulation of detrusor activity is achieved through the antagonism of muscarinic acetylcholine receptors (primarily M3) to inhibit involuntary contractions or the agonism of beta-3 adrenergic receptors to facilitate bladder relaxation and storage capacity.