bladder detrusor muscle

The bladder detrusor muscle is a smooth muscle layer that surrounds the bladder, playing a vital role in urination. When the bladder fills with urine, the detrusor muscle remains relaxed to allow storage. When it’s time to urinate, the muscle contracts, squeezing the bladder to push urine out through the urethra. This coordinated muscle activity is controlled by nerves and the brain, ensuring proper timing of bladder emptying. Healthy detrusor muscle function is essential for normal urination, and problems with it can lead to urinary difficulties like urgency, frequency, or incontinence.