Understanding the Detrusor Muscle and Its Role in Urinary Function

The detrusor muscle is a muscular layer in the wall of the bladder that helps to expel urine from the body. It is one of the two main muscles that make up the urinary bladder, the other being the external sphincter muscle. The detrusor muscle is responsible for contracting and relaxing to control the flow of urine.

During urination, the detrusor muscle contracts to push urine out of the bladder and into the urethra, while the external sphincter muscle relaxes to allow the urine to pass through. The detrusor muscle also helps to maintain bladder pressure and prevent urinary incontinence.

Dysfunction of the detrusor muscle can lead to various urinary disorders such as overactive bladder, underactive bladder, or urinary retention. In these cases, the detrusor muscle may contract too frequently or too strongly, leading to symptoms such as frequent urination, urgency, or inability to hold urine. Treatment for detrusor dysfunction may include medications, bladder training, or surgery, depending on the underlying cause and severity of the condition.