Detrusor

Detrusor is a layer of the urinary bladder wall made of smooth muscle fibers arranged in spiral, longitudinal, and circular bundles. This muscle is responsible for bladder contractions that expel urine.

Anatomy

The Detrusor muscle is located in the wall of the bladder. It is a layer of smooth muscle fibers, which are arranged in spiral, longitudinal, and circular bundles. The detrusor muscle remains relaxed to allow the bladder to store urine, and contracts during urination to release it.

Function

The primary function of the detrusor muscle is to store and expel urine from the body. It does this by relaxing to allow the bladder to fill with urine, then contracting to force the urine out through the urethra.

Disorders

There are several disorders that can affect the detrusor muscle. These include:

• Detrusor overactivity: This is a condition where the detrusor muscle contracts too often or at inappropriate times, leading to symptoms such as frequent urination, urgency, and incontinence.
• Detrusor underactivity: This is a condition where the detrusor muscle does not contract strongly enough or often enough to completely empty the bladder.
• Detrusor sphincter dyssynergia: This is a condition where the detrusor muscle and the urinary sphincter do not work together properly, leading to difficulty urinating and urinary retention.

Treatment

Treatment for detrusor muscle disorders depends on the specific disorder and its severity. Treatment options may include medications, bladder training, pelvic floor exercises, electrical stimulation, or surgery.

See also

• Urinary bladder
• Urethra
• Urinary incontinence
• Urinary retention

References

Detrusor Resources
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