Detrusor
Detrusor
Detrusor (pronounced: deh-TROO-sor) is a layer of the urinary bladder wall made of smooth muscle fibers arranged in a longitudinal and circular manner. The detrusor muscle is responsible for bladder contractions that expel urine.
Etymology
The term "detrusor" is derived from the Latin word "detrudere," which means "to thrust out." This is a fitting name as the detrusor muscle's primary function is to expel urine from the bladder.
Function
The detrusor muscle contracts during the process of urination, reducing the volume of the bladder and pushing out urine. It relaxes to allow the bladder to fill with urine.
Related Terms
- Bladder: The organ that collects urine excreted by the kidneys before disposal by urination.
- Urine: A liquid by-product of metabolism in humans and in many other animals.
- Urethra: The duct by which urine is conveyed out of the body from the bladder.
- Kidneys: A pair of organs in the abdominal cavity of mammals, birds, and reptiles, excreting urine.
- Urinary system: The organs of the body that produce, store, and discharge urine.
Disorders
Disorders of the detrusor muscle can lead to urinary incontinence and other urinary tract problems. These include:
- Detrusor overactivity: This is a condition where the detrusor muscle contracts too often or without warning, leading to urinary urgency and, often, incontinence.
- Detrusor underactivity: This is a condition where the detrusor muscle does not contract sufficiently to empty the bladder, leading to urinary retention.
External links
- Medical encyclopedia article on Detrusor
- Wikipedia's article - Detrusor
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