What are micturition contractions?
The micturition reflex involves a coordinated and sustained contraction of the detrusor muscle (the detrusor reflex) along with simultaneous relaxation of the urethra. 20. Moreover, depending on the size of the bladder, the micturition reflex may also result in urine storage.
What are bladder contractions controlled by?
The detrusor smooth muscle is the main muscle component of the urinary bladder wall. Its ability to contract over a large length interval and to relax determines the bladder function during filling and micturition.
What is flaccid bladder?
An atonic bladder, sometimes called a flaccid or acontractile bladder, refers to a bladder whose muscles don’t fully contract. This makes it hard to urinate. Usually, when your bladder fills with urine and stretches out, it sends two signals to your spinal cord: a sensory signal that gives you the urge to urinate.
What is bladder detrusor muscle?
The wall of the bladder is comprised of smooth muscle fibers oriented in multiple different directions. These smooth muscle fibers are collectively known as the detrusor muscle. This interwoven orientation provides the bladder with the ability to stretch in response to the presence of urine.
What is the difference between urination and micturition?
Micturition, also known as urination, is the ejection of urine from the urinary bladder through the urethra to the outside of the body. In healthy humans the process of urination is under voluntary control.
Can bladder contractions cause urination?
A spasm itself is the sudden, involuntary squeezing of a muscle. A bladder spasm, or “detrusor contraction,” occurs when the bladder muscle squeezes suddenly without warning, causing an urgent need to release urine. The spasm can force urine from the bladder, causing leakage.
How do you stop bladder spasms?
Exercise. Pelvic floor exercises, such as Kegels, are often helpful in treating bladder spasms caused by stress and urge incontinence. To do a Kegel, squeeze your pelvic floor muscles as if you’re trying to stop the flow of urine from your body.
What medication is used for bladder spasms?
Medicines to relax the bladder. The most commonly prescribed drugs to relax the bladder and prevent spasms are called anticholinergics. They include tolterodine tartrate (Detrol LA), oxybutynin chloride (Ditropan), darifenacin (Enablex), oxybutynin (Oxytrol), trospium chloride (Sanctura XR), and solifenacin (Vesicare).
What is bladder dystonia?
Neurogenic bladder is bladder dysfunction (flaccid or spastic) caused by neurologic damage. Symptoms can include overflow incontinence, frequency, urgency, urge incontinence, and retention. Risk of serious complications (eg, recurrent infection, vesicoureteral reflux, autonomic dysreflexia) is high.
What is an Areflexic bladder?
When the bladder is not able to empty by a reflex, it is called an “areflexic Bladder.” Areflexic Bladder: Process of Urination. The bladder fills with urine and stretches. The stretching bladder pushes out onto nearby nerves. The nerves send signals to the spinal cord but they are not able to reach the cord.
What is detrusor failure?
Detrusor underactivity, or underactive bladder (UAB), is defined as a contraction of reduced strength and/or duration resulting in prolonged bladder emptying and/or a failure to achieve complete bladder emptying within a normal time span.
What relaxes the detrusor muscle?
The detrusor muscle remains relaxed to allow the bladder to store urine, and contracts during urination to release urine….
| Detrusor muscle | |
|---|---|
| Actions | Sympathetic relaxes, to store urine Parasympathetic contracts, to urinate |
| Identifiers | |
| Latin | musculus detrusor vesicae urinariae |