Urination

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Related to Micturation: haematuria, micturition reflex

urination

[‚yu̇r·ə′nā·shən]
(physiology)
The discharge of urine from the bladder. Also known as micturition.

Urination

 

(also called micturition), the reflex act of excreting urine from the body.

Uropoiesis—the production of urine—is a constant process, but urination occurs only intermittently, as the urinary bladder fills. Humans urinate four to six times daily. Urine is prevented from escaping from the bladder by two ring-shaped layers of muscle fibers: an internal sphincter, which consists of smooth muscle fibers, and an external one, which consists of striated fibers. When the pressure within the bladder reaches 2–2.66 kN/m2 (kilonewtons per square meter), or 15–20 mm Hg (millimeters of mercury), stimulation of the mechanoreceptors (the nerve endings of sensory neurons) in the wall of the bladder elicits the urge to urinate. In man, this critical pressure is achieved when 300–350 ml of urine accumulate in the bladder. During urination, the external sphincter relaxes reflexively as the muscles of the bladder wall contract.

Urination is regulated by the nerve centers in the spinal cord and brain; these centers are controlled, in turn, by the cerebral cortex. The filling of the urinary bladder arouses the cerebral cortex to elicit the urge to urinate. Certain neurological diseases, as well as injuries to the muscles of the urinary bladder, impair urination.

M. IA. RATNER

What does it mean when you dream about urination?

Urination in a dream has several interpretations that range from inhibited sexual desires to the outpouring of emotional feelings that have been repressed.

Urination

(dreams)
Releasing bodily wastes in a dream suggests a need to release repressed emotions and/or anxiety. At times, urination may have sexual connotations. Many people dream about the need to urinate, which wakes them up, and then they realize that they need to use the bathroom. At times, the dream triggers the physical sensation and other times the physical sensation may become a part of the dream.
References in periodicals archive ?
The latter authors also indicated that the nonneuronal acetylcholine may play a role in the regulation of the bladder tone in the storage phase of the micturation reflex, particularly in the elderly and so, the antimuscarinic agents are effective fore the treatment of detrusor over-activity.
A newborn girl presented with a 2-cm cystic genital mass increasing in size during micturation (Fig.
In the initial hospital management she was started on diuretics with daily weight monitoring and as the ultrasound showed hydroureters, a micturation cysto urethro graphy (MCUG) was planned to look for vesico-ureteric reflux (VUR) and it showed grade 4 VUR.
Case 2: A 24 years old married for six months presented in emergency with history of four months gestational amenorrhea, syncopel attack, sever lower abdominal pain, nausea and difficulty in micturation for 2 days followed by mild p/v bleeding 1 month ago.
It should be noted hat this procedure is less complex than a phalloplasty, has fewer complications, and has the benefit of providing greater erogenous sensation, but is not often large enough to use in sexual penetration and may or may not allow for micturation while standing.
Child had a good appetite and unaltered bowel and bladder habits, no h/o vomiting, fever, burning micturation.
A prenatal diagnosis of urethral duplication is possible by evaluating foetal micturation with Doppler ultrasonography.
He said he had micturation feeling and after micturation he felt relieved.
Male patients presenting with the history of lower urinary tract symptoms s uch as frequency of micturation, nocturia, hesitancy, urgency, dribbling and or, retention were evaluated in surgical out-patient department for prostatic enlargement.
0 Table 2: Distribution of patients according to presenting symptoms (n=52) Symptoms Number of Patients Percentage (%) Fever 39 75 Burning/Crying during micturation 15 28.
Most patients presented with complaint of poor urinary stream, dribbling of urine and crying during micturation.
Initial experiences with neuromodulation as treatment for incontinence and micturation disorders in The Netherlands.