What is the significance of the trigone?

The trigone (a.k.a. vesical trigone) is a smooth triangular region of the internal urinary bladder formed by the two ureteric orifices and the internal urethral orifice. The area is very sensitive to expansion and once stretched to a certain degree, the urinary bladder signals the brain of its need to empty.

What nerve innervates the bladder?

The lower urinary tract is innervated by 3 sets of peripheral nerves: pelvic parasympathetic nerves, which arise at the sacral level of the spinal cord, excite the bladder, and relax the urethra; lumbar sympathetic nerves, which inhibit the bladder body and excite the bladder base and urethra; and pudendal nerves.

What nerve controls the bladder sphincter?

The pudendal nerves, which originate at the S2-S4 sacral level of the spinal cord, and are the main somatic nerves, innervate the striated muscle of the pelvic floor and the external sphincter.

Is the trigone part of the bladder neck?

The trigone is a triangular portion of the bladder floor bordered (ventrally) by the internal urethral opening or bladder neck and (dorsolaterally) by the orifices of the right ureter and left ureter.

Is trigone a muscle?

urinary bladder structure …of the bladder neck, or trigone, is demarcated by the two ureteric orifices and the internal opening of the urethra. Muscle fibres loop around the urethral opening to form the internal sphincter, which is under involuntary control.

What is the function of bladder?

Bladder. This triangle-shaped, hollow organ is located in the lower abdomen. It is held in place by ligaments that are attached to other organs and the pelvic bones. The bladder’s walls relax and expand to store urine, and contract and flatten to empty urine through the urethra.

Can a pinched nerve affect your bladder?

Severely pinched nerves in certain parts of the spine can even cause loss of bowel and bladder control.

Can neurogenic bladder be temporary?

No, neurogenic bladder is not a condition that can be cured.

What does trigone of bladder mean?

The trigone is the neck of the bladder. It’s a triangular piece of tissue located in the lower part of your bladder. It’s near the opening of your urethra, the duct that carries urine from your bladder outside of your body. When this area becomes inflamed, it’s known as trigonitis.

What organ lies behind the bladder?

Posteriorly, the anterior wall of the vagina sits behind the bladder in females. In males, the rectum is located posterior to the bladder. Inferiorly, the muscles of the pelvic diaphragm support the bladder.

Which condition occurs when urine is produced but Cannot be removed from the bladder?

What is urinary retention? Urinary retention is a condition in which you are unable to empty all the urine from your bladder. Urinary retention is not a disease, but a condition that may be related to other health problems, such as prostate problems in men or a cystocele in women.

How is a trigonal block in cystoscopy performed?

Trigonal block is performed by injecting 0.25% bupivacaine with 1.0% Xylocaine into the anterior vagina under the trigone. This was done under cystoscopic guidance to visualize elevation of the trigone from the injection. Patients were identified using the CPT code 52260 for cystoscopy with hydrodistention.

Are there nerves in the bladder that control micturition?

Somatic – pudendal nerve (S2-4). It innervates the external urethral sphincter, providing voluntary control over micturition. In addition to the efferent nerves supplying the bladder, there are sensory (afferent) nerves that report to the brain.

How does the sympathetic nervous system communicate with the bladder?

The sympathetic nervous system communicates with the bladder via the hypogastric nerve (T12 – L2). It causes relaxation of the detrusor muscle. These functions promote urine retention. The parasympathetic nervous system communicates with the bladder via the pelvic nerve (S2-S4).

How does the bladder assist in the expulsion of urine?

Assists in the expulsion of urine – the musculature of the bladder contracts during micturition, with concomitant relaxation of the sphincters. In this article, we shall look at the anatomy of the bladder – its shape, vasculature and neurological control. Fig 1 – Overview of the urinary tract.