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The female or male external sphincter muscle of urethra (sphincter urethrae): located in the deep perineal pouch, at the bladder's distal inferior end in females, and inferior to the prostate (at the level of the membranous urethra) in males. It is a secondary sphincter to control the flow of urine through the urethra.
The muscle helps maintain continence of urine along with the internal urethral sphincter which is under control of the autonomic nervous system.The external sphincter muscle prevents urine leakage as the muscle is tonically contracted via somatic fibers that originate in Onuf's nucleus and pass through sacral spinal nerves S2-S4 then the pudendal nerve to synapse on the muscle.
The bladder also contains β 3 adrenergic receptors, and pharmacological agonists of this receptor are used to treat overactive bladder. The mucosa of the urinary bladder may herniate through the detrusor muscle. [6] This is most often an acquired condition due to high pressure in the urinary bladder, damage, or existing connective tissue ...
Male and female urinary bladders in lateral cross-section. In humans, the bladder is a hollow muscular organ situated at the base of the pelvis. In gross anatomy, the bladder can be divided into a broad fundus (base), a body, an apex, and a neck. [5]
Female pelvic muscles Male pelvic muscles. The pelvic floor or pelvic diaphragm is an anatomical location in the human body, [1] which has an important role in urinary and anal continence, sexual function and support of the pelvic organs. [2] The pelvic floor includes muscles, both skeletal and smooth, ligaments and fascia.
Reproducing this type of muscle action can strengthen the Kegel muscles. The action of slowing or stopping the flow of urine may be used as a test of the correct pelvic-floor exercise technique. [11] [12] The components of levator ani (the pelvic diaphragm), namely pubococcygeus, puborectalis and iliococcygeus, contract and relax as one muscle ...
The key is squeezing your pubococcygeal muscle (it should feel like stopping a pee midstream) right at the brink of climax, until you learn to separate the feeling of orgasm from the experience of ...
The middle fibers are inserted into the side of the rectum, blending with the fibers of the sphincter muscles; lastly in the male, the anterior fibers descend upon the side of the prostate to unite beneath it with the muscle of the opposite side, joining with the fibers of the external anal sphincter and transverse perineal muscles, at the ...