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Internal anal sphincter image

Please click on the image s to view larger version. Feel free to browse our website for more information on this particular topic. Best viewed on x px resolution in any modern browser. Pictures of anal sphincter, external 54 Pictures of anal sphincter, external 77 Pictures of anal sphincter, external Pictures of anal sphincter, external Pictures of anal sphincter, external Pictures of anal sphincter, external This article is about Pictures Of Anal Sphincter, External.
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External anal sphincter Pictures

Internal anal sphincter image
Internal anal sphincter image
Internal anal sphincter image
Internal anal sphincter image
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External anal sphincter - Wikipedia

An anal sphincter is a group of muscles at the end of the rectum that surrounds the anus and controls the release of stool, thereby maintaining continence. There are two sphincter muscles: one is internal and one is external. The external muscle helps maintain continence and keep stool in the rectum. If there is a loss of muscle control in the sphincter, incontinence may occur.
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External anal sphincter

Endoanal ultrasound is now regarded as the gold standard for evaluating anal sphincter pathology in the investigation of anal incontinence. The advent of three-dimensional ultrasound has further improved our understanding of the two-dimensional technique. Endoanal ultrasound requires specialised equipment and its relative invasiveness has prompted clinicians to explore alternative imaging techniques.
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The internal anal sphincter , IAS , or sphincter ani internus is a ring of smooth muscle that surrounds about 2. Its action is entirely involuntary , and it is in a state of continuous maximal contraction. It helps the Sphincter ani externus to occlude the anal aperture and aids in the expulsion of the feces. Sympathetic fibers from the superior rectal and hypogastric plexuses stimulate and maintain internal anal sphincter contraction. Its contraction is inhibited by parasympathetic fiber stimulation.
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