anal reflex

anal reflex
anal wink reflex contraction of the anal sphincter on scratching or other irritation of the skin of the anus.

Medical dictionary. 2011.

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  • Anal wink — The anal wink, anal reflex, perineal reflex, or anocutaneous reflex is the reflexive contraction of the external anal sphincter upon stroking of the skin around the anus.A noxious or tactile stimulus will cause a wink contraction of the anal… …   Wikipedia

  • Reflex anal dilatation — refers to a clinical marker associated with anal sexual assault in childrencite journal |author=Read NW, Sun WM |title=Reflex anal dilatation: effect of parting the buttocks on anal function in normal subjects and patients with anorectal and… …   Wikipedia

  • reflex anal dilatation — noun Involuntary widening of the anus on examination • • • Main Entry: ↑reflex …   Useful english dictionary

  • Reflex — A reaction that is involuntary. The corneal reflex is the blink that occurs with irritation of the eye. The nasal reflex is a sneeze. * * * 1. An involuntary reaction in response to a stimulus applied to the periphery and transmitted to the… …   Medical dictionary

  • Anal — Anus Related meanings: *Anal bleaching, is the practice of bleaching the darker pigmentation of the skin around the anus. *Anal fissure *Anal retentive, describing a person overly uptight or distressed over ordinarily minor problems. *Anal sex,… …   Wikipedia

  • Anal sampling mechanism — The Anal sampling mechanism (also known as the anorectal sampling reflex) is a reflex which detects the contents of the rectal vault and prevents the unexpected voiding of feces. The reflex helps maintain continence.The physiologcal basis for the …   Wikipedia

  • reflex anal dilatation — noun the involuntary expansion of the anus on examination, used as an indicator of previous repeated anal penetration and for determining whether a child has been sexually abused …  

  • perianal reflex — anal r …   Medical dictionary

  • Bulbocavernosus reflex — The bulbocavernosus reflex is a polysynaptic reflex that is useful in testing for spinal shock and gaining information about the state of spinal cord injuries (SCI). The test involves monitoring anal sphincter contraction in response to squeezing …   Wikipedia

  • rectoanal inhibitory reflex — relaxation of the internal anal sphincter in response to increased pressure in the rectum; it can be tested by inflating a balloon in the lumen. It is absent in cases of congenital megacolon …   Medical dictionary

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