anal wink


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A visible puckering at the margin of the external anal sphincter, evoked by stroking the perianal skin with a pin; absence of an anal wink reflex suggests a defect in either sensory or motor nerves or in the central pathways that mediate this reflex

anal wink

Contraction of the anal sphincter in response to pinprick stimulus of the perineum. This reflex is evidence of normal motor function at S4–S5. It is also known as the anal or anocutaneous reflex.
References in periodicals archive ?
Anorectal examination should look for a bilateral anal wink (absence suggests nerve damage).
The presence of an anal wink and bulbocavemosus reflex suggests an intact S2 through S4 reflex arc.
The physical exam should include mental and functional status, a genital and rectal exam, and a neurologic exam of sacral root integrity (such as anal wink or bulbocavernosus reflex).
Look for signs of a possible neuromuscular disorder, such as an absent anal wink or a dimple covered by a tuft of hair.