Anal contraction | definition of Anal contraction by Medical dictionary
anal wink (redirected from Anal contraction)
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
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
Perianal sensations were intact but voluntary anal contraction
Before the intervention, no one could do anal contraction
, an ability recovered by 5 afterward.
Neural control of rhythmic anal contraction
in the crayfish.