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Anal wink

Synonym: anal reflex, perineal reflex, anocutaneous reflex

German: Analreflex

Definition

The anal wink (anal reflex) is a polysynaptic reflex that is elicited by stroking the skin of the anus or the perineum, causing contraction of the musculus sphincter externus. It is a key reflex that indicates function of the spinal cord segments S3-S5.

Specialties: Anatomy

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