Anal wink

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(Redirected from Anal contraction)

The anal wink or anocutaneous reflex is the reflexive contraction of the external anal sphincter upon stroking of the skin around the anus.

The absence of this reflex indicates that there is an interruption of the reflex arc, which may be in the sensory afferent limb or the motor efferent limb. The synapse between the afferent and efferent limbs occurs in the lowest sacral segments of the spinal cord.

Child abuse controversy

Dr. Bruce Woodling developed the anal wink test which he alleged was an indisputable diagnostic indicator that a child had been sodomised. In a clinical setting, he would spread a child’s buttocks and touch the rectum with a cotton swab. If the anus "winked", Woodling testified, this was "proof of sodomy". His testimony was prominent in the McMartin preschool child abuse case — the largest and costliestTemplate:Fact court case in United States history.

It has since been established that Woodling never made any effort to validate his test, and it has been utterly discredited.

Woodling's pseudoscientific testimony contributed to Ray Buckley spending five years in remand prison. Buckley was later released without conviction.

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