Fig. 2From: Absent or impaired rectoanal inhibitory reflex as a diagnostic factor for high-grade (grade III–V) rectal prolapse: a retrospective studyExample of rectoanal inhibitory reflex (RAIR). a Normal RAIR. This shows anal relaxation responding to rectal balloon distension. b Absent or impaired RAIR. This shows no anal relaxation despite rectal balloon distensionBack to article page