Anal reflex disappears

The disappearance of the anal canal reflex is a kind of shallow reflex in the human nerve reflex. The person lays flat, lifts and lowers the lower limbs, straightens it across the perineal area with a small needle, and the external anal sphincter contracts. The afferent nerve is the genital nerve, and the center is in the posterior horn cell column of the iliac pith and the anterior horn cell in the same segment. The efferent nerve is the genital nerve. The external anal sphincter receives bilateral perineal innervation. When one side of the pyramidal tract is damaged or the peripheral nerve is damaged, the anal reflex still exists. When the two side of the pyramidal tract is damaged or the cauda equina is damaged, the anal reflex disappears. Fecal incontinence in the elderly can show disappearance of anal canal reflexes.

The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.