A 43-Year-Old Medical Student Suffers Severe Damage to the Conus

Multiple Choice

A 43-year-old medical student suffers severe damage to the conus medullaris in an accident. He initiates defecation by inserting a balloon-tipped Foley catheter into his rectum and inflating the balloon with a 50 mL syringe. Which reflex is stimulated by the balloon in this patient?

A) Duodenocolic reflex
B) Enterogastric reflex
C) Ileocecal reflex
D) Intrinsic defecation reflex
E) Spinal cord reflex