Sep 29, 2023 · When a person is first born, their defecation reflex is involuntary. As they age and undergo toilet training, they learn to control the urge to poop. The defecation reflex begins in the …

When undigested material reaches the distal colon and rectum it triggers a coordinated series of events known collectively as the defecation reflex. As the rectum fills, its walls stretch and activate …

Defecation reflex: The conscious and parasympathetic pathways of the defecation reflex. If this urge is not acted upon, the material in the rectum is often returned to the colon by reverse peristalsis where …

Nov 14, 2025 · The anal sphincter reflex is a process that occurs when stool moving through the digestive tract triggers the internal anal sphincter to relax, which in turn makes the external anal …

Aug 12, 2023 · Explore the physiology of defecation, including gastrointestinal motility, rectal filling and sensation, the defecation reflex, and factors affecting bowel movements. Understand the importance …

Jan 8, 2018 · When the intestines trigger the defecation reflex, you may feel pressure in your rectum or even discomfort. The defecation reflex can increase pressure in the rectum by 20 to 25 centimeters...

The defecation reflex is a complex, coordinated process involving intrinsic and extrinsic neural pathways, along with voluntary control, to eliminate fecal material from the large intestine.

Defecation is a reflex provoked through a sacral arc by distention of the rectum. In infancy, the evacuation of the rectum occurs reflexly. The development of the control over defecation reflex is …

When the intestines trigger the defecation reflex, you may feel pressure in your rectum or even discomfort. The defecation reflex can increase pressure in the rectum by 20 to 25 centimeters...

The process begins with mass movement from the colon to the rectum, initiating the defecation reflex, which involves rectal contraction and internal and external anal sphincter relaxation. Defecation is …