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 …

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 …

Nov 13, 2023 · 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 …

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 …

Aug 23, 2010 · What is a defecation reflex? Two anal sphincters and its nerve supply ensures that feces do not pass out in a continuous manner. The internal anal sphincter is composed of …

Apr 10, 2023 · As it becomes filled the rectal walls expand and stretch receptors stimulate the desire to defecate. The urge to defecate arises from contraction of rectal muscles, relaxation …

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 …

Jan 13, 2021 · These reflexes are controlled by the autonomic nervous system. The two major reflexes for defecation are the parasympathetic defecation reflex and the intrinsic myenteric …

Mar 4, 2022 · During defecation, the fecal matter is moved from the digestive tract to the rectum through a wave of muscle contraction in the walls of the colon called peristalsis. The rectum …

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.