What practice involves massaging the anal sphincter muscle to induce bowel movement?

Digital stimulation is a practice that involves inserting a gloved finger into the rectum and applying pressure and massage to the anal sphincter muscle. This method is used to help initiate or encourage a bowel movement, particularly in individuals who may have difficulty due to conditions such as neurogenic bowel or other mobility issues. By stimulating the nerves around the sphincter and rectal area, digital stimulation can promote contraction and relaxation, facilitating the movement of stool through the intestines.

In this context, the other practices listed are different approaches and may not specifically involve the direct stimulation of the anal sphincter muscle in the same way. Manual removal refers to the physical removal of stool that has become impacted. Enema extraction involves the use of liquid introduced into the rectum to soften stool, while suppository massage refers to inserting a suppository to aid in bowel movement, which may not involve direct stimulation of the sphincter muscle itself.