title: Voluntary relaxation of the external anal sphincter.
abstract: In this study five volunteers with special training in anal sphincter exercise (Scandinavian Yoga School) managed voluntarily to reduce anal pressure. The mean reduction of anal pressure was 20 mm Hg. In one of the subjects, this was shown by manometry during low spinal anesthesia and electromyography to be caused by relaxation of the external anal sphincter.
authors.affiliation: Department of Surgery, Danderyd Hospital, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Brodén
authors.forename: A
authors.initials: A
authors.lastname: Dolk
authors.forename: C
authors.initials: C
authors.lastname: Frostell
authors.forename: B
authors.initials: B
authors.lastname: Nilsson
authors.forename: B
authors.initials: B
authors.lastname: Holmström
mesh_terms: D001003:Anal Canal / Q000502:physiology*; D004576:Electromyography; D006801:Humans; D008365:Manometry; D009119:Muscle Contraction; D009126:Muscle Relaxation; D012016:Reference Values; D015013:Yoga