Cannon-Boehm point
Red marking: Cannon-Böhm point
(1) Ascending colon (ascending colon)
(2) Transverse colon (transverse colon)
(3) Descending colon (descending colon)
(4) Sigma ( sigmoid colon )
(5) Rectum (rectum) and anus
A transition zone of the nervous control of the large intestine is referred to as the Cannon-Böhm point (English Cannon's point or Cannon's ring ) . The parasympathetic innervation area of the vagus nerve ends in the last third of the transverse colon (transverse part of the colon ) and the innervation area of the parasympathetic nerve of the sacral pelvic nerves of the lower spinal cord ( sacral or sacral cord ) begins .
However, this is not a clear boundary line, as the two areas of innervation overlap. At this point, a slight narrowing due to an increased tone of the intestinal muscles - but without the sphincter muscle - is observed, which is why the term Cannon's ring is also used in English .
The border area is named after the US physiologist Walter Bradford Cannon (1871-1945) and the Munich radiologist Gottfried Böhm (1880-1952).
literature
- Aumüller et al.: Dual series anatomy. Thieme, 2010, ISBN 978-3-13-136042-7 , pp. 789, 903.
Individual evidence
- ↑ Rolf Baur: Compact Textbook Anatomy: in 4 volumes, Volume 4 : Sensory Systems , Skin, CNS, Peripheral Line Lines , Schattauer Verlag , 2005, 713 pp. ISBN 3794520645 , p. 632.