This is just here as a test because I lose it

Term information

has exact synonym

sphincter colli



structure notes

The m. sphincter in the head region can be divided into 2 layers: M. sphincter colli profundus and superficialis; in studied placentals, the deepest layer has circular fibers, while the superficial layer has oblique and longitudinal fibers. In non-mammalian vertebrates (if differentiated) and in monotremes both the superficialis and the profundus layers are circular ('sphincter') muscles (Shumacher, 1956; Saban, 1971).