Pyramidal muscle
Pyramidal muscle , m. Pyramidalis, steam, has the shape of a triangle, its dimensions vary. It starts from the pubic bone, anterior to the place of attachment of the rectus abdominis muscle; Its bundles, converging, rise to the top and end at different levels of the lower sections of the white line.
Both muscles, straight and pyramidal, are enclosed in the vagina of the rectus abdominis muscle, vagina m. Recti abdominis, which is formed by aponeuroses of the abdominal muscles.
Function: are part of the abdominal press, tilt the body anteriorly; The pyramidal muscles, in addition, stretch the white line of the abdomen.
Innervation: nn. Intercostales (Thv-ThxII), n. Hypogastricus (ThXII, LI).
Blood supply: straight abdominal muscle - aa. Intercostalis, epigastricae superior et inferior; The pyramidal muscle is aa. Cgemasterica, epigastrica inferior.
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