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Body Atlas, Muscle Reference

Muscles

Complete muscle reference, origins, insertions, nerve supply, actions, clinical notes, and common injuries.

34 muscles

34 muscles in Abdomen Clear ×

Muscle Puborectalis Detail musculus puborectalis detail Abdomen Puborectalis forms a U-shaped sling around the anorectal junction, creating the anorectal angle (normally 90 degrees)… Muscle Pyloric Sphincter musculus sphincter pylori Abdomen The pyloric sphincter is a tonically contracted ring of thickened circular smooth muscle at the gastroduodenal… Muscle Pyramidalis musculus pyramidalis Abdomen The pyramidalis is a small triangular muscle in the lower anterior abdominal wall, lying in front… Muscle Pyramidalis Detail musculus pyramidalis detail Abdomen The pyramidalis is a small triangular muscle absent in 20% of individuals, lying in front of… Muscle Rectus Abdominis musculus rectus abdominis Abdomen The rectus abdominis is the paired, vertically oriented muscle running from the pubis to the lower… Muscle Rectus Abdominis Detail musculus rectus abdominis detail Abdomen The rectus abdominis is enclosed in the rectus sheath. Its segmental blood supply from the inferior… Muscle Sphincter of Oddi musculus sphincter ampullae hepatopancreaticae (Oddi) Abdomen The sphincter of Oddi is a complex smooth muscle valve at the ampulla of Vater regulating… Muscle Superficial Transverse Perineal Muscle (Perineal Body) musculus transversus perinei superficialis Abdomen The superficial transverse perineal muscle is a thin, variable muscle in the superficial perineal pouch, running… Muscle Transversus Abdominis musculus transversus abdominis Abdomen The transversus abdominis is the deepest abdominal muscle with horizontal fibres wrapping around the trunk like… Muscle Transversus Abdominis Detail musculus transversus abdominis detail Abdomen The deepest flat abdominal muscle with transverse fibres. It is the primary spinal stabiliser, contracting prior…