Dog · Muscle · Abdomen
Rectus abdominis muscle
Musculus rectus abdominis
Flexes the trunk, raises intra-abdominal pressure and supports the abdominal floor.
- System
- Muscle
- Region
- Abdomen
- Sides
- Paired: left and right
- Named parts
- 1
Where it runs from and to
A muscle is told apart from its neighbours by what it takes hold of at each end, which is also what decides what it does when it shortens.
- Origin
- Sternum and the first costal cartilages.
- Insertion
- Pecten of the pubis, through the prepubic tendon.
- Action
- Flexes the trunk, raises intra-abdominal pressure and supports the abdominal floor.
- Nerve
- Ventral branches of the caudal thoracic and cranial lumbar nerves.
Written for Vetomica in its own words from the standard reference anatomy of the dog; the books it was checked against are listed below.
Named parts
The parts of this muscle the books name separately, and what each is called in the Nomina Anatomica Veterinaria.
- Tendinous intersectionsIntersectiones tendineae
- The transverse tendinous bands that cross the muscle along its length and divide it into blocks.Miller 2020, p. 539
What it works on
Bones it takes hold of
- Rib 1
- Costal cartilages
- Sternum
- Pubis
Muscles and ligaments it works with
- Prepubic tendon
- Linea alba
- External abdominal oblique muscle
- Obliquus internus abdominis
- Transversus abdominis
- Rectus thoracis
- Deep pectoral muscle
Terminology
- English
- Rectus abdominis muscle
- Latin (NAV)
- Musculus rectus abdominis
- Status
- A valid term in the Nomina Anatomica Veterinaria
References
Where to read this structure in full, and where the named parts above were read.
- NAV 2017Myologia
- Miller's Anatomy of the Dog, 5th ed.The Muscular System: muscles of the abdominal wall
- Dyce, Sack & WensingThe abdomen of the dog and cat
- Miller 2020 (book pass)ch. 6 The Muscular System, PDF p. 539