Rectus abdominis muscle
Rectus abdominis muscle
The Rectus abdominis muscle (pronounced: REK-tus ab-DOM-uh-niss), often referred to as the "abs," is a long muscle that extends along the front of the abdomen. This muscle is key in both regular and strenuous physical activities, including coughing, sneezing, and heavy lifting.
Etymology
The term "rectus abdominis" comes from the Latin words "rectus," meaning "straight," and "abdominis," meaning "of the abdomen." This name is derived from the muscle's long, straight appearance.
Anatomy
The rectus abdominis is one of the major muscles in the abdominal region. It originates at the pubic bone and extends up to the cartilages of the fifth, sixth, and seventh ribs. This muscle is enclosed in a sheath formed by the aponeurosis of the other abdominal muscles, creating a distinctive "six-pack" appearance in well-trained individuals.
Function
The primary function of the rectus abdominis is to move parts of the body toward the chest—a movement known as flexion. This muscle also assists in the breathing process by compressing the internal organs of the abdomen. Additionally, the rectus abdominis helps maintain posture and balance.
Related Terms
See Also
External links
- Medical encyclopedia article on Rectus abdominis muscle
- Wikipedia's article - Rectus abdominis muscle
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