List and Discuss the Primary Abdominal Muscles, Explaining How They

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The Answer is The primary abdominal muscles are the rectus abdominis, the external obliques, the internal obliques, and the transverse abdominis. These muscles work together to provide stability and support for the spine and pelvis, as well as to assist in various movements of the trunk.

The rectus abdominis is the most superficial abdominal muscle and is responsible for flexing the trunk, such as during a sit-up or crunch. It also helps to stabilize the pelvis during movements.

The external obliques are located on the sides of the abdomen and are responsible for rotating and side-bending the trunk. They also assist in flexing the trunk and provide support during activities like lifting and twisting.

The internal obliques are located underneath the external obliques and work in conjunction with them to rotate and side-bend the trunk. They also help to stabilize the spine and pelvis during movements.

The transverse abdominis is the deepest abdominal muscle and acts like a corset, providing stability and support for the internal organs and spine. It also helps to compress the abdomen and assist in forced expiration.

These muscles perform motion in all three planes (sagittal, frontal, and transverse) by working together to produce various movements of the trunk. For example, during a twisting motion, the obliques work to rotate the trunk in the transverse plane, while also providing stability in the frontal and sagittal planes. During a side bend, the obliques work to bend the trunk to the side in the frontal plane, while also providing stability in the other planes. Overall, the primary abdominal muscles work synergistically to provide support and movement in all three planes of motion.

List and Discuss the Primary Abdominal Muscles, Explaining How They

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