rectus abdominis covers the anterior abdominal wall. Its superior attachment inc

Question

rectus abdominis covers the anterior abdominal wall. Its superior attachment includes the xiphoid process and costal cartilages of ribs 5 through ts inferior attachment includes the pubic symphysis and pubic crest. The muscle depresses the ribs and flexes the vertebral column. Which attachment superior or inferior) is the origin, and which is the insertion? Explain. Costal cartlilage Xyphoid process Rectus abdominis Pubic Asymphysis 2. When the hyoi d bone is elevated, the suprahyoid muscles are the agonists. What muscles act as antagonists? Explain. 3. The splenius capitis is a deep muscle on the posterior surface of the neck. It is attached to the occipital bone and to spinous processes of cervical and thoracic vertebrae. One of its functions is to extend the head. Use this information to complete the following table. -Occipital Origin of splenius capitis bone Splenius capitis Insertion of splenius capitis Structure acting as a lever Structure acting as the fulcrum

Explanation / Answer

Origin: pubic symphysis and pubic crest

Insertion: xiphoid process and costal cartilages of ribs.

This muscle extends from pubic tubercle, pubic symphysis, and pubic cerst to the xiphoid process and costal cartilages of ribs 5 to 7.

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