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QuestionAnatomy and Physiology

Describe the location of each of the following muscles. 1. Masseter 2. Sternocleidomastoid 3. Sternohyoid 4. Orbicularis oris 5. Zygomaticus minor 6. Platysma 7. Risorius 8. Temporoparietalis 9. Superior constrictor 10. Digastric
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Step 1

The masseter muscle is located in the lower part of the face, near the angle of the jaw. It is a square-shaped muscle that covers the lower half of the ramus (the vertical part) of the mandible (lower jawbone) and the adjacent part of the zygomatic arch (cheekbone).

Step 2

The sternocleidomastoid muscle is a large, strap-like muscle that runs diagonally from the sternum (breastbone) and clavicle (collarbone) to the mastoid process (bony prominence behind the ear). It is located on either side of the neck.

Final Answer

The digastric muscle is a muscle located in the neck, just in front of the sternocleidomastoid muscle. It has two bellies (an anterior and a posterior belly) that are connected by a narrow tendon. The anterior belly runs from the mandible (lower jawbone) to the hyoid bone, while the posterior belly runs from the mastoid process (bony prominence behind the ear) to the hyoid bone. The digastric muscle helps to open the mouth and elevate the hyoid bone during swallowing.

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