5. 6. B. Matching Match each term listed on the left with its correct descriptio

Question

5. 6. B. Matching Match each term listed on the left with its correct description on the right. 1. orbicularis oculi 2. buccinator 3. stylohyoid 4. masseter 5. frontal belly ofoccipitofrontalis A. retracts scalp B. elevates upper lip C. thin muscle on sides of neck depresses jaw D. attached to styloid process and hyoid bone E. -6. platysma tenses angle of mouth 7. corrugator supercilii 8. zygomaticus major 9. occipital belly of occipitofrontalis laterally F. elevates corner of mouth G. elevates jaw H. two-bellied neck muscle I. wrinkles forehead J. tenses cheeks K. protracts scalp L. closes eye 10. levator labii superioris 11. digastric 12. risorius C. Short-Answer Questions Describe the location of each of the following muscles. 1. masseter 2. sternocleidomastoid 3. sternohyoid

Explanation / Answer

B. Matching

C. SHORT ANSWER QUESTIONS

Origin: The larger superficial layer originates on the zygomatic process of the maxilla and the lower border of the zygomatic arch. The smaller deep portion originates on the zygomatic arch.

Insertion: The superficial portion inserts on the ramus of the mandible and the deep portion inserts on the upper half of the ramus and the lateral surface of the coronoid process of the mandible

The muscle is made up of two branches: The medial or sternal branch, which is directed superiorly, laterally, and posteriorly and the lateral or clavicular branch which is directed almost vertically upward.

The right side rotates the head to the left and flexes it to the right. The left side rotates the head to the right and flexes it to the left.

Origin: Manubrium of the sternun and medial clavicle.

Insertion: Mastoid process, occipital prominence behind the ear.

Sternohyoid-  The sternohyoid muscle is a long, thin muscle located along the entire length of the front of the neck. This muscle is connected by tendons — strong, flexible tissue that usually connects muscle to bone — to the hyoid bone at its top end, and connected to the sternum at its lower end. The hyoid is a bone near the top of the throat. The sternum is the bone at the front of the rib cage.

Due to its location, the sternohyoid is useful for several functions, including depression (lowering) of the hyoid bone, head and neck movement, and speech.

The sternohyoid muscle usually lies along the left side of the trachea, or windpipe, in the throat area. The muscle goes from the sternum, or breastbone, to the edge of the thyroid cartilage. It starts in the manubrium sterni, the uppermost part of the breastbone, and inserts into the lamina, or thin layers, of thyroid cartilage, which is locatedinferior to (behind) the hyoid

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