Anatomy lab: Muscles of the neck and tongue

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Genioglossus

Origin: mandible. Insertion: tongue, hyoid. Action: retracts and protrudes tongue.

Mandible

What is the origin of the genioglossus?

Tongue, hyoid

What is the insertion of the genioglossus

Retracts and protrudes tongue

What is the action of the genioglossus?

Genioglossus

Picture 8

Sternocleidomastoid

Origin: sternum, clavicle. Insertion: Mastoid process of temporal bone. Action: Unilateral: turns head to opposite side. Bilateral: flexes neck

Sternum, clavicle

What is the origin of the sternocleidomastoid?

Mastoid process of temporal bone

What is the insertion of the sternocleidomastoid?

Unilateral: turns head to opposite side. Bilateral: flexes neck

What is the action of the sternocleidomastoid?

Sternocleidomastoid

Picture 2, just under the pterygoid

Sternohyoid

Origin: sternum. Insertion: hyoid. Action: Depresses larynx and hyoid during speaking and swallowing

Sternum

What is the origin of the sternohyoid

Hyoid

What is the insertion of the Sternohyoid?

Depresses larynx and hyoid

What is the action of the sternohyoid?

Sternohyoid

Picture 9, number 5

Sternothyroid

Origin: sternum. Insertion: thyroid cartilage. Action: Depresses larynx and hyoid during speaking and swallowing

sternum

What is the origin on the sternothyroid?

thyroid cartilage

What is the insertion of the sternothyroid?

Depresses larynx and hyoid

What is the action of the sternothyroid?

Sternothyroid

Picture 10, bottom right line (not little baby line)

Mylohyoid

Origin: mandible. Insertion: hyoid. Action: Elevates hyoid, depresses mandible

Mandible

What is the origin of the mylohyoid?

Hyoid

What is the insertion of the mylohyoid?

Elevates hyoid, depresses mandible

What is the action of the mylohyoid?

mylohyoid

Picture 10, 3rd line from the top left

Geniohyoid

Origin: mandible. Insertion: hyoid. Action: elevates and protrude hyoid (widens pharynx during swallowing)

Mandible

What is the origin of the geniohyoid?

Hyoid

What is the insertion of the geniohyoid?

Elevates and protrudes hyoid

What is the action of the geniohyoid?

Geniohyoid

Picture 11 and picture 12

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