Infrahyoid Muscles

Question 1

Origin: posterior surface of both the manubrium and the medial clavicle
Insertion: inferior surface of the body of the hyoid
Action: Depress the hyoid and flexes head and neck at the spinal joints

Answer 1

Sternohyoid

Question 2

Origin: Lamina of the thyroid cartilage
Insertion: Inferior surface of the greater cornu of hyoid
Action: Depresses the hyoid and flexes head and neck at spinal joints

Answer 2

Thyrohyoid

Question 3

Origin: posterior surface of the manubrium and cartilage of the first rib
Insertion: Lamina of thyroid cartilage
Action: Depresses the thyroid cartilage and flex the head and neck at spinal joints

Answer 3

Sternothyroid

Question 4

Inferior belly: Superior border of the scapula to central tendon bound to the clavicle
Superior belly: Central tendon at clavicle to inferior surface of the body of the hyoid
Action: Depresses the hyoid bone and flex the head and neck of spinal joints

Answer 4

Omohyoid