Hyoid Group

Question 1

Digastric

Answer 1

O (Posterior Belly) : Mastoid notch of the temporal bone
O (Anterior Belly) : Digastric fossa at the inner surface of the inferior border of the mandible to the
I : Central tendon at body and greater cornu of hyoid bone
SMA :
1. Depress the mandible at TMJ
2. Flexes the head and neck at the spinal joints
RMA :
1. Elevates the hyoid bone

Question 2

Mylohyoid

Answer 2

O : Inner surface of mandible at mylohyoid line
I : Anterior surface of the body of the hyoid
SMA :
1. Depress the mandible at TMJ
2. Flexes the head and neck at the spinal joints
RMA :
1. Elevates the hyoid bone

Question 3

Stylohyoid

Answer 3

O : Posterior surface of styloid process of the temporal bone
I : Junction between body and greater cornu of hyoid bone
A : Elevates the hyoid bone

Question 4

Sternohyoid

Answer 4

O : Posterior surface of both manubrium and medial clavicle
I : Inferior surface of the body of the hyoid
A :
1. Depress the hyoid
2. Flexes the head and neck at the spinal joints

Question 5

Sternothyroid

Answer 5

O : Posterior surface of the manubrium and the cartilage of the 1st rib
I : Lamina of the thyroid cartilage
A :
1. Depresses the thyroid cartilage
2. Flexes the head and neck at the spinal joints

Question 6

Thyrohyoid

Answer 6

O : Lamina of the thyroid cartilage
I : Inferior surface of the greater cornu of the hyoid
A :
1. Depress the hyoid
2. Flexes the head and neck at the spinal joints

Question 7

Omohyoid

Answer 7

O (Inferior Belly) : Superior border of the scapula to the central tendon bound to the clavicle
O (Superior Belly) : Central tendon at clavicle to inferior surface of the body of the hyoid
A :
1. Depress the hyoid bone
2. Flexes the head and neck at the spinal joints