Suprahyoid Muscles

Question 1

Which belly of the digastric muscle originates from the mastoid notch of the temporal bone to the central tendon at body and greater cornu of hyoid bone?

Answer 1

Digastric Posterior belly

Question 2

Origin of the anterior belly: digastric fossa at the inner surface of the inferior border of the mandible to the central tendon at body and greater cornu of hyoid bone

Answer 2

Digastric muscle

Question 3

List the standard mover actions and the reverse action for the digastric muscle

Answer 3

Standard mover actions: depresses mandible at TMJ and flexes head and neck at spinal joints
Reverse actions: elevates hyoid bone

Question 4

Origin: Inner surface of mandible at Mylohyoid line
Insertion: Anterior surface of the body of the hyoid

Answer 4

Mylohyoid

Question 5

If the Mylohyoid muscle’s standard action is to depress the mandible at TMJ and flex the head at neck at spinal joints, then what is its reverse action?

Answer 5

Reverse action - Elevates the hyoid bone

Question 6

Origin: posterior surface of styloid process of the temporal bone
Insertion: Junction between body and greater cornu of hyoid bone
Action: elevates hyoid bone

Answer 6

Stylohyoid Muscle

Question 7

Origin: inner surface of the mandible at the inferior mental spine
Insertion: anterior surface of the body of the hyoid

Answer 7

Geniohyoid Muscle

Question 8

Geniohyoid Muscle’s standard action is to depress mandible at TMJ and flexes head and neck at spinal joints, what is its reverse action?

Answer 8

It elevates the mandible