Diagastric

Question 1

Origin

Answer 1

Posterior belly:
Mastoid notch of temporal bone
Anterior belly:
Inner surface of the inferior boarder of mandible (the digastric fossa)

Question 2

Insertion

Answer 2

Both bellies:
Body of the hyoid bone via central tendon

Question 3

Function

Answer 3

Elevates the hyoid bone
Depresses the mandible at TMJ joint
Retracts the mandible at TMJ joint

Question 4

Nerve

Answer 4

Posterior belly:
Cranial nerve 7
Anterior belly:
Cranial nerve 5