Suprahyoid muscles Flashcards
Where are the suprahyoid muscles situated?
Above the hyoid bone
Where is the hyoid bone?
Beneath the mandible in soft tissue in the throat
Where are the infrahyoid muscles situated
Beneath the hyoid bone
What is the action of the suprahyoid muscles?
The opening of the mouth and swallowing actions
What are the 3 suprahyoid muscles called?
Anterior belly of digastric muscle
Mylohyoid muscle
Geniohyoid muscle
Which cranial nerve innervated the anterior belly of digastric muscle?
V (trigeminal nerve)
Which of the cranial nerves innervates the mylohyoid muscle?
V (trigeminal nerve)
Which of the cranial nerves innervates the geniohyoid muscle?
XII (hypoglossal)
What is the point of origin of the anterior belly of digastric muscle?
hyoid bone
What is the point of insertion of the anterior belly digastric muscle?
Inner surface of mental symphysis of the mandible
What is the action of the anterior belly of digastric muscle?
to help lift the hyoid muscle and larynx to aid the swallowing action and pulls the mandible down to open the mouth
Which suprahyoid muscles is responsible for pulling the mandible down to open the mouth?
Anterior belly of digastric muscle
What is the point of origin of the mylohyoid muscle?
hyoid bone
What is the point of insertion of the mylohyoid muscle?
Mylohyoid line of inner surface mandible, fusing the midline together to form the floor of the mouth
What is the action of the mylohyoid muscle?
Lift the hyoid bone and larynx to assist the swallowing action and open the mouth
