Muscles of mastication Flashcards
The muscle which circumscribes the mouth and the bulk of the lips is what?
The orbicularis oris
the temporalis, masseter, lateral pterygoid and medial pterygoid muscles are collectively known as what?
muscles of mastication
the origin of the temporalis muscle is where?
temporal fossa
where does the masseter muscle have its Orign
zygomatic arch
give the name of the muscle which forms the floor of the mouth and give the nerve supply for this muscle
the mylohyoid muscle. it is supplied by a branch of the mandibular nerve
where does the medial pterygoid muscle have its orign
medial surface of the lateral pterygoid plate
where does the lateral pterygoid muscle have its origin
lateral surface of lateral pterygoid plate
what is the motor nerve supply to the obicularis oris
facial nerve
what is the nerve supply to the four muscles of mastication
the mandibular division of the trigeminal nerve
what is the action of the lateral pterygoid
depressing mandible
Insertion of Masseter
outer surface of the ramus
Insertion of lateral pterygoid
pterygoid fossa on neck of condyle
What is the insertion of the medial pterygoid
inner surface of the ramus
Origin of mylohyoid
Mylohyoid line
Insersion of mylohyoid
hyoid bone
