Muscles of Mastication Flashcards
Which cranial nerve supplies the Muscles of Mastication?
Trigeminal Nerve (5th) (V)
Name the 4 muscles of mastication
Temporalis
Masseter
Lateral Pterygoid
Medial Pterygoid
What is the point of origin of the Temporalis?
Temporal Bone
What is the point of insertion of the Temporalis?
Coronoid Process of the mandible, passing under the Zygomatic arch
What is the action of the Temporalis?
Pulls the mandible backwards and closes the mouth
What is the point of origin of the Masseter?
Zygomatic arch (outer surface)
What is the point of insertion of the Masseter?
Outer surface of the ramus and angle of the mandible
What is the action of the Masseter?
Closes the mouth
What is the point of origin of the Lateral Pterygoid?
Lateral Pterygoid plate
What is the point of insertion of the Lateral Pterygoid?
Condyle/Meniscus
What is the action of the Lateral Pterygoid?
one muscle contracting pulls the mandible to the opposite side - side to side movement
What is the point of origin of the Medial Pterygoid?
Medial Pterygoid plate
What is the point of insertion of the Medial Pterygoid?
Inner surface of the ramus and angle of the mandible
What is the action of the Medial Pterygoid?
Closes the mouth
Which muscles are responsible for mouth opening and swallowing?
Suprahyoid Muscles
