The Muscles of Mastication Flashcards
name the muscles of mastication
- temporalis
- masseter
- medial pterygoid
- lateral pterygoid
what are the bony attachments of the temporalis muscle?
- coronoid process
- temporal fossa of skull
what action would it have on the mandible when:
a) the anterior fibres of the temporalis contract?
b) the posterior fibres of the temporalis contract?
a) moves the mandible dorsocranially (elevation).
b) pulls the mandible posteriorly (retrusion).
what are the bony attachments of the masseter muscle?
- zygomatic arch
- outer surface of the ramus and coronoid process of mandible
what is the action of the masseter muscle?
elevation and protrusion of the mandible
both pterygoid muscles attach to?
the lateral pterygoid plate
to which part of the mandible does the medial pterygoid muscle attach?
triangular impression on the medial surface of the mandible
when the two lateral pterugoid muscles contract they cause?
protrusion and depression
when the lateral pterygoid muscle contracts with the medial pterygoid of the same side it causes?
swinging of the mandible
when the two medial pterygoid muscles contract they cause?
protrusion and elevation of the mandible
what is the only division of the trigeminal nerve that carries both sensory and motor fibres?
mandibular (V3)
what nerve enters through the mandibular foramen?and what is its function?
- inferior alveolar nerve (sensory branch of mandibular nerve).
- provides sensory innervation to the mandibular area.
