Origin and Insertion
Zygomatic arch to angle of mandible
What is the origin and insertion of the masseter?
Elevates the mandible
What is the action of the Masseter
Masseter
Which muscle of mastication is prominent when the jaw is clenched?
Muscle often involved in TMJ dysfunction
What issue is the Lateral Pterygoid know to affect
Strongest muscle by weight in the body
What is the Masseter?
Temporal fossa to coronoid process of mandible
What is the Origin and insertion of the Temporalis
Retracts and elevates the mandible
What is the action of the Temporalis
Mandibular branch of trigeminal nerve (CN V3)
What nerve innovates the muscles of mastication?
Bruxism affects this muscle
What is the Masseter
This muscle has two heads: superior and inferior
What is the Lateral Pterygoid?
Medial surface of lateral pterygoid plate to medial surface of mandible
What is the Origin and Insertion of medial pterygoid?
Elevates and protrudes the mandible
What is the action of the Medial Pterygoid
Temporalis, Masseter, Medial pterygoid, Lateral pterygoid
What are the names of the muscles of mastication?
Pain in temporal region may indicate issues with this muscle
What is the Temporalis?
This muscle fans out like a fan
What is the Temporalis?
Lateral surface of lateral pterygoid plate to neck of mandible
What is the Origin and Insertion of Lateral Pterygoid?
Depresses and protrudes the mandible
What is the action of the lateral Pterygoid
Chewing
What does mastication mean?
This muscle may be affected in mandibular fractures
What is the Medial Pterygoid?
This muscle works with its lateral counterpart for chewing
What is the Medial Pterygoid?
Maxillary tuberosity to medial surface of mandible
What is an accessory origin of the Medial Pterygoid?
Moves mandible side to side
Jointly what do the Pterygoid muscles do?
4
How many muscles of mastication are there?
Weakness in mastication may indicate damage to this nerve
What is the mandibular branch of CN V?
These muscles are all derived from the first pharyngeal arch
What are the muscles of Mastication?