Masseter muscle

This video tutorial covers the masseter muscle, a key muscle in mastication. It explains the muscle's origin, insertion, innervation, and function. The masseter has superficial and deep parts, originating from the zygomatic arch and inserting on the mandibular angle and Ramis. It is innervated by the masseteric nerve and plays a crucial role in jaw closure and protrusion. The tutorial also highlights the relationship with the parotid gland and temporomandibular joint. Additional resources for further learning are provided.

What are the two parts of the masseter muscle?

• Upper and lower

• Medial and lateral

• Anterior and posterior

• Superficial and deep

Where do the superficial and deep parts of the masseter muscle originate?

• Maxilla

• Temporal bone

• Zygomatic arch

• Mandibular angle

Which nerve supplies the masseter muscle?

• Trigeminal nerve

• Hypoglossal nerve

• Facial nerve

• Masseteric nerve

What is the primary function of the masseter muscle?

• Elevating the mandible

• Depressing the mandible

• Retracting the mandible

• Rotating the mandible

How does the masseter muscle contribute to jaw movement?

• It stabilizes the hyoid bone

• It retracts the mandible

• It protrudes the mandible

• It depresses the mandible