Musculus masseter

The video tutorial explores the anatomy, innovation, and features of a jaw muscle, focusing on its structure, attachments, and functions. It discusses the muscle's topographical environment, including its relationship with the parotid gland and its role in saliva secretion. The tutorial also covers the muscle's innervation by the nervus masset ericus and its function in jaw movement, particularly adduction and protrusion.

What are the two main parts of the masseter muscle?

• Pars anterior and pars posterior

• Pars superior and pars inferior

• Pars medialis and pars lateralis

• Pars superficialis and pars profunda

Where is the parotid gland located in relation to the masseter muscle?

• Medially

• Anteriorly

• Laterally

• Posteriorly

Which nerve is responsible for the innervation of the masseter muscle?

• Facial nerve

• Hypoglossal nerve

• Glossopharyngeal nerve

• Mandibular nerve

What is the primary function of the masseter muscle?

• Adduction of the jaw

• Abduction of the jaw

• Rotation of the jaw

• Flexion of the jaw

What happens when the superficial part of the masseter muscle contracts?

• The lower jaw is retracted

• The lower jaw is pushed forward

• The upper jaw is elevated

• The jaw is rotated