CHAPTER 8

MUSCLES OF MASTICATION

Overview and Topographic Anatomy

Muscles of Mastication

Vascular Supply

Nerve Supply

Clinical Correlate

Questions

Overview and Topographic Anatomy

GENERAL INFORMATION

Mastication is the process of chewing food in preparation for deglutition (swallowing) and digestion

All muscles of mastication originate on the skull and insert on the mandible

All muscles of mastication are innervated by the mandibular division of the trigeminal nerve

All muscles of mastication are derivatives of the 1st pharyngeal arch

Movements of the mandible are classified as:

• Elevation

• Depression

• Protrusion

• Retrusion

• Side-to-side (lateral) excursion

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