Functional Anatomy of the Muscles of Mastication

This interactive learning module aims to teach anatomy relating to the function of the four muscles of mastication; masseter, temporalis, lateral pterygoid and medial pterygoid.

Mastication

Mastication Process

What are the four muscles of mastication?

What other muscles are involved in the overall process of mastication?

Basic Anatomy

Temperomandibular Joint (TMJ)

Masseter

Temporalis

Lateral Pterygoid

Medial Pterygoid

Match the muscles

  • Masseter
  • Temporalis
  • Medial Pterygoid
  • Lateral pterygoid

Pick the muscle

Pick the muscle

Match the descriptions

–°ombine elements from the left column with the elements on the right
Deep layer of masseter
 
Inserts onto the medial surface of the mandibular ramus and the mandibular angle
Medial pterygoid
 
Originates from the medial surface of the zygomatic arch
Superior head of lateral pterygoid
 
Originates from the infratemporal surface and crest of sphenoid
Temporalis
 
Inserts onto the medial, apex, anterior and posterior surfaces of coronoid process and the anterior surface of the mandibular ramus

Muscle Function

Individual Muscles

Pick the muscle

Pick the muscle

Pick the muscle

Summary of Movements

Fill in the muscle

Movements of Mastication

Muscle Function During Mastication

Important Points

Chewing

Pick the movement

Match the movements

–°ombine elements from the left column with the elements on the right
Protraction
 
Temporalis
Elevation
 
Masseter and temporalis
Retraction
 
Buccinator, the tongue, orbicularis oris
Holding food bolus between teeth
 
Pterygoid muscles

Summary

References

Reference List