Mastication

Authors

Affiliations

Nate Yomogida, PT, DPT

Doctor of Physical Therapy

B.S. in Kinesiology

Chloë Kerstein, PT, DPT

Doctor of Physical Therapy

B.A. in Neuroscience

to read

• Ch11 Kinesiology of Mastication and Ventilation¹

Muscles

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Table 1: Primary Muscles of mastication

Muscle	Origin	Insertion	Innervation	Action
Lateral pterygoid
Masseter
Medial pterygoid
Temporalis

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Table 2: Accessory Muscles of mastication

Muscle	Origin	Insertion	Innervation	Action
Digastric				Hyoid: Elevation (during swallowing) TMJ: Assists with opening mandible
Geniohyoid
Mylohyoid				Oral floor: Tighten, Elevation Hyoid: Draws forward (during swallowing) TMJ: Assists with opening mandible, Side-to-side movement during mastication
Stylohyoid				Hyoid: Elevation (during swallowing) TMJ: Assists with opening mandible

References

1.

Neumann DA, Kelly ER, Kiefer CL, Martens K, Grosz CM. Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation. 3rd ed. Elsevier; 2017.