Chewing muscle ( lat. Musculus masseter ) starts from the lower edge of the zygomatic arch in two parts - superficial and deep [2] .
| Chewing muscle | |
|---|---|
| lat musculus masseter | |
 Chewing muscle is highlighted in red | |
 Topographic and anatomical relationships of the masticatory muscle | |
| Start | zygomatic arch and upper jaw |
| Attachment | coronoid process and branch of the lower jaw |
| Blood supply | aa. masseterica, transversa faciei |
| Innervation | mandibular nerve (branch of the trigeminal nerve ) |
| Function | height (for example, in closing the mouth) and retraction in the lower jaw |
| Antagonist | Subcutaneous muscle |
| Catalogs | |
| |
The surface part ( lat. Pars superficialis ) begins with tendon bundles from the front and middle sections of the zygomatic arch; the deepest part ( lat. pars profunda ) - from the middle and back sections of the zygomatic arch. Bunches of muscle fibers of the surface part follow obliquely down and back, deep - down and anteriorly. Both parts of the chewing muscle are connected and attached to the outer surface of the branches of the lower jaw and to its corner in the area of ββchewing tuberosity [2] .
Function
In mammals, chewing muscles are well developed, which ensures the capture and mechanical processing of food, and in herbivorous forms, the chewing muscle itself is the strongest, and in carnivores, the temporal muscles are responsible for the strength of the bite.
Raises the lower jaw, participates in the advancement of the jaw [3] .
Notes
- β 1 2 Foundational Model of Anatomy
- β 1 2 R.D. Sinelnikov, J.R. Sinelnikov. Muscles of the head // Atlas of human anatomy. - 2nd. - M. :: Medicine, 1996. - T. 1. - S. 241. - 344 p. - 10,000 copies. - ISBN 5-225-02721-0 .
- β M.G. Pryves, N.K. Lysenkov, V.I. Bushkovich. Muscles and fascia of the head // Human anatomy. - 11th edition. - St. Petersburg. :: Hippocrates, 1998 .-- S. 186-187. - 704 s. - ISBN 5-8232-0192-3 .