Muscles of Chewing and Swallowing
Muscles of Chewing and Swallowing
Muscles of Chewing and Swallowing
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Hyoid <strong>Muscles</strong> – Suprahyoid Group<br />
• aspects <strong>of</strong> chewing, swallowing, <strong>and</strong> vocalizing<br />
• eight pairs <strong>of</strong> hyoid muscles associated with hyoid bone<br />
• digastric - opens mouth widely<br />
• geniohyoid – depresses m<strong>and</strong>ible<br />
• mylohyoid – elevates floor <strong>of</strong> mouth at beginning <strong>of</strong> swallowing<br />
• stylohyoid – elevates hyoid<br />
Suprahyoid<br />
group<br />
Levator scapulae<br />
Infrahyoid<br />
group<br />
Sternocleidomastoid<br />
Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.<br />
Digastric:<br />
Anterior belly<br />
Posterior belly<br />
Stylohyoid<br />
Mylohyoid<br />
Sternohyoid<br />
Omohyoid:<br />
Superior belly<br />
Inferior belly<br />
Superficial Deep<br />
(a) Anterior view<br />
Hyoid bone<br />
Common carotid artery<br />
Internal jugular vein<br />
Thyrohyoid<br />
Sternothyroid<br />
Clavicle<br />
Infrahyoid<br />
group<br />
Figure 10.10a<br />
10-4
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