Muscle Anatomy: Temporalis Muscle

Fan shape across the temporal fossa of the temporal bone.

Into the coronoid process of the mandible and down the anterior border of the ramus.

Elevates the mandible, closing the jaw. Contraction of the posterior fibers retracts the mandible.

<p>Temporalis</p> Signup and view all the answers

<p>Medial surface of the lateral pterygoid plate of the sphenoid bone, the lateral portion of the palatine bone, and the maxillary tuberosity.</p> Signup and view all the answers

<p>Into the interior surface of the angle of the mandible.</p> Signup and view all the answers

<p>Elevates the mandible.</p> Signup and view all the answers

<p>Internal Pterygoid</p> Signup and view all the answers

<p>Two portions: Superficial portion from the zygomatic process of the maxilla and from the anterior two-thirds of the lower border of the zygomatic arch; Deep from the medial aspect and inferior border of the posterior one-third of the zygomatic arch.</p> Signup and view all the answers

<p>Superficial portion into the angle and lower border of the mandible. Deep into the upper section of the ramus and the lateral surface of the coronoid process.</p> Signup and view all the answers

<p>Strong elevator of the jaw.</p> Signup and view all the answers

<p>Masseter</p> Signup and view all the answers

<p>Superior from the lateral surface of the greater wing of the sphenoid bone; Inferior from the lateral surface of the lateral pterygoid plate.</p> Signup and view all the answers

<p>Superior into the articular capsule of the temporomandibular joint; Inferior into the neck of the condyle of the mandible.</p> Signup and view all the answers

<p>Opens the jaw by depressing the mandible.</p> Signup and view all the answers

<p>External Pterygoid</p> Signup and view all the answers

<p>Zygomatic bone</p> Signup and view all the answers

<p>Corners of the mouth</p> Signup and view all the answers

<p>Lifts the corners of the mouth upward and backward, as in smiling.</p> Signup and view all the answers

<p>Zygomatic Major</p> Signup and view all the answers

<p>No skeletal attachment, from the muscle fibers that surround the mouth, maxilla, and mandible.</p> Signup and view all the answers

<p>Into itself and the surrounding skin around the lips.</p> Signup and view all the answers

<p>Closing the lips and protruding/puckering them.</p> Signup and view all the answers

<p>Orbicularis Oris</p> Signup and view all the answers

<p>Incisive fossa of the mandible</p> Signup and view all the answers

<p>Skin of the chin</p> Signup and view all the answers

<p>Wrinkles the skin of the chin and protrudes the lower lip.</p> Signup and view all the answers

<p>Mentalis</p> Signup and view all the answers

<p>Alveolar processes of the maxilla and the mandible, and the pterygomandibular raphe.</p> Signup and view all the answers

<p>Into the corners of the mouth, becoming part of the muscles that surround the mouth.</p> Signup and view all the answers

<p>Compresses the cheeks against the teeth to assist during mastication. Assists in blowing air out of the mouth.</p> Signup and view all the answers

<p>Buccinator</p> Signup and view all the answers

<p>Genial tubercle in the center of the lingual of the mandible</p> Signup and view all the answers

<p>Fans out to insert in the inferior surface of the tongue and to the hyoid bone.</p> Signup and view all the answers

<p>Most of the work of the tongue. Protrudes the tongue and retracts or depresses the tongue.</p> Signup and view all the answers

<p>Genioglossus</p> Signup and view all the answers