01:377:303 Lecture Notes - Lecture 11: Lateral Pterygoid Muscle, Stylohyoid Muscle, Hyoid Bone

• School: Rutgers University
• Department: Exercise Scienc
• Course: 01:377:303
• Professor: E Manfredonia

Document Summary

Origin: palatine bone and tuberosity of maxilla. Insertion: medial surface of ramus and mandibular angle if mandible is depressed, this muscle will limit protrusion; Decelerates the posterior movement of the condyle with closing. Origin: superficial and deep; superficial: anterior and inferior part of zygomatic arch and maxillary process; deep: deep side of zygomatic arch. Insertion: superficial: angle and lateral ramus of mandible; deep: superior half of the ramus and lateral surface of coronoid process. Digastric: anterior and posterior bellies and a central tendinous portion connected to the hyoid bone via a fibrous loop. Origin: anterior: digastric fossa of the mandible along the lower border lateral to the inner surface of the mandibular symphysis; posterior: mastoid notch medial to the mastoid process. Insertion: anterior-intermediate tendon connects the anterior and posterior bellies, splints the stylohyoid muscle, and is attached to the hyoid bone by a fibrous bone by a fibrous ring which acts like a pulley forming an obtuse angle.