BIO 290 Lecture Notes - Lecture 5: Inferior Oblique Muscle, Oculomotor Nerve, Facial Nerve
Document Summary
Muscles of mastication - all arch 1 derived. Greater wing of pterygoid process of sphenoid bone. Maxilla, palatine, and pterygoid process of sphenoid bone. Muscles of facial expression - all arch 2 derived. Fibers run longitudinally vertically in tongue transversely, and. Occipital bone and spinous processes of cervical and thoracic vertebrae. Acromion process, spine of scapula and lateral clavicle. Platysma - arch 2 derived (superficial neck muscle) Cervical and thoracic spinous processes and nuchal ligament. Cervical transverse processes, occipital bone, and mastoid process. 6-7 segments superior to origin and occipital bone. Unilateral: laterally flex and rotate head and neck. Anterior belly of the digastric - arch 1 (suprahyoid muscle) Medial surface of mandible from symphysis to molar teeth. Posterior belly digastric - arch 2 (suprahyoid muscle) Depresses mandible; with anterior digastric elevates and steadies hyoid during swallowing. Median raphe of pharynx (longitudinal tendinous seam on posterior pharynx)
