ANAT 101 Lecture Notes - Lecture 11: Iliotibial Tract, Tensor Fasciae Latae Muscle, Iliacus Muscle

• School: Drexel University
• Department: Anatomy
• Course: ANAT 101
• Professor: Michael Bruneau

Document Summary

Orbicularis oculi: origin: medial orbital margin, action: closes eye. Insertion: lateral aspect of head or circular path around orbit. Occipitofrontals: two parts: frontal belly and occipital belly. Temporalis: origin: fascia of temporal bone, action: elevates mandible. Epicranial aponeurosis: origin: frontalis muscle, sheet of connective tissue. Orbicularis oris: origin: upper lip maxillary bone part of mandible, action: closes mouth. Masseter: origin: zygomatic bone of cheek, action: pull of attachment point on mandible to chew. Depressor anguli oris: origin: mandible, action: pulls muscle laterally. Insertion: hyoid bone (inferior border: action: depresses hyoid bone. Insertion: hyoid: action: pull down, depresses hyoid. Platysma: origin: pec major and deltoid muscle. Insertion: lower portion of mandible: action: open mouth and tenses skin of neck. Sternocleidomastoid origin: origin: sternum and clavicle, action: contralateral rotation (turn head left = right contraction) Scalenes: origin: transverse process of cervical vertebrae, action: elevate rib during forced inspiration.