Face, Head & Neck Muscles questions and answers latest 2023

Face, Head & Neck Muscles questions and answers latest 2023Mentalis Origin: body of the mandible Insertion: skin of the chin Action: elevates, protracts, and depresses lower lip Depressor labii inferioris Origin: inferior margin of the mandible Insertion: orbicularis oris muscle Action: depresses lower lip Orbicularis oris Origin: medial planes of maxillae and mandible Insertion: lips Action: compresses and protrudes the lips Buccinator Origin: aveolar processes of the maxillae and mandible Insertion: corner of the mouth Action: compress cheeks risorious Origin: masseter muscle Insertion: corner of mouth Action: retracts corner of the mouth Levator labii superioris Origin: infraorbital maxillae Insertion: upper lip Action: elevates upper lip Zygomaticus major Origin: zygomatic bone Insertion: corner of the mouth Action: draws corner of the mouth Zygomaticus minor Origin: zygomatic bone Insertion: orbicularis oris muscle Action: elevates upper lip Orbicularis Oculi Origin: medial orbital margin Insertion: skin around the orbit Action: closes eyelid Nasalis Origin: superior maxilla Insertion: nasal cartilage Action: draws nasal ala medially Epicranius compound structure containing epicranial aponeurosis, occipitofrontalis, occipital belly, and the frontal belly Galea aponeurosis connective tissue portion of epicranius occipitalis Origin: occipital bone Insertion: epicranial aponeurosis Action: retracts scalp frontalis Origin: epicranial aponeurosis Insertion: skin of forhead and eyebrows Action: elevates eyebrows and scalp Temporalis Origin: temporal fossa of cranium Insertion: coronoid process of mandible Action: elevates mandible Masseter Origin: zygomatic arch Insertion: lateral ramus of the mandible Action: elevates and protracts mandible Platysma Origin: fascia of shoulder Insertion: mandible, cheek, and orbicularis oris Action: depresses mandible, tenses skin of neck Anterior Scalene Origin: transverse process of vertebrae C4-C6 Insertion: 1st rib Action: elevates 1st rib, laterally flexes neck Middle Scalene Origin: transverse process of vertebrae C4-C6 Insertion: 1st rib Action: elevates 1st rib, laterally flexes neck Posterior Scalene Origin: transverse process of vertebrae C4-C6 Insertion: 2nd rib Action:elevates 2nd rib, laterally flexes neck