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21 terms

MR LEAFS 2013 HEAD, FACE AND NECK MUSCLES

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Mentalis
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
Sternocleidomastoid
Origin: manubrium and medial 1/3 of clavicle
Insertion: mastoid process and lateral occipital bone
Action: rotation of the head and neck