Muscles- Head And Neck Flashcards
Zygomaticus minor
Action: retracts and elevates upper lip
Origin: zygomatic bone
Insertion: upper lip
Epicranial aponeurosis
Action: wrinkles forehead, raises eyebrows
Platysma
Action: tenses skin of neck, depresses mandible
Origin: thorax behind cartilage of second rib and scapula
Insertion: mandible, skin of cheek
Anterior scalene
Action: flex on of cervical spine
Origin: vertebrae c3-c6
Insertion: scalene tubercle, cranial crest of first rib
Buccinator
(Under masseter)
Action: compresses cheeks
Origin: maxilla and mandible
Insertion: orbicularis Oris
Depressor labii inferiors
Action: depresses lower lip
Origin: mandible
Insertion: skin of lower lip
Levator labii superioris
Action:elevates upper lip
Origin: orbit of eye
Insertion: orbicularis Oris
Mentalis
Action: elevates and protrudes lower lip
Origin: mandible
Insertion: skin of chin
Orbicularis Oris
Action: compresses, purses lips
Origin: maxilla and mandible
Insertion: lips
Risorius
Action: draws corner of mouth to the side
Origin: fascia surrounding parotid salivary gland
Insertion: angle of mouth
Occipitofrontalis
Action: raises eyebrows my wrinkles forehead
Origin: epicranial aponeurosis
Insertion: skin of eyebrows, bridge of nose
Orbicularis oculi
Action: closes eye
Origin: orbit
Insertion: Skin around eyelid
Corrugator supercilli
Action: pulls skin inferiorly and anteriorly, wrinkles brow
Origin: orbital rim
Insertion: eyebrow
*temporalis
*know for cat
Action: elevates mandible
Origin: temporal lines of skull
Insertion: mandible
*masseter
*know for cat
Action: Elevates mandible, closes jaws
Origin: zygomatic arch
Insertion: mandible
Superior oblique
Action: eye rolls, looks down, laterally
Origin: sphenoid around optic canal
Insertion: superior, lateral surface of eyeball