Muscles- Head And Neck Flashcards by shannon hazard

Zygomaticus minor

Action: retracts and elevates upper lip
Origin: zygomatic bone
Insertion: upper lip

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Epicranial aponeurosis

Action: wrinkles forehead, raises eyebrows

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Platysma

Action: tenses skin of neck, depresses mandible
Origin: thorax behind cartilage of second rib and scapula
Insertion: mandible, skin of cheek

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Anterior scalene

Action: flex on of cervical spine
Origin: vertebrae c3-c6
Insertion: scalene tubercle, cranial crest of first rib

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Buccinator

(Under masseter)
Action: compresses cheeks
Origin: maxilla and mandible
Insertion: orbicularis Oris

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Depressor labii inferiors

Action: depresses lower lip
Origin: mandible
Insertion: skin of lower lip

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Levator labii superioris

Action:elevates upper lip
Origin: orbit of eye
Insertion: orbicularis Oris

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Mentalis

Action: elevates and protrudes lower lip
Origin: mandible
Insertion: skin of chin

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Orbicularis Oris

Action: compresses, purses lips
Origin: maxilla and mandible
Insertion: lips

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Risorius

Action: draws corner of mouth to the side
Origin: fascia surrounding parotid salivary gland
Insertion: angle of mouth

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Occipitofrontalis

Action: raises eyebrows my wrinkles forehead
Origin: epicranial aponeurosis
Insertion: skin of eyebrows, bridge of nose

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Orbicularis oculi

Action: closes eye
Origin: orbit
Insertion: Skin around eyelid

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Corrugator supercilli

Action: pulls skin inferiorly and anteriorly, wrinkles brow
Origin: orbital rim
Insertion: eyebrow

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*temporalis

*know for cat
Action: elevates mandible
Origin: temporal lines of skull
Insertion: mandible

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*masseter

*know for cat
Action: Elevates mandible, closes jaws
Origin: zygomatic arch
Insertion: mandible

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Superior oblique

Action: eye rolls, looks down, laterally
Origin: sphenoid around optic canal
Insertion: superior, lateral surface of eyeball

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Inferior oblique

Action: eye rolls, looks up, laterally
Origin: maxilla at anterior portion of orbit
Insertion: inferior, lateral surface of eyeball

Lateral rectus

Action: eye looks lateral
Origin: sphenoid around optic canal
Insertion: lateral surface of eyeball

Superior rectus

Action: eye looksup
Origin: sphenoid around optic canal
Insertion: superior surface of eyeball

Medial rectus

Action: eye looks medially
Origin: sphenoid around optic canal
Insertion: medial surface of eyeball

Inferior rectus

Action: eye looks down
Origin: sphenoid around optic canal
Insertion: inferior, medial surface of eyeball

Sternocleidomastoid

Action: flex neck, bends head towards shoulder, turns face to opposite side
Origin: clavicle, manubrium
Insertion: mastoid of skull, superior nuchal line

Thyrohyoid

Action: elevates thyroid, depresses hyoid bone
Origin: thyroid cartilage of larynx
Insertion: hyoid bone

Stylohyoid

Style hyoid: action: elevates larynx
Origin: stylized process of temporal bone
Insertion: hyoid bone

Sternohyoid

Action: depresses hyoid bone and larynx Origin: dorsal surface of manubrium and first costal cartilage Insertion: thyroid cartilage of larynx

Sternohyoid

Action: depresses hyoid bone and larynx Origin: clavicle and manubrium Insertion: hyoid bone

Omohyoid

Action: depresses hyoid bone and larynx Origin: superior border of scapula Insertion: hyoid bone

*mylohyoid

*know for cat Action: elevates floor of mouth and hyoid bone, depresses mandible Origin: mylohyoid line of mandible Insertion: median connective tissue brand, runs to hyoid bone

Geniohyoid

Action: depresses mandible Or elevates larynx, pulls hyoid bone anteriorly Origin: median surface if mandible Insertion: hyoid bone

*digastric

*know for cat Action: depresses mandible or elevates larynx Origin: mandible, mastoid Insertion: hyoid bone

Styloglossus

Action: retracts tongue, elevates side Origin: sty loud process of temporal bone Insertion: tip and base of tongue

Palatoglossus

Action: elevates tongue, depresses soft palate Origin: soft palate Insertion: side of tongue

Hyoglossus

Action: depresses and retracts tongue Origin: hyoid bone Insertion:side of tongue

Genioglossus

Action: depresses and protracted tongue Origin: mandible Insertion: body of tongue, hyoid bone

Lateral pterygoid

Action: depresses and protects mandible to open mouth Origin: sphenoid bone Insertion: mandible, temporomandibular joint

Medial pterygoid

Action: elevates mandible Origin: lateral pterygoid plate Insertion: mandible

Middle scalene

Action: elevation 1st rib, rotator, flexion Origin: vertebrae c2-c7 Insertion: 1st rib

*multifundus

Action: extension, rotation Origin: sacrum, iliac crest Insertion: spinous process

Posterior scalene

Action: elevation 1st and 2nd ribs Origin: cervical vertebrae c2-c7 Insertion: 1st and 2nd ribs

Quadratus lumborum

Actions: flexion if vertebral column, depression of thoracic rib cage Origin: iliac crest, iliolumbar ligament Insertion: last rib, lumbar vertebrae

Zygomaticus major

Action: elevates and retracts courier of mouth Origin: zygomatic bone Insertion: angle of mouth