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29 Cards in this Set
- Front
- Back
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End of muscle attached to the least movable structure
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origin
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End of muscle attached to the more movable structure
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insertion
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Epicranial - frontal belly
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O: epicranial aponeurosis
I: eyebrow and root of nose A: surprise |
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Epicranial - occipital belly
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O: occipital and temporal bone
I: epicranial aponeurosis A: surprise |
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Orbicularis oculi
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O: orbital rim, frontal and maxillary bones
I: lateral region of eye, some encircle eye A: closing eyelid |
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Corrugator supercilii
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O: frontal bone
I: eyebrow A: frowning |
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Orbicularis oris
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O: encircle mouth
I: angle of mouth A: closing or pursing lips |
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buccinator
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O: maxilla, mandible and pterygomandibular raphe
I: angle of mouth A: chewing |
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risorius
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O: fascia superficial to masseter muscle
I: angle of mouth A: smiling widely |
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levator labii superioris
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O: maxilla
I: upper lip A: raising upper lip |
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levator labii superioris alaeque nasi
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O: maxilla
I: ala of nose and upper lip A: raising upper lip and dilating nostrils in a sneer |
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zygomaticus major
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O: zygomatic bone
I: angle of mouth A: smiling |
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zygomaticus minor
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O: zygomatic bone
I: upper lip A: raising upper lip |
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levator anguli oris
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O: maxilla
I: angle of mouth A: smiling |
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depressor anguli oris
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O: mandible
I: angle of mouth A: frowning |
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depressor labii inferioris
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O: mandible
I: lower lip A: lowering lower lip |
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mentalis
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O: mandible
I: chin A: raising chin and protruding lower lip |
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platysma
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O: clavicle and shoulder
I: mandible and muscles of mouth A: grimacing |
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sternocleidomastoid
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O: medial portion of clavicle and superior and lateral surfaces of sternum
I: mastoid process of temporal bone A: 1 side contraction - head and neck bend to same side and face and front of neck rotate to opposite side, 2 sides contract - head flex at neck and extension at junction between head and neck |
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trapezius
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O: external surface of occipital bone and posterior midline of cervical and thoracic regions
I: lateral third of clavicle and parts of scapula A: lift clavicle and scapula when shoulders are shrugged |
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masseter - superficial head
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O: anterior two thirds of lower border of zygomatic arch
I: angle of mandible A: elevation of mandible (during jaw closing) |
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masseter - deep head
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O: posterior one third and medial surface of zygomatic arch
I: ramus of mandible A: elevation of mandible (during jaw closing) |
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temporalis
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O: temporal fossa
I: coronoid process of mandible A: elevation of mandible (during jaw closing) and retraction of mandible (lower jaw backward) |
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medial pterygoid
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O: pterygoid fossa of sphenoid bone
I: angle of mandible A: elevation of mandible (during jaw closing) |
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lateral pterygoid - superior head
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O: greater wing of sphenoid bone
I: pterygoid fovea of mandible A: 1 side contraction - lateral deviation of mandible (shift lower jaw to opposite side), 2 side contraction - protrusion of mandible (lower jaw forward) |
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lateral pterygoid - inferior heads
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O: lateral pterygoid plate from sphenoid bone
I: pterygoid fovea of mandible A: slight depression of mandible (during jaw opening), 1 side contraction - lateral deviation of mandible (shift lower jaw to opposite side), 2 side contraction - protrusion of mandible (lower jaw forward) |
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name 4 suprahyoid muscles
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digastric
mylohyoid geniohyoid stylohyoid |
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name 4 infrahyoid muscles
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sternothyroid
sternohyoid omohyoid thyrohyoid |
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digastric - anterior belly
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O: intermediate tendon
I: medial surface of mandible A: elevation of hyoid bone and larynx, |
