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19 Cards in this Set
- Front
- Back
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Muscles of Facial expression
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6
orbicularis oculi/oris, zygomaticus major, buccinator, frontalis, occipitalis |
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orbicularis oculi
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closes the eyes tightly
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orbicularis oris
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puckers lips; kissing muscle
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zygomaticus major
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pulls the angle of the mouth into a smile
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buccinator
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puts mouth into position for blowing; brings the cheeks in
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frontalis
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originates from the anterior frontal border of the galae aponeurotica; raises the eyebrows
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occipitalis
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attaches to the galea aponeurotica, wiggles the ears
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galea aponeurotica
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connective tissue over the top of the head
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muscles of mastication
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all innervated by mandibular branch (V3) of CN V
Masseter, Temporalis, Lateral/medial pterygoid |
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masseter
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origin: Zygomatic arch
insertion: Mandible at its angle action: Elevates the mouth |
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temporalis
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origin: Temporal bone
insertion: Tendon goes behind zygomatic arch, inserts onto coronoid process action: Allows mandible to eleveate and retract (from jutting pulls it back) |
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Lateral Pterygoid
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origin: lateral side of the lateral Pterygoid plate
Insertion: top part of mandible, the condyloid process of the mandible. Action: depresses the mandible, opens the mouth; and protracts the mandible, jutting it forward. |
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Medial Pterygoid
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origin: lateral pterygoid process, medial side
insertion: mandible angle from medial side, beneath masseter. forms sling around mandible angle action: elevates the mandible, moves from side/side. |
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Muscles of the Neck
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Sternocleidomastoid, Suprahoid 4, INfrahyoid 4
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Sternocleidomastoid
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origin: sternum/clavicle
insertion: occipital bone, mastoid process action: rotates head to opposite side nerve: 11th CN |
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Suprahyoid muscles
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All shift the hyoid to aid in speech and swallowing
Mylohyoid - floor of mouth Digastric, anterior belly Digastric, posterior belly Stylohyoid Geniohyoid - inserts on inside mandible |
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infrahyoid muscles
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All act on the hyoid from below.
sternohyoid omoyoid sternothyroid thyrohyoid |
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Hyoid Muscles (infra and supra)
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Elevate, Depress, protract, and retract the hyoid bone. Aid in phonation and swallowing. Innervated by CN V, VII and XII, and C1-3
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Mandible Movements
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Depression: opening
Protraction: jutting the teeth out Retraction: bringing the jaw back in Side/Side |
