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10 Cards in this Set
- Front
- Back
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Platysma
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O: superficial fascia over upper part of deltoid and pectoralis major
O: Mandible, skin and muscles over mandible Innervation: Facial Nerve (VII) Action: depresses lower jaw and lip and angle of mouth, wrinkles skin of neck |
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Sternocleidomastoid
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O: Manubrium of the sternum, medial 1/3 of clavicle
I: mastoid process and lateral 1/2 of superior nuchal line Innervation: Accessory Nerve (XI) and C2-C8 Action: turns face toward opposite side, acting together they flex head and raise thorax |
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Digastric
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-A suprahyoid muscle
O: Anterior belly from digastric fossa of the mandible, posterior belly from the mastoid notch I: intermediate tendon attached to body of hyoid Innervation: Posterior belly by Facial nerve (VII), anterior belly by Trigeminal nerve (V3, mylohyoid br.) Action: elevates hyoid and floor of mouth, depresses mandible |
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Mylohyoid
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-a suprahyoid muscle
O: mylohyoid line of mandible I: median raphe and body of hyoid bone Innervation: Trigeminal nerve (V3, mylohyoid br) Action: elevates hyoid and floor of mouth, depresses mandible |
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Stylohyoid
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-a suprahyoid muscle
O: styloid process I: body of hyoid Innervation: Facial nerve (VII) Action: elevates hyoid |
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Geniohyoid
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-a suprahyoid muscle
O: genial tubercle of mandible I: body of hyoid Innervation: C1 via Hypoglossal nerve (XII) |
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Sternohyoid
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-an infrahyoid muscle
O: manubrium of sternum and medial end of clavicle O: body of hyoid Innervation: Ansa cervicalis Action: depresses hyoid and larynx |
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Sternothyroid
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-an infrahyoid muscle
O: manubrium of sternum, first costal cartilage I: oblique line of thyroid cartilage Innervation: Ansa cervicalis Action: depresses hyoid and larynx |
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Thyrohyoid
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-an infrahyoid muscle
O: oblique line of thyroid cartilage I: body and greater horn of hyoid Innervation: C1 via Hypoglossal (XII) Action: depresses hyoid and elevates larynx |
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Omohyoid
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-an infrahyoid muscle
O: inferior belly from suprascapular notch and suprascapular ligament, superior belly from intermediate tendon I: inferior belly to intermediate tendon, superior belly to body of hyoid Innervation: Ansa cervicalis Action: depresses and retracts hyoid and larynx -intermediate tendon is attached to clavicle -central tendon is related to the carotid sheath |
