Term
Platysma
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Definition
Platysma
O: superficial fascia of upper chest
I: superficial fascia of chin and jaw muscles
Action: draw skin up and depress lower lip
Nerve: CN VII (facial) |
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Term
Sternocleidomastoid
O:
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Definition
Sternocleidomastoid
O:
sternal: manubrium of sternum
clavicular: clavicle
I: mastoid process
Action: bilateral -- flex neck and cervicle vertebra
unilateral -- flex neck laterally & rotate head contralaterally
Nerve: CN XI (accessory), C2-C3 |
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Term
Digastric Anterior
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Definition
Digastric Anterior
O: Inferior border of mandible
I: Tendon of hyoid
Action: Opens jaw, elevates/steadies hyoid during swallowing and speaking
Nerve: CN V (trigeminal) |
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Term
Digastric Posterior
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Definition
Digastric Posterior
O: Mastoid notch of temporal bone
I: Tendon of hyoid
Action: Pulls hyoid posteriorly, elevates/steadies hyoid during swallowing and speaking
Nerve: CN VII (facial) |
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Term
Stylohyoid
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Definition
Stylohyoid
Action: Draws hyoid posteriorly, assists in elevating tongue
Nerve: CN VII (facial) |
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Term
Mylohyoi[image]d
Action:
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Definition
Mylohyoid
Action: Raise floor of mouth and tongue
Nerve: CN V3 (trigeminal) |
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Term
Geniohyoid
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Definition
Geniohyoid
Action: Protrude tongue and hyoid
Nerve: C1 via CN XI (hypoglossal) |
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Term
Sternohyoid
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Action:
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Definition
Sternohyoid
Action: Depress hyoid during swallowing
Nerve: C1-C3 |
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Term
[image]Omohyoid
Action:
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Definition
Omohyoid
Action: Depress, retract, and steady hyoid
Nerve: C1-C3 |
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Term
Sternothyroid
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Definition
Sternothyroid
Action: Depress hyoid and larynx
Nerve: C1-C3 |
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Term
Thyrohyoid
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Action:
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Definition
Thyrohyoid
Action: Depress hyoid and elevate larynx
Nerve: C1 via CN XI (hypoglossal) |
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Term
Longus Capitis
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Definition
Longus Capitis
O: Occipital bone
I: Transverse processes of C3-C6 vertebrae
Action: Flex head
Nerve: C1-C3 |
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Term
Longus Colli
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Action:
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Definition
Longus Colli
Action: Flex neck with rotation to opposite side
Nerve: C2-C6 |
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Term
Rectus Capitis Anterior
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Definition
Rectus Capitis Anterior
O: Anterior atlas
I: Occipital bone
Action: Flex head and lateral flexion of vertebra
Nerve: C1-C2 |
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Term
Rectus Capitis Lateralis
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Definition
Rectus Capitis Lateralis
O: Transverse process of atlas
I: Occipital bone
Action: Flex head and help stabilize
Nerve: C1-C2 |
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Term
Anterior Scalene
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Definition
Anterior Scalene
O: Transverse processes of C3-C6
I: 1st rib
Action: Flexes head and elevates 1st rib
Nerve: C4-C6 |
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Term
Middle Scalene
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Definition
Middle Scalene
O: Transverse processes of C5-C7
I: 1st rib
Action: Flexes neck laterally and elevates 1st rib
Nerve: C4-C8 |
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Term
Posterior Scalene
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Definition
Posterior Scalene
O: Transverse processes of C5-C7
I: 2nd rib
Action: Flexes neck laterally and elevates 2nd rib
Nerve: C7-C8 |
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