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19 Cards in this Set
- Front
- Back
Longus colli
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Origin: lower anterior vertebral bodies and transverse processes
Insertion: anterior vertebral bodies and transverse processes several segments above Action: flexes the head and neck |
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Longus capitis
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Origin: upper anterior vertebral bodies and transverse processes
Insertion: anterior vertebral bodies and transverse processes several segments above Action: flexes the head and neck |
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Rectus capitis anterior
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Origin: anterior base of the transverse process of the atlas
Insertion: occipital bone anterior to foramen magnum Action: flexes the head |
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Rectus capitis lateralis
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Origin: transverse process of the atlas
Insertion: jugular process of the occipital bone Action: bends the head laterally |
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Anterior scalene
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Attachment A: anterior tubercles of transverse processes of C3-C6
Attachment B: 1st rib Action: if transverse process fixed: elevates the ribs for respiration if ribs fixed: rotates to side opposite of contraction laterally flexes to the contracted side bilaterally flexes the neck |
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Middle scalene
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Attachment A: transverse processes of all cervical vertebrae
Attachment B: 1st rib (behind anterior scalene) Action: if transverse process fixed: elevates the ribs for respiration if ribs fixed: rotates to side opposite of contraction laterally flexes to the contracted side bilaterally flexes the neck |
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Posterior scalene
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Attachment A: posterior tubercles of transverse processes of C5 & C6
Attachment B: 2nd and/or 3rd rib Action: if transverse process fixed: elevates the ribs for respiration if ribs fixed: rotates to side opposite of contraction laterally flexes to the contracted side bilaterally flexes the neck |
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Sternocleidomastoid
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Origin: (two heads)
manubrium of sternum medial portion of clavicle Insertion: mastoid process of temporal bone Action: rotates to side opposite of contraction laterally flexes to the contracted side bilaterally flexes the neck |
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Platysma
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Origin: subcutaneous skin over delto-pectoral region
Insertion: invests in the skin widely over the mandible Action: depress mandible and lower lip tenses the skin over the lower neck |
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Occipitalis (2 bellies)
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Origin:
lateral 2/3 of superior nuchal line external occipital protuberance Insertion: galea aponeurosis, over the occipital bone Action: draws back the scalp to raise the eyebrows and wrinkle the brow |
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Frontalis (2 bellies)
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Origin: galea aponeurosis, anterior to the vertex
Insertion: skin above the nose and eyes Action: draws back the scalp to raise the eyebrows and wrinkle the brow |
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Orbicularis oculi
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Origin:
orbital portion: nasal process of frontal bone palpebral portion: palpebral ligament lacrimal portion: lacrimal crest of lacrimal bone Insertion: circumferentially around orbit meeting in palpebral raphe Action: powerfully closes the eye |
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Orbicularis oris
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Origin:
alveolar border of maxilla lateral to midline of mandible Insertion: circumferentially around mouth blends with other muscles Action: closes the lips protrudes the lips |
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Zygomaticus minor
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Origin: zygomatic bone, posterior to maxillary-zygomatic suture
Insertion: skin of the upper lip Action: elevates the upper lip |
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Zygomaticus major
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Origin: anterior to zygomatic-temporal suture
Insertion: modiolus (angle of the mouth) Action: lifts and draws back the angle(s) of the mouth (as in smiling) |
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Buccinator
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Origin:
posterior alveolar process of maxilla posterior alveolar process of mandible along the pterygomandibular raphe Insertion: modiolus Action: compresses the cheek(s) |
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Masseter
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Origin:
Superficial: zygomatic process of the maxilla inferior border of zygomatic arch Intermediate: inner surface of zygomatic arch Deep: posterior aspect of inferior border of zygomatic arch Insertion: Superficial: angle of mandible lateral surface of mandibular ramus Intermediate: ramus of mandible Deep: superior ramus of mandible coronoid process of mandible Action: closes the lower jaw (clenches the teeth) may deviate mandible to opposite side of contraction |
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Superior oblique
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Origin: body of sphenoid
Insert: upper lateral quadrant of the posterior half of the sclera (via the trochlea, as a pulley) Action: depress medially rotates abducts the eye |
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Inferior oblique
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Origin: orbital surface of maxilla
Insert: lower lateral quadrant of the posterior half of the sclera (via the suspensory ligament, as a pulley) Action: elevates laterally rotates abducts the eye |