Muscles of the Neck
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Sternocleidomastoid: Origin | Sternum & Clavicle
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| Sternocleidomastoid: Insertion | Mastoid process
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| Sternocleidomastoid: Action | extension, flexion, stabilization of spine
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| Platysma: Origin | Fascia of upper one fourth of chest
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| Platysma: Insertion | Mandible
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| Platysma: Action | Depresses and draws lower lip laterally, draws up skin of chest, depresses mandible
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| Longus Colli: Origin- Superior | Third, fourth, and fifth cervical vertebrae
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| Longus Colli: Insertion- Superior | Altas
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| Longus Colli: Origin- Inferior | First two or three thoracic vertebrae
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| Longus Colli: Insertion- Inferior | Fifth and sixth cervical vertebrae
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| Longus Colli: Origin- Vertical | Upper three thoracic and lower three cervical vertebrae
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| Longus Colli: Insertion- Vertical | Second, third, and fourth cervical vertebrae
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| Longus Colli: Action | All three parts flex cervical vertebrae
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| Longus Capitis: Origin | Third through sixth cervical vertebrae
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| Longus Capitis: Insertion | Occipital bone
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| Longus Capitis: Action | Acting together- flexes head. Acting on one side- Rotates head.
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| Rectus Capitis Anterior: Origin | Atlas
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| Longus Capitis Anterior: Insertion | Occipital bone
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| Longus Capitis Anterior: Action | Flexes head
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| Rectus Capitis Lateralis: Origin | Atlas
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| Rectus Capitis Lateralis: Insertion | Occipital bone
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| Rectus Capitis Lateralis: Action | Bends head laterally
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| Scalenus Anterior: Origin | Third through sixth cervical vertebrae
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| Scalenus Anterior: Insertion | First rib
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| Scalenus Anterior: Action | Raises first rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck
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| Scalenus Medius: Origin | Lower six cervical vertebrae
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| Scalenus Medius: Insertion | First rib
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| Scalenus Medius: Action | Raises first rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck
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| Scalenus Posterior: Origin | Lower two or three cervical vertebrae
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| Scalenus Posterior: Insertion | Second rib
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| Scalenus Posterior: Action | Raises second rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck
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| Rectus Capitis Posterior Major: Origin | Axis
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| Rectus Capitis Posterior Major: Insertion | Occipital bone
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| Rectus Capitis Posterior Major: Action | Extends and rotates head
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| Rectus Capitis Posterior Minor: Origin | Atlas
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| Rectus Capitis Posterior Minor: Insertion | Occipital bone
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| Rectus Capitis Posterior Minor: Action | Extends head
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| Obliquus Capitis Inferior: Origin | Axis
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| Obliquus Capitis Inferior: Insertion | Atlas
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| Obliquus Capitis Inferior: Action | Rotates atlas
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| Obliquus Capitis Superior: Origin | Atlas
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| Obliquus Capitis Superior: Insertion | Occipital bone
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| Obliquus Capitis Superior: Action | Extends and bends head laterally
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Created by:
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