click below
click below
Normal Size Small Size show me how
A&P 2
Muscles of the Neck
Muscle Property | Value |
---|---|
Sternocleidomastoid: Origin | Sternum & Clavicle |
Sternocleidomastoid: Insertion | Mastoid process |
Sternocleidomastoid: Action | extension, flexion, stabilization of spine |
Platysma: Origin | Fascia of upper one fourth of chest |
Platysma: Insertion | Mandible |
Platysma: Action | Depresses and draws lower lip laterally, draws up skin of chest, depresses mandible |
Longus Colli: Origin- Superior | Third, fourth, and fifth cervical vertebrae |
Longus Colli: Insertion- Superior | Altas |
Longus Colli: Origin- Inferior | First two or three thoracic vertebrae |
Longus Colli: Insertion- Inferior | Fifth and sixth cervical vertebrae |
Longus Colli: Origin- Vertical | Upper three thoracic and lower three cervical vertebrae |
Longus Colli: Insertion- Vertical | Second, third, and fourth cervical vertebrae |
Longus Colli: Action | All three parts flex cervical vertebrae |
Longus Capitis: Origin | Third through sixth cervical vertebrae |
Longus Capitis: Insertion | Occipital bone |
Longus Capitis: Action | Acting together- flexes head. Acting on one side- Rotates head. |
Rectus Capitis Anterior: Origin | Atlas |
Longus Capitis Anterior: Insertion | Occipital bone |
Longus Capitis Anterior: Action | Flexes head |
Rectus Capitis Lateralis: Origin | Atlas |
Rectus Capitis Lateralis: Insertion | Occipital bone |
Rectus Capitis Lateralis: Action | Bends head laterally |
Scalenus Anterior: Origin | Third through sixth cervical vertebrae |
Scalenus Anterior: Insertion | First rib |
Scalenus Anterior: Action | Raises first rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck |
Scalenus Medius: Origin | Lower six cervical vertebrae |
Scalenus Medius: Insertion | First rib |
Scalenus Medius: Action | Raises first rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck |
Scalenus Posterior: Origin | Lower two or three cervical vertebrae |
Scalenus Posterior: Insertion | Second rib |
Scalenus Posterior: Action | Raises second rib; acting together, they flex neck; acting on one side, they laterally flex, rotate neck |
Rectus Capitis Posterior Major: Origin | Axis |
Rectus Capitis Posterior Major: Insertion | Occipital bone |
Rectus Capitis Posterior Major: Action | Extends and rotates head |
Rectus Capitis Posterior Minor: Origin | Atlas |
Rectus Capitis Posterior Minor: Insertion | Occipital bone |
Rectus Capitis Posterior Minor: Action | Extends head |
Obliquus Capitis Inferior: Origin | Axis |
Obliquus Capitis Inferior: Insertion | Atlas |
Obliquus Capitis Inferior: Action | Rotates atlas |
Obliquus Capitis Superior: Origin | Atlas |
Obliquus Capitis Superior: Insertion | Occipital bone |
Obliquus Capitis Superior: Action | Extends and bends head laterally |