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Sternocleidomastoid
- Origin: Sternum Clavicle
- Insertion: Mastoid process of temporal bone
- Action: Rotates head and pulls it to the side.
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External Oblique
Action: compresses abdominal viscera. Bends vertebral column latterally. Flexes vertebral column.
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Internal Oblique
Action: Compresses abdominal viscera. Bends vertebral column laterally. Flexes vertebral column.
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Muscle? Origin, Insertion, Action
Rectus abdominus
Origin: pubic crest, symphysis pubis.
Insertion:cartilages of ribs 5-7, xiphoid process
Action: Flexes vertebral column
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Muscle? Origin, Insertion and action?
Transverse Abdominis
Origin: Inguial ligament, Iliac crest, Thoracolumbar fascia, lower 6 ribs.
Insertion: Linea alba
Action: constricts abdominal viscera
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Diaphragm
Action: respiration
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Muscle? Origin Insertion and Action
Trapezius
Origin: Occipital bone, ligamentum nuchae, spines of c-7 and all thoracic vertebrae
Insertion: clavicle, scapular spine, acromion
Action: draws head back. elevates, depresses, rotates, adducts and stabalizes scapula
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