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Neck, Pecs, and Abs
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Sternocleidomastoid O: sternum, clavicle I: Mastoid Process
A: Pulls head side to side, raises sternum
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Splenius Capitis O: Cervical and thoracic vertebrae I: Mastoid process
A: Rotates head, head side to side, or just straighten head
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Semispinalis Capitis O: Cervical and thoracic Vertebrae
I: Occipital Bone A: Extends head
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Pectoralis Girdle
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Trapezius O: Occipital bone, cervical and thoracic vertebrae
I: Clavicle, scapula A: Rotates scapula, raises arms, scapulamedial, down
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Rhomboideus Major O: Thoracic Vert. I: Scapula
A: Raises and adducts scapula
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Levator Scapulae O: Cervical Vert. I: Scapula A: Elevates scapula
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Serratus Anterior O: Outer surface of ribs
I: VENTRAL surface of the scapula A: Pulls Scapula anterior and downward
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Pectoralis Minor O: Sternal end of ribs
I: Coracoid process of the scapula A: Pulls scapula anteriorly, raises ribs
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Abdominal Wall
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External Oblique O: Lower ribs I: Ilium and linea alba
A: Tenses abdominal wall, rotates torso
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Internal Oblique O: Crest of ilium, I: ribs, linea alba, pubis
A: Tenses abdominal wall O: Crest of ilium, I: ribs, linea alba, pubis A: Tenses abdominal wall
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Transverse Abdominus O: Lower ribs, lumbar vert. ilium
I: Linea alba, pubis A: Tenses abdominal wall
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Rectus Abdominis O: Pubis I: Xiphoid, costal cartilage
A: Tenses abdominal wall, flexes spine.
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