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