Trunk and upper extremities muscle groups
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show | O-one head from the coracoid process; the other from the supraglenoid tubercle, I-tuberosity of radius, A-flexion at elbow and shoulder; supination
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Deltoid | show 🗑
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show | O-xiphoid process, cartilages of ribs 4-10, and anterior surfaces of lumbar vertebrae, I-central tendinous sheet, A-contraction expands thoracic cavity, compresses abdominopelvic cavity
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show | O-inferior border of each rib, I-superior boarder of more inferior rib, A-elvate ribs
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External Oblique | show 🗑
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show | O-lumbodorsal fascia and iliac crest, I-inferior ribs, xiphoid process, and linea alba, A-compresses abdomen, depresses ribs, flexes or bends spine
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Pectoralis Major | show 🗑
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show | O-anterior-superior surfaces of ribs 2-4, 2-5, or 3-5, depending on anatomical variation, I-coracoid process of scapula, A-depresses and protracts shoulder; rotates scapula so glenoid cavity moves inferorly; elevates ribs if scapula is stationary
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show | O-superior surface of pubis around symphysis, I-inferior surfaces of costal cartilages (ribs 5-7) and xiphoid process, A- depresses ribs, flexes vertebral column, compresses abdomen
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Rhomboid Minor | show 🗑
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Serratus Anterior | show 🗑
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Transverse Abdominis | show 🗑
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Levator Scapulae | show 🗑
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show | origin-occipital bone and spinous processes of thoracic vertebrae, insertion-clavicle and scapula, action-elevate, retract, depress, or rotate scapula upward, elevate clavicle, or extend neck
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show | Origin-clavicle and scapula, Insertion: humerus, action-abduction at shoulder
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Rhomboideus Major | show 🗑
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show | origin-supraspinous fossa of scapula, insertion: greater tubercle of humerus, action-abduction at shoulder
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Infraspinatus | show 🗑
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show | origin-lateral border of scapula, insertion-greater tubercle of humerus, action-lateral rotation at shoulder
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Teres Major | show 🗑
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Triceps Brachii | show 🗑
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show | origin-spinous processes of inferior thoracic and all lumbar vertebrae, ribs 8-12, and lumbodorsal fascia, insertion-intertubercular groove of the humerus, action-extension, adduction, and medial rotation at shoulder
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Extensor carpi radialis longus | show 🗑
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show | origin-lateral epicondyle of humerus, insertion: digits 2-5, action-extends digits 2-5
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show | Origin-medial epicondyle of humerus, Insertion-Bases of second and third metacarpal bones, Actions-Flexion and abduction at wrist
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Palmaris longus | show 🗑
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show | Origin-Medial epicondyle of the humerus, Insertion-5th metacarpal, Action-Flexion and adduction at wrist
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subscapularis | show 🗑
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show | Origin-Iliolumbar ligament and iliac crest, Insertion-Inferior border of twelfth rib and transverse processes of L1-L4, Action-together they depress ribs, alone each side laterally flexes vertebral column
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Splenius capitis | show 🗑
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Iliocostalis lumborum | show 🗑
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show | Origin-transverse and costal processes of cervical vertebrae, Insertion-superior surfaces of first two ribs, Action-elevate ribs or flex neck
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show | abducts little finger
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show | flexes little finger
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show | adducts thumb
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dorsal interossei | show 🗑
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flexor pollicis brevis | show 🗑
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lumbricals | show 🗑
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show | opposition of thumb
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show | adduct fingers
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Palmaris brevis | show 🗑
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bipennate muscle fascicles | show 🗑
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sphicnter | show 🗑
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convergent muscle fascicles | show 🗑
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show | bundle of muscle fibers
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multipennate muscle fascicles | show 🗑
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parallel fascicles | show 🗑
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show | spindle-shaped muscles with parallel fibers
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show | fascicles are arranged on only one side of tendon.
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show | attaches muscle to bone
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ligament | show 🗑
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show | a type of muscle fiber arrangement in which each fiber attaches obliquely to a central tendon
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