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Do Now!

Do Now!. What are the two flexion muscles of the upper arm?. Arm Muscles. Grouped according to their primary actions: Flexion Coracobrachialis & Pectoralis Major Extension Teres Major & Latissimus dorsi Abduction Suprasinatus & Deltoid Rotation

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Do Now!

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  1. Do Now! What are the two flexion muscles of the upper arm?

  2. Arm Muscles • Grouped according to their primary actions: • Flexion • Coracobrachialis & Pectoralis Major • Extension • Teres Major & Latissimusdorsi • Abduction • Suprasinatus & Deltoid • Rotation • Subscapularis, Infraspinatus & Teres Minor

  3. Flexors • Coracobrachialis: • Location: extends from the scapula to the middle medial humerus • Action: flexes and abducts the arm

  4. Coracobrachialis

  5. Bench Press

  6. Flexors • Pectoralis Major: • Shape: thick, fan shaped muscle • Location: upper chest; fibers extend from the sternum through the armpit to the humerus • Action: pulls the arm forward and across the chest

  7. Pectoralis Major

  8. Dumbbell Press/Push Up

  9. Extensors • Teres Major: • Location: connects the scapula to the humerus • Action: extends the humerus & adducts/ rotates the arm medially

  10. Teres Major

  11. Extensors • Latissimusdorsi: • Shape: wide, triangular muscle • Location: curves upward from the lower back, around the side, and to the armpit • Action: extends & adducts the arm, rotating the humerus medially; also pulls the shoulder downward & back

  12. Latissimusdorsi

  13. Pull Up

  14. Abductors • Supraspinatus: • Location: depression above the posterior scapula spine & connects to the humerus • Action: abducts the arm

  15. Supraspinatus

  16. Dumbbell Lateral Raise

  17. Abductors • Deltoid: • Shape: thick & triangular • Location: covers the shoulder joint; connects the clavicle & scapula to the humerus • Action: abducts the arm

  18. Deltoid

  19. Deltoid Extension

  20. Rotators • Subscapularis: • Shape: large & triangular • Location: covers anterior scapula; connects the scapula to the humerus • Action: rotates the arm

  21. Cable Internal Shoulder Rotation

  22. Rotators • Infraspinatus: • Location: occupies depression below the spin on the posterior surface; attaches the scapula to the humerus • Action: rotates the arm laterally • Teres Minor: • Location: connects the scapula to the humerus • Action: rotates the arm laterally

  23. Side Lying Shoulder Rotations

  24. Side Lying Shoulder Rotations

  25. Muscles of the Arm

  26. Do Now! What is the difference between the supraspinatus and the infraspinatus?

  27. Coracoid Process Sternum Acromion Process Greater Tubercle Deltoid Tuberosity Below Scapula Spine Lateral Scapula Lesser Tubercle Scapula Spine Anterior Scapula Inner Tubercular Groove Clavicle Lumbar Vertebrae Iliac Crest

  28. Muscles that move the Forearm- Flexors • Biceps brachii • Shape: long, rounded mass w/ 2 heads on anterior arm • Location: connects the scapula to the radius • Action: flexes the elbow & rotates the hand laterally • Brachialis • Location: beneath the biceps; connects humerus shaft to the ulna • Action: strongest flexor of the elbow • Brachioradialis • Location: connects the humerus to the radius • Action: flexes the elbow

  29. Curls

  30. Forearm- Flexors

  31. Muscles that move the Forearm- Extensor • Triceps Brachii • Shape: three heads • Location: only muscle on the back of the arm; connects the humerus and scapula to the ulna • Action: extends the elbow

  32. Triceps Dip

  33. Bell Work What muscle extends the arm at the elbow? What three muscles extend the arm?

  34. Muscles that move the Forearm- Rotators • Supinator • Shape: short muscle • Location: ulna & lateral end of humerus to radius • Action: rotates hand so palm is up (supination) • PronatorTeres • Shape: short muscle • Location: connects the ends of the humerus & ulna to the radius • Action: rotates hand so palm is down (pronation) • PronatorQuadratus • Location: distal end of ulna to the distal end of the radius • Action: rotates the arm medially

  35. Medial Epicondyle Deltoid Tuberosity Coracoid Process Radius Humerus Ulna Medial Humerus Coranoid Process Deltoid Tuberosity Lateral Epicondyle Radial Tuberosity Styloid Process Olecranon Process Lateral Humerus Glenoid Cavity

  36. Do Now! • What three muscles are used to flex the arm? • What is the muscle name that extends the arm? • What muscles turn the palm face up and face down?

  37. Do Now! • Where do the biceps originate? • Where do the triceps originate?

  38. Muscles that move the Hand • Flexors (anterior) • Flexor carpiradialis- flexes wrist & abducts hand • O- medial epicondyle of humerus • I- 2nd/3rd metacarpals • Flexor carpiulnaris- flexes wrist & abducts hand • O- medial epicondyle of humerus • I- carpal/metacarpal bones

  39. Anterior Arm

  40. Muscles that move the Hand • Flexors • Palmaris longus- flexes wrist • O- medial epicondyle of humerus / I- fascia of palm • Flexor digitorumprofundus- flexes distal joints of fingers • O- anterior ulna / I- distal phalanges • Flexor digitorumsuperficialis- flexes fingers & wrist • O- medial epicondyle of humerus / I- tendons of fingers Flexor digitorum profundus Flexor digitorum superficialis Palmaris longus

  41. Anterior Arm

  42. Muscles that move the Hand • Extensors (posterior) • Extensor carpiradialislongus- extends wrist/abducts hand • O- distal humerus / I- 2nd metacarpal • Extensor carpiradialisbrevis- extends wrist/ abducts hand • O- lateral epicondyle of humerus/ I- 2nd/3rd metacarpals

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