The Elbow and Radioulnar Joints - PowerPoint PPT Presentation

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The Elbow and Radioulnar Joints

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  1. The Elbow and Radioulnar Joints Anatomy and Kinesiology 420:024

  2. The Elbow and Radioulnar Joints • Usually grouped together due to close anatomical relationship • Elbow joint movements may be clearly distinguished from those of the radioulnar joints • Often grouped together due to proximity • Entirely different • Structurally = 2, functionally = 1 • Elbow joint distal attachment: • Ulna • Radioulnar joint distal attachment: • Radius

  3. Objectives • Bones, bony landmarks and joints • Muscles • Movements

  4. The Elbow and Radioulnar Joints • Elbow Joint • Diarthrodial uniaxial hinge joint • Plane? • Axis? • Movements? • Articulation? • Bony Stops?

  5. From Seeley RR, Stephens TD, Tate P: Anatomy & physiology, ed 7, New York, 2006, McGraw-Hill; Shier D, Butler J, Lewis R: hole’s human anatomy & physiology, ed 9, New York, 2002, McGraw-Hill. Radioulnar Joint • Radioulnar Joint • Diarthrodial uniaxial pivot joint • Plane? • Axis? • Movements? • Articulations?

  6. Objectives • Bones, bony landmarks and joint • Muscles • Movements

  7. Biceps Brachii

  8. Brachialis

  9. Brachioradialis

  10. Triceps Brachii

  11. Anconeus

  12. Pronator Teres

  13. Pronator Quadratus

  14. Supinator

  15. Objectives • Bones, bony landmarks and joint • Muscles • Movements

  16. Movements • Flexion: • Movement of forearm to shoulder by bending the elbow to decrease its angle Extension • Extension: • Movement of forearm away from shoulder by straightening the elbow to increase its angle

  17. Movements • Pronation • Internal rotary movement of radius on ulna that results in hand moving from palm-up to palm-down position • Supination • External rotary movement of radius on ulna that results in hand moving from palm-down to palm-up position

  18. FLEXION • Superior movement of the forearm in the sagittal plane

  19. FLEXION

  20. FLEXION • Biceps brachii • Brachialis • Brachioradialis • Pronator teres

  21. EXTENSION • Inferior movement of the foremarm in the sagittal plane

  22. EXTENSION

  23. EXTENSION • Triceps • Long head also extends the shoulder • Anconeus

  24. PRONATION • Internal rotary movement of the palm to the down position

  25. Pronator Quadratus

  26. PRONATION Supinated position

  27. PRONATION • Brachioradialis • Pronator teres • Pronator quadratus

  28. SUPINATION • External rotary movement of the palm to the up position

  29. Supinator

  30. SUPINATION Supinated position

  31. SUPINATION Pronated position

  32. SUPINATION • Biceps brachii • Brachioradialis • Supinator