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The Elbow and Radioulnar Joints

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

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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

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