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Shs.101 lec 06
- 1. SHS.101 ANATOMY I Momna Ghaffar REFERENCE TEXT: RICHARD S. SNELL SEMESTER: I (SPRING 2019)
- 2. REVIEW OF LAST LECTURE • Introduction to upper limb • Clavicle • Scapula • Humerus
- 3. INTRODUCTION • Bones of forearm • Radius • Ulna • Hand • Carpels • Metacarpels • Phalanges
- 4. BONES OF THE FOREARM There are two bones in forearm • Radius • Ulna
- 6. RADIUS • The radius is the lateral bone of the forearm • At the proximal end of the radius is the small circular head
- 8. RADIUS • The upper surface of the head is concave • It articulates with convex capitulum of humerus • Circumference of head articulates with radial notch of ulna
- 9. • Below the head, the bone is constricted to form the neck • Below the neck is the bicipital tuberosity for the insertion of the biceps muscle RADIUS
- 11. • The shaft of the radius is wider below than above. • It has a sharp interosseous border medially for the attachment of the interosseous membrane • It binds the radius and ulna together RADIUS
- 13. • The pronator tubercle, lies halfway down on its lateral side • At the distal end of the radius is the styloid process • This projects distally from its lateral margin RADIUS
- 15. • The inferior articular surface articulates with • The scaphoid • Lunate bones • They all make wrist joint RADIUS
- 16. • On the medial surface is the ulnar notch • It articulates with the round head of the ulna RADIUS
- 17. • On the posterior aspect of the distal end is a small tubercle, the Dorsal tubercle • It is grooved on its medial side by the tendon of the extensor pollicis longus RADIUS
- 20. ULNA • The ulna is the medial bone of the forearm • The proximal end of the ulna is large • It is known as the olecranon process • This forms the prominence of the elbow
- 22. • It has a notch on its anterior surface, the trochlear notch • It articulates with the trochlea of the humerus ULNA
- 23. • Below the trochlear notch is the triangular coronoid process • On lateral surface of coronoid process is the radial notch ULNA
- 24. • Radial notch articulate with the head of the radius • The shaft of the ulna tapers from above down ULNA
- 26. • It has a sharp interosseous border laterally for the attachment of the interosseous membrane • The posterior border is rounded and subcutaneous • It can be easily palpated throughout its length ULNA
- 29. • Below the radial notch is the supinator crest that gives origin to the supinator muscle • At the distal end of the ulna is the small rounded head • It has projecting from its medial aspect the styloid process ULNA
- 33. CARPELS • Total 8 carpels in one hand • They are arranged in 2 rows • First row is proximal • 2nd row is distal
- 35. NAME OF CARPELS BONE • PROXIMAL ROW • Scaphoid • Lunate • Triquetrum • Pisiform
- 37. DISTAL ROW • Trapezium • Trapezoid • Capitate • Hamate
- 39. HOW TO REMEMBER
- 41. METACARPELS • Total 5 in number • Are numbered from thumb side • And move medially
- 44. PHALANGES • Total 14 in number • In thumb there are 2 phalanges • In each finger – 3 phalanges
- 48. SUMMARY 1. Radius 2. Ulna 3. Hand