In extension. the medial and lateral epicondyles and the top of the olecranon process are in a straight line; in flexion, the bony point form the boundaries of an equilateral triangle
◼ In extension, the medial and lateral epicondyles and the top of the olecranon process are in a straight line; ◼ in flexion, the bony point form the boundaries of an equilateral triangle
Joints between radius and ulna Proximal radioulnar joint桡尺近侧关节 Interosseous membrane of forearm 前臂骨间膜: a fibrous membrane between the shaft of radius and ulna Distal radioulnar joint桡尺远侧关节 formed by head of ulna, ulnar notch of radius and an articular disc
Joints between radius and ulna ◼ Proximal radioulnar joint 桡尺近侧关节 ◼ Interosseous membrane of forearm 前臂骨间膜: a fibrous membrane between the shaft of radius and ulna ◼ Distal radioulnar joint 桡尺远侧关节 formed by head of ulna, ulnar notch of radius and an articular disc
Joints of hand ★ Radiocarpal joint桡腕关节 (ellipsoid) Bones a Carpal articular surface of radius and articular disc below the ulna a Proximal row of carpal: scaphoid lunate and triquetral bones but not pIsIForm Capsule: lax and strengthened by surrounding ligament Movements: flexion, extension adduction abduction and circumduction
Joints of hand ★ Radiocarpal joint 桡腕关节 (ellipsoid) ◼ Bones ❑ Carpal articular surface of radius and articular disc below the ulna ❑ Proximal row of carpal: scaphoid, lunate, and triquetral bones, but not pisiform ◼ Capsule: lax and strengthened by surrounding ligament ◼ Movements: flexion, extension, adduction, abduction, and circumduction
Joints of hand Intercarpal joints腕骨间关节 Carpometacarpal joints腕掌关节 o Carpometacarpal joint of thumb 拇指腕掌关节 Bones: trapezium and base of first metacarpal Movement: flexion extension adduction, abduction, and opposition Intermetacarpal joints掌骨间关节 Metacarpophalangeal joints掌指关节 Interphalangeal joints指间关节
Joints of hand ◼ Intercarpal joints 腕骨间关节 ◼ Carpometacarpal joints 腕掌关节 ❑ Carpometacarpal joint of thumb 拇指腕掌关节 ◼ Bones: trapezium and base of first metacarpal ◼ Movement: flexion, extension, adduction, abduction, and opposition ◼ Intermetacarpal joints 掌骨间关节 ◼ Metacarpophalangeal joints 掌指关节 ◼ Interphalangeal joints 指间关节