Forearm Wrist Anatomy Wrist Skeletal Anatomy 8 carpal

Forearm & Wrist Anatomy

Wrist Skeletal Anatomy 8 carpal bones (Short) Scaphoid Lunate Trapezoid Pisiform Triquetrium Trapezium Capitate Hamate

Forearm Skeletal Anatomy ü Radius ü Ulna

Large Amounts of Movement ü Roughly 19 joints are found in the wrist & forearm ü Range of Motion ü Wrist Flexion = 80° ü Wrist Extension = 70° ü Wrist Ulnar Deviation = 30° ü Wrist Radial Deviation = 20° ü Pronation = 90° ü Supination = 90°

Muscles Wrist Flexors ü Flexor Carpi Radialis üOrigin: Medial Epicondyle of Humerus üInsertion: 1 st & 2 nd Metacarpals ü Flexor Carpi Ulnaris üOrigin: Medial Epicondyle of Humerus & Olecranon Process of Ulna üInsertion: Pisiform, Hamate, 5 th metacarpal

Muscles Wrist Extensors ü Extensor Carpi Radialis Longus üOrigin: Just above Lateral Epicondyle of humerus üInsertion: 2 nd metacarpal ü Extensor Carpi Radialis Brevis üOrigin: Lateral Epicondyle of Humerus üInsertion: 3 rd metacarpal ü Extensor Carpi Ulnaris üOrigin: Lateral Epicondyle of Humerus üInsertion: 5 th Metacarpal

Muscles of the Forearm ü Pronator Teres ü Origin: Medial Epicondyle & Coronoid Process of the Ulna ü Insertion: Mid 1/3 of the radius ü Pronator Quadratus ü Origin: Distal 1/3 of anterior ulna ü Insertion: Distal 1/3 of anterior radius ü Supinator ü Origin: Lateral side of the elbow (bone & ligaments) ü Insertion: Upper 1/3 of radius

Nerve Supply to the Wrist & Forearm ü Radial Nerve, Ulnar Nerve, Median Nerve