Forearm & Wrist Anatomy
Wrist Skeletal Anatomy 8 carpal bones (Short) Scaphoid Lunate Trapezoid Pisiform Triquetrium Trapezium Capitate Hamate
Forearm Skeletal Anatomy Radius Ulna
Large Amounts of Movement Roughly 19 joints are found in the wrist & forearm Range of Motion Wrist Flexion = 80° Wrist Extension = 70° Wrist Ulnar Deviation = 30° Wrist Radial Deviation = 20° Pronation = 90° Supination = 90°
Muscles Wrist Flexors Flexor Carpi Radialis Flexor Carpi Ulnaris Origin: Medial Epicondyle of Humerus Insertion: 1st & 2nd Metacarpals Flexor Carpi Ulnaris Origin: Medial Epicondyle of Humerus & Olecranon Process of Ulna Insertion: Pisiform, Hamate, 5th metacarpal
Muscles Wrist Extensors Extensor Carpi Radialis Longus Origin: Just above Lateral Epicondyle of humerus Insertion: 2nd metacarpal Extensor Carpi Radialis Brevis Origin: Lateral Epicondyle of Humerus Insertion: 3rd metacarpal Extensor Carpi Ulnaris Insertion: 5th Metacarpal
Muscles of the Forearm Pronator Teres Pronator Quadratus Supinator Origin: Medial Epicondyle & Coronoid Process of the Ulna Insertion: Mid 1/3 of the radius Pronator Quadratus Origin: Distal 1/3 of anterior ulna Insertion: Distal 1/3 of anterior radius Supinator Origin: Lateral side of the elbow (bone & ligaments) Insertion: Upper 1/3 of radius
Nerve Supply to the Wrist & Forearm Radial Nerve, Ulnar Nerve, Median Nerve