License Image anterior view The bones of the arm are the humerus, ulna and radius. The clavicle and the scapula form the shoulder girdle.
Arm & Hand
Arm Bones
License Image posterior view The bones of the arm are the humerus, ulna and radius. The clavicle and the scapula form the shoulder girdle.
Forearm Bones
License Image posterior view The bones of the arm are the humerus, ulna and radius. The olecranon fossa receives the olecranon process when the forearm is extended. The ulnar collateral ligament of the wrist attaches to the styloid process of the ulna. The radial collateral ligament of the wrist attaches to the styloid process of […]
Forearm Bones
License Image anterior view The bones of the arm are the humerus, ulna and radius. The distal end of the humerus consists of a cartilage covered condyle divided into two parts. The rounded capitulum articulates with the head of the radius. The trochlea articulates with the trochlear notch of the ulna. The coronoid fossa receives […]
Humerus
License Image The humerus is the largest bone in the arm. The head of the humerus, covered with cartilage, articulates with the glenoid cavity of the scapula to form the shoulder joint. The anatomical neck marks the point of attachment of the joint capsule. The surgical neck is frequently the site of fracture. The supraspinatus, […]
Radioulnar Joint
License Image The proximal radioulnar joint is the joint formed by the head of the radius, the annular ligament and the ulna. The band-like annular ligament circles the head of the radius where it fits snugly into the radial notch of the ulna. This joint allows a rotary movement of the head of the radius. The action […]
Elbow Joint
License Image lateral view The elbow joint is a hinge joint composed of three bones: the humerus, the radius and the ulna. In this image the capitulum of the humerus articulates with the slightly cupped surface on the head of the radius to form the radiohumeral joint. This is the lateral view of the elbow […]
Elbow Joint
License Image medial view The elbow joint is a hinge joint composed of three bones: the humerus, the radius and the ulna. The Humeroulnar joint is the junction of the trochlea of the humerus and the trochlear notch of the ulna. This is the medial view of the elbow joint.
Biceps Brachii Muscle
License Image Anterior view of the arm showing the biceps brachii muscle .
Brachialis Muscle
License Image Anterior view of the brachialis and coracobrachialis muscles of the arm.
Forearm Muscles – Flexors
License Image superficial flexors The muscles of the forearm can be divided into two groups: anterior (flexors) and posterior (extensors). Both the flexors and extensors are further divided into superficial and deep layers. The forearm muscles that control the movement of the hands are known as extrinsic hand muscles. These muscles originate outside the hand […]
Forearm Muscles – Flexors
License Image deep flexors The deep flexors of the forearm are the flexor pollicis longis, flexor digitorum profundus and the pronator quadratus. The digitorum profundus flexes the four fingers and the pollicis longis flexes the thumb. (Closing your hand into a fist flexes the fingers and thumb). The pronator quadratus pronates the forearm and hand.
Forearm Muscles – Extensors
License Image superficial extensor The superficial extensors of the forearm are the brachioradialis, extensor carpi radialis longus, anconeus, extensor carpi radialis brevis, extensor carpi ulnaris, extensor digitorum and extensor digiti minimi. The extrinsic hand muscles originate in the forearm and insert on structures within the hand. They control movements of the wrist, hand, fingers and […]
Forearm Muscles – Extensors
License Image deep extensors The deep extensors of the forearm are the supinator, abductor pollicis longus, extensor pollicis longus, extensor pollicis brevis, extensor indicis. The extrinsic hand muscles originate in the forearm and insert on structures within the hand. These muscles control movements of the wrist, hand, fingers and thumb. The supinator rotates, or supinates, […]
Forearm Supination
License Image The supinator muscle rotates, or supinates, the forearm and hand. Other muscles that can perform this function are the biceps and brachioradialis.
Forearm Pronation
License Image The pronator teres and pronator quadratus muscles rotate, or pronate, the forearm and hand. A muscle that can assist in this function is the brachioradialis. Pronation of the forearm occurs at the radioulnar joint.
Hand X Ray
License Image The following bones are visible in this hand x ray: distal phalanges middle phalanges proximal phalanges metacarpal bones carpal bones radius ulna sesamoid bone The carpal bones are: trapezium trapezoid capitate hamate scaphoid lunate triquetral pisiform
Hand Bones
License Image anterior (palm) The bones of the hand consist of 14 phalanges, 5 metacarpals, and 8 carpals. The carpal bones are the: 1. trapezium 2. trapezoid 3. capitate 4. hamate 5. pisiform 6. triquetrum 7. lunate 8. scaphoid
