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"In aiming sitting, the elbows are supported by the knees." — Moss, 1914

Aim sitting

"In aiming sitting, the elbows are supported by the knees." — Moss, 1914

Section through right elbow joint.

Cross Section of Arm Through Elbow Joint

Section through right elbow joint.

The bicep muscle and the arm bones, to illustrate how, under ordinary circumstances, the elbow joint is flexed when the muscle contracts.

Biceps

The bicep muscle and the arm bones, to illustrate how, under ordinary circumstances, the elbow joint…

"A, acromion; C, coracoid; CA, carpus; CL, clavicle; H, humerus; M, metacarpals; O, ventral surface of the scapula; P, phalanges, proximal row; R, radius; T, head of humerus; U, ulna." —Whitney, 1889

Bones of the Shoulder and Upper Extremity - Front View

"A, acromion; C, coracoid; CA, carpus; CL, clavicle; H, humerus; M, metacarpals; O, ventral surface…

Right elbow joint, cut through at right angles to the axis of trochlea humeri, from the ulnar side.

Elbow Joint

Right elbow joint, cut through at right angles to the axis of trochlea humeri, from the ulnar side.

Anterior view of the elbow joint.

Anterior View of the Elbow Joint

Anterior view of the elbow joint.

Inner aspect of the elbow joint.

Inner Aspect of the Elbow Joint

Inner aspect of the elbow joint.

Vertical section through the trochlear part of the elbow joint.

Vertical Section Through Elbow Joint

Vertical section through the trochlear part of the elbow joint.

Left elbow joint, showing posterior and external ligaments.

Elbow Showing External Ligaments

Left elbow joint, showing posterior and external ligaments.

Left elbow joint, showing anterior and internal ligaments.

Elbow Showing Internal Ligaments

Left elbow joint, showing anterior and internal ligaments.

Frontal section of the elbow, viewed from in front.

Frontal Section Through the Elbow

Frontal section of the elbow, viewed from in front.

Posterior view of elbow, showing relative position of condyles and olecranon. A, in extension; B, in flexion.

Posterior View of Elbow

Posterior view of elbow, showing relative position of condyles and olecranon. A, in extension; B, in…

Sagittal section of the right elbow, with the arm in pronation.

Sagittal Section of the Elbow

Sagittal section of the right elbow, with the arm in pronation.

Transverse section through the bend of the elbow.

Section Through Elbow

Transverse section through the bend of the elbow.

"The superficial veins in front of the elbow-joint. B', tendon of biceps muscle; Bi, brachialis internus muscle; Pt, pronator teres muscle; 1, median nerve; 2, 3, 4, nerve-branches to the skin; B, brachial artery, with its small accompanying veins; cep, cephalic vein; bas, basilic vein; m', median vein; *, junction of a deep-lying vein with the cephalic." —Martin, 1917

Elbow-Joint

"The superficial veins in front of the elbow-joint. B', tendon of biceps muscle; Bi, brachialis internus…

Section through right forearm one inch below the elbow.

Cross Section Through Forearm One Inch below Elbow

Section through right forearm one inch below the elbow.

Section through right forearm, two inches below the elbow.

Cross Section Through Forearm Two Inches below Elbow

Section through right forearm, two inches below the elbow.

"Showing how the Ends of the Bones are shaped to form the Elbow Joint. The cut ends of a few ligaments are seen." — Blaisedell, 1904

Elbow Joint

"Showing how the Ends of the Bones are shaped to form the Elbow Joint. The cut ends of a few ligaments…

The elbow has a simple hinge joint. Tendons attach muscle to bones.

Elbow Joint

The elbow has a simple hinge joint. Tendons attach muscle to bones.

This illustration shows a method of applying a triangular bandage to the chest, shoulder, head and elbow.

Triangular Bandage

This illustration shows a method of applying a triangular bandage to the chest, shoulder, head and elbow.

"The <em>ulna</em>, or elbow bone, is the larger of these two bones. It is joined to the humerus by a hinge joint at the elbow. It is on the same side as the little finger. The <em>radius</em>, queerly named because it is supposed to resemble one of the spokes of a wheel, is the long, slightly curved, outer bone fo the forearm. It is on the same side as the thumb. Its upper end is fastened both to the ulna and the humerus." — Blaisedell, 1904

Ulna and Radius

"The ulna, or elbow bone, is the larger of these two bones. It is joined to the humerus by…