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The elbow joint (articulatio cubiti).

Elbow Joint

The elbow joint (articulatio cubiti).

"Fig. 28. - Mechanism of elbow-joint. ..., where rc and uc show respectively the size, shape, and position of the radial condyle and ulnar condyle of the humerus. It is evident that in the flexed state of the elbow, as shown in the middle figure, the radius, rd, is do pushed upon that its end projects beyond ul, the ulna; while in the opposite condition of extension, shown in the lower figure, rd is pulled back to a corresponding extent." Elliot Coues, 1884

Mechanism of the Elbow-Joint

"Fig. 28. - Mechanism of elbow-joint. ..., where rc and uc show respectively the size, shape, and position…

A view from behind of a frontal section through the right elbow joint.

Frontal Section Through Elbow Joint

A view from behind of a frontal section through the right elbow joint.

The ligaments of the elbow joint- posterior view. Labels: a, external lateral ligament; b, internal laterla ligament; c, external arciform ligaments; d, internal arciform ligaments.

Ligaments of the Elbow Joint

The ligaments of the elbow joint- posterior view. Labels: a, external lateral ligament; b, internal…

A sagittal section through the left elbow joint of a child. View from the inner side.

Sagittal Section Through Elbow Joint

A sagittal section through the left elbow joint of a child. View from the inner side.

"Fig. 29., from a young grouse (Centrocercus urophasianus, six months old), is designed to show the composition of the carpus and metacarpus before the elements of these bones fuse together: r, radius; u, ulna; s, scapholunar or radiale; c, cuneiform or ulnare; om, a carpal bone believed to be os magnum, later fusing with the metacarpus; z, a carpal bone, supposed to be unciform, later fusing with metacarpus; 8, an unidentified fifth carpal bone, which may be called pentosteon, later fusing with the metacarpus; 7, radial or outer metacarpal bone, bearing the pollex or outer digit, consisting of two phalanges, d and k; 9', principal (median) metacarpal bone, bearing the middle finger, consisting of the two phalanges, d', d"; 9, inner or ulnar metacarpal, bearing a digit of one phalanx, d'". The pieces marked om, z, 7, 8, 9,. all fuse with 9'. (From nature by Dr. R. W. Shufeldt, U.S.A.)."Elliot Coues, 1884

The Wing Bones of a Young Grouse

"Fig. 29., from a young grouse (Centrocercus urophasianus, six months old), is designed to show the…

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.