Joint Arthrokinematics

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Summary of Joint Arthrokinematics of the Elbow and Forearm Joints. The four specific joints that will be referenced are the Humeroulnar joint, the Humeroradial joint, the Proximal radioulnar joint, and the Distal radioulnar joint.

Motion of ulnar joint surface in Humeroulnar Flexion

Anterior roll, Anterior/distal slide (SAME, SAME)

Motion of ulnar joint surface in Humeroulnar Extension

Posterior roll, Posterior/proximal slide (SAME, SAME)

Motion of the radial joint surface in Humeroradial Flexion

Anterior roll, Anterior slide (SAME, SAME)

Motion of the radial joint surface in Humeroradial Extension

Posterior roll, Posterior slide (SAME, SAME)

Motion if the proximal forearm in Terminal Flexion

Medial roll, Lateral slide (OPPOSITE, OPPOSITE)

Motion if the proximal forearm in Terminal Extension

Lateral roll, Medial slide (OPPOSITE, OPPOSITE)

Motion of rim of radial head in Proximal Radioulnar Pronation (radius on ulna)

Anterior roll, Posterior/dorsal slide (OPPOSITE, OPPOSITE)

Motion of rim of radial head in Proximal Radioulnar Supination

Posterior roll, Anterior/volar slide (OPPOSITE, OPPOSITE)

Motion of distal radial joint surface in Distal Radioulnar Pronation (radius on ulna)

Anterior roll, Anterior slide (SAME,SAME)

Motion of distal radial joint surface in Distal Radioulnar Supination

Posterior roll, Posterior slide (SAME, SAME)

Bony Parts of elbow and forearm complex

Humerus, Ulna, Radius

Humeroulnar Joint characteristics

Hinge joint, flexion/extension movement

Humeroulnar Joint arthrokinematics

CONCAVE ulna fossa ON CONVEX trochlea, medial/lateral slide of ulna

Humeroradial Joint characteristics

Hinge-pivot joint, flexion/extension and supination/pronation

Humeroradial Joint arthrokinematics

CONCAVE radial head ON CONVEX capitulum

Proximal Radioulnar Joint characteristics

Uniaxial pivot joint (meaning proximal and distal radioulnar joints function as one joint), capsule within joint capsule, pronation and supination

Proximal Radioulnar Joint arthrokinematics

CONVEX rim of radial head ON CONCAVE notch of ulna

Distal Radioulnar Joint characteristics

Uniaxial pivot joint (meaning proximal and distal radioulnar joints function as one joint), capsule within joint capsule, pronation and supination

Distal Radioulnar Joint arthrokinematics

CONCAVE notch of distal radius ON CONVEX head of ulna

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