الفهرس 
1. AnatomyOnly 14 pages are availabe for public view
Abstract
The elbow joint includes two articulations:
(l) The humero-ulnar, between the trochlea of the humerus and the trochlear
notch of the ulna and,
(2) The humero-radia, between the capitulum of the humerus and the facet on
the head of the radius. It is hence a compound synovial joint. Its complexity is
increased further by its continuity with the superior radio - ulnar joint and the
complete articular complex is called the cubital articulation. (1)
a) The articular surfaces: are the trochlea and capitulum of the humerus, on
one side, and the trochlear notch of the ulna and the head of the radius, on the
other. The trochlea is not a part of a simple pully, because its medial flange is
much more extensive than the lateral flange and projects downwards to a lower
level so that the line of the joint, which is roughly 2 cm below the line joining
the two epicondyles passes downwards and medially. In addition, the trochlea
is widest posteriorly and, in this position, its lateral edge is a sharp rim .The
trochlear notch is by no means perfectly congruent with the trochlea. In full
extension the medial part of its upper (olecranon) half is not in contact with the
trochlea, and a corresponding strip on the lateral side loses contact on flexion.