Elbow-Joint. 



Condyl.int 



later, int. 



Condyl.exk 



later, ext. 



121. The Articular Surfaces of the Humerus consti- 

 tuting 1 the Elbow-Joint, seen from above. 



The troclilea serves for articulation with the greater sigmoid cavity 

 of the ulna ; the radial head, Emincntia capitata, for articulation with the 

 cup-shaped depression on the head of the radius. 



122, The Articular Surfaces of the Radius and Ulna 



Constituting" the Elbow-Joint, seen from above. 



O / 



The greater sigrnoid cavity, Cavitas sigmoidea major ulnae, receives 

 the trochlea of the humerus ; the ridge dividing this cavity into two halves 

 corresponds to the furrow on the trochlea. The cup-shaped depression 

 on the head of the radius, Cavitas nlenoidalis capituU radii, glides along 

 the Emincntia capitata of the humerus, in flexion and extension, as well 

 as in pronation and supination. 



Heitzinann, Atlas. I. 13 



