166 



THE ARTICULATIONS IN GENERAL 



Second metacarpal bone- 

 Os rnetacarpale II. 



Point of intersection of the axes x 

 of adduction and abduction 



Axis of flexion of the metacarpo- , 



phalangeal articulation 



Lateral ligament. - 

 Lig. collaterale 



"" i 



Proximal articular surface of'-' \i "< 

 the first phalanx 



Axis of flexion of the proximal . 

 interphalangeal articulation 



Lateral ligament^ 

 Lig. collaterale 



Second phalanx . 

 Phalanx II. 



Axis of flexion of the distal inter-, 

 phalangeal articulation 



Third phalanx. 

 Phalanx III. 



Centre of the head of the metacarpal bone 

 (axis of flexion of the metacarpo-phalangeal 

 articulation) 



..Capsule of the joint 



Capsula articularis 



^.Lateral ligament- 

 Lig. collaterale 



Capsule of the joint 



Capsula articularis 



Third phalanx 

 Phalanx III. 



Distal interphalangeal 

 articulation 



Articulatio digit! distalis 



V, 



Axes of flexion of the inter- 

 phalangeal articulations 



FIG. 384. EXTENSION. POSTERIOR 

 ASPECT. 



FIG. 385. FLEXION. LATERAL 

 ASPECT. 



DIARTHROSIS (METACARPO-PHALANGEAL ARTICULATION). GINGLYMUS, OR HINGE JOINT 



(ARTICULATIONS OF TH-E FINGERS). 



External malleolar surface 

 Facies malleolaris lateralis 



Superior articular surface of the astragalus 

 Facies superior trochleae tali 



Internal malleolar surface 

 / Facies malleolaris medialis 



Line completing the edge of- 

 the screw 



Axis of the superior articular 



surface of the astragalus (axis 



of the screw = axis of rotation 



of the ankle-joint) 



FIG. 386. ARTICULATIO COCHLEARIS, COCHLEOID OR SCRE GINGLYMUS. (SUPERIOR ARTICULAR 

 SURFACE OF THE LEFT ASTRAGALUS, SEEN FROM BEHIND, SHOWING THE SCREW FORM OF THE 

 ANKLE-JOINT. 



Diarthrosis, or Discontinuous Articulation Articulatio simplex, simple joint. 



