ARTICULATIONS. LIGAMENTS. 443 



extends from the tubercle on the outer femoral condyle to the head of tin- fibula. 

 Keneath this ligament is the popliteus tendon in its synovial sheath. The 

 posterior portion is inserted into the styloid. It binds the popliteus to the 

 (inter tuberosity. 



Describe lite anterior or ccipsitlar ligament proper. 



It is thin, and attached to the synovial membrane. It is attached to the 

 femur, patella, popliteus muscle, and internal lateral ligament. 



Locate and give function of tlie semiltinar fibre-cartilages, and mention other 

 members of the SCttue physiological cliiss of ligaments. 



They are two circumferential cartilages resting on the articular facets of the 

 tibia. In mechanics they correspond to a ball-bearing. They deepen the cavity 

 which they surround. The cotyloid of the hip, the glenoids of the shoulder 



Posterior crucial 



Ligamentum mucosum 



Alar ligament - _ 



- Alar ligament 



Synovial pouch under tendon 

 of quadriceps extensor 



FIG. 313. ANTKKIOR VIEW OK THK KNEE-JOINT, SHOWING THE SYNOVIAI. I.K;AMKN-IS. 

 (Anterior portion of capsule with the extensor tendon thrown downward.) 



and of the interphalangeal and metacarpo-phalangeal articulations belong to the 

 same class. 



Name tlie attachments of the semilunars. (Fig. 312.) 



They are attached loosely to the borders of the tuberosities by the coronary 

 ligament ; to each other, in front, by the transverse ligament ; their extremities are 

 attached to the depressions in front and behind the spine of the tibia. (Fig. 3 1 2.) 

 \Vliat can you say of the svnorial membrane of tlie knee-joint / 

 It is the largest in the body. One part forms a sac beneath the patella ; 

 another extends some distance above the attachment of the capsule above the 

 joint ; it covers all the surface of the crucial ligaments except at two parts. 

 (ihc the origin and insertion of the crucial ligaments. (Fig. 3 1 2.) 

 The anterior crucial is attached to the tibia in front of the spine, and to the 



