238 THE ARTICULATIONS OF THE HORSE 
The lateral ligament (Lig. collaterale fibulare) is somewhat thicker; it arises from 
the upper depression on the lateral epicondyle, and ends on the head of the fibuia. 
Middle patellar Lateral patellar 
ligament ligament 
Medial patellar 
ligament 
Medial condyle . 
a 
f 
i) 
Lateral 
condyle 
Lateral 
Medial meniscus : 
meniscus 
Fic. 250.—Proximmat Enp or Riextr Trista wits Meniscr, Erc. 
Anterior and posterior cruciate ligaments; 3, posterior ligament of medial meniscus; 4, femoral ligament of 
lateral meniscus; 5, 5’, anterior ligaments of menisci; 6, groove for popliteus tendon; 7, spine of tibia; 8, 9, medial 
and lateral femoro-tibial ligaments. 
It covers the tendon of the origin of the popliteus muscle, a bursa being interposed 
between the two; another bursa is present 
between the lower part of the ligament and 
the margin of the lateral condyle of the tibia. 
The cruciate ligaments are two strong 
rounded bands situated mainly in the inter- 
condyloid fossa of the femur, between the two 
synovial sacs. They cross each other some- 
what in the form of an X, and are named ac- 
cording to their tibial attachments. The 
anterior cruciate ligament (Lig. cruciatum an- 
terius) arises in the central fossa on the tibial 
spine, extends upward and backward, and ends 
on the lateral wall of the intercondyloid fossa. 
The posterior cruciate ligament (Lig. crucia- 
Fic, 251.—Proximan Exp or Ricur Tisza or tum posterius) is medial to the preceding, and 
Horse, wirn Anpas or Licampyrous Ar jg Somewhat larger. It is attached to an emi- 
TACHMENT. nence at the popliteal notch of the tibia, is 
an Oe eet ica Gece Sanat directed upward and forward, and ends in the 
and posterior cruciate ligaments; 6, posterior anterior part of the intercondyloid fossa of 
ligament of medial meniscus. the femur. 
It may be added that these ligaments do not lie in a sagittal plane, but are somewhat twisted 
across each other; outward rotation of the leg untwists and slackens them. 
Movements.—The principal movements of the stifle joimt as a whole are 
