538 



A MANUAL OF ANATOMY 



Muscular Relations.— The muscular relations are as follows : 



Anterior. — The quadriceps extensor cruris. 



External. — ^The biceps femoris. 



Posterior. — The popliteus, plantaris, and outer head of the 

 gastrocnemius externally, and the inner head of the gastrocnemius 

 and semimembranosus internally. 



Internal. — The sartorius, gracilis, semitendinosus, and semi- 

 membranosus. 



Arterial Supply. — The joint receives its arterial supply from the 

 following sources : (i) the long descending branch of the external 

 circumflex of the arteria profunda femoris ; (2) the deep branch ol 



Crureus 



Subcrureus 



Posterior Ligament .- 

 Posterior Crucial Ligament 



Anterior Crucial Ligament- 



Suprapatellar Bursa 



Pouch of Synovial Membrane 

 of Knee-joint 



— Prepatellar Bursa 



— Ligamentum Patellfe 

 — Ligamentum Mucosum 



— Infrapatellar Pad of Fat 



Bursa beneath 

 Ligamentum Patellae 



-Skin 



Fig. 256. — Sagittal Section of the Right Knee-Joint, viewed 

 FROM THE Outer Side. 



the anastomotica magna of the superficial femoral ; (3) the superior 

 and inferior external and internal articular and the central or 

 azygos articular branches of the popliteal ; and (4) the anterior 

 tibial recurrent and posterior tibial recurrent (inconstant) branches 

 of the anterior tibial. 



Nerve-supply. — ^The joint receives its nerves from the following 

 sources : (i) the external and internal popliteal, both from the 

 great sciatic; (2) the anterior femoral; and {3) the obturator. 



Tlie external popliteal nerve furnishes three articular branches, 

 one with the superior external articular artery, one with the inferior 

 external articular, and a recurrent branch with the anterior tibial 

 recurrent. The internal popliteal nerve furnishes three (sometimes 



