52 



ANATOMY. 



Tubercle,* anteriorly on the head, between the tuberosities, for the insertion 



of the ligamentum patellae. 

 Popliteal Notch, posteriorly between the tuberosities, affords attachment to 



the posterior crucial ligament. 



Groove, on the inner tuberosity posteriorly, for the insertion of the tendon of 

 the semi-membranosus muscle. 



Facet, on the outer tuberosity posteriorly and looking 

 downwards, for articulation with the head of the 

 fibula. 



Popliteal Line, obliquely across the upper part of the 

 shaft posteriorly, affords attachment to the fascia of 

 the popliteus, and parts of the soleus, flexor longus 

 digitorum, and tibialis posticus muscles. 

 Nutrient Canal, the largest in the skeleton, opens just 



below the popliteal line, its orifice looking upwards. 

 Shaft,* has 3 sharp ridges, I in front, the Crest or 

 Shin,/ and I on either side, to the external of which 

 is attached the interosseous membrane. 

 Lower Extremity, g is smaller than the upper, grooved 

 posteriorly for the tendon of the flexor longus pol- 

 licis ; externally has a rough triangular depression 

 for articulation with the fibula, and for the attach- 

 ment of the inferior interosseous ligament. Its in- 

 ferior surface is concave and smooth for articulation 

 with the upper surface of the astragalus. 

 Internal Malleolus,h projects downwards from the in- 

 ternal side of the lower extremity. It articulates 

 with the astragalus, is grooved posteriorly for the 

 tendons of the tibialis posticus and flexor longus 

 digitorum muscles, and affords attachment to the in- 

 ternal lateral ligament. 



Describe the Fibula. It is a long slender bone, placed nearly parallel 

 with the tibia on the outer side of the leg. It is also called the peroneous, or 

 peroneal bone. 



Head,J articulates with the external tuberosity of the tibia by a flat facet. 

 Externally it has a prominence for the attachment of the long external 

 lateral ligament of the knee-joint. 



Styloid Process, projects upwards from the head posteriorly, and gives inser- 

 tion to the tendon of the biceps muscle, and the short external lateral 

 ligament of the knee-joint. 

 Shaft i is triangular and twisted on itself, having 3 marked ridges, the 



