402 



MUSCLES AND FASCIJE. 



of the thumb and carpus, producing a well-marked prominence on the back of the wrist, with a 

 deep depression above it. The upper fragment projects forwards, often lacerating the substance 

 of the Pronator Quadratus, and is drawn by this muscle into close contact with the lower end 

 of the ulna, causing a projection on the anterior surface of the forearm, immediately above the 



Fig. 252. Fracture of the Lower End of the Radius. 



carpus, from the flexor tendons being thrust forwards. This fracture may be distinguished from 

 dislocation by the deformity being removed on making sufficient extension, when crepitus may 

 be occasionally detected ; at the same time, on extension being discontinued, the parts imme- 

 diately resume their deformed appearance. The age of the patient will also assist in determining 

 whether the injury is fracture or separation of the epiphysis. The treatment consists in flexing 

 the forearm, and making powerful extension from the wrist and elbow, depressing at the same 

 time the radial side of the hand, and retaining the parts in that position by well-padded pistol- 

 shaped splints. 



MUSCLES AND FASCIAE OF THE LOWER EXTREMITY. 



The Muscles of the Lower Extremity are subdivided into groups, corre- 

 sponding with the different regions of the limb. 



Iliac Region. Obturator Internus. 



Psoas Magnus. Gemellus Inferior. 



Psoas Parvus. Obturator Extern us. 



Iliacus. Quadratus Femoris. 



THIGH. 



Anterior Femoral Region. 

 Tensor Vaginae Femoris. 

 Sartorius. 

 Rectus. 



Vastus Externus. 

 Vastus Internus. 

 Crureus. 

 Subcrureus. 



Internal Femoral Region. 

 Gracilis. 

 Pectineus. 

 Adductor Longus. 

 Adductor Brevis. 

 Adductor Magnus. 



HIP. 



Gluteal Region, 

 Glutens Max iin us. 

 Glutens Medius. 

 Glutens. Minimus. 

 Pjriformis. 

 Gemellus Superior. 



Posterior Femoral Region. 



Biceps. 



Semitendinosus. 



Semimembranosus. 



LEG. 

 Anterior Tibio-fibular Region. 



Tibialis Anticus. 

 Extensor Proprius Pollicis. 

 Extensor Longus Digitorum. 

 Peroneus Tertius. 



Posterior Tibio-fibular Region. 

 Superficial Layer. 



Gastrocnemius. 



Soleus. 



Plantaris. 



Deep Layer. 



Popliteus. 



Flexor Longus Pollicis. 

 Flexor Longus Digitorum. 

 Tibialis Posticus. 



