222 - MUSCLES OF THE LOWER EXTREMITY. 



their actions to the deep flexors : they were called by the earlier 

 anatomists, fidicinii, L e. fiddlers' muscles, from an idea that they 

 might effect the fractional movements by which the performer is 

 enabled to produce the various notes on that instrument. 



In relation to the axis of the hand, the four dorsal interossei are 

 abductors, and the three palmar, adductors. It will therefore be 

 seen that each finger is provided with its proper adductor, and ab- 

 ductor, two flexors, and (with the exceptions of the middle and ring 

 fingers) two extensors. The thumb has moreover a flexor and ex- 

 tensor of the metacarpal bone ; and the little finger a flexor of the 

 metacarpal bone without an extensor. 



MUSCLES OF THE LOWER EXTREMITY. 



The muscles of the lower extremity may be arranged into groups 

 corresponding with the different regions of the hip, thigh, leg, and 

 foot, as in the following table: 



HIP. 



Gluteal Region. 



Gluteus maximus, 

 Gluteus medius, 

 Gluteus minimus, 

 Pyriformis, 

 Gemellus superior, 

 Obturator internus, 

 Gemellus inferior, 

 Obturator externus, 

 Quadratus femoris. 



THIGH. 



Anterior femoral Region. Internal femoral Region. 



Tensor vagina femoris, Iliacus internus, 



Sartorius, Psoas magnus, 



Rectus, Pectineus, 



Vastus internus, Adductor longus, 



Vastus externus, Adductor brevis, 



Crureus. Adductor magnus, 



Gracilis. 



Posterior femoral Region. 



Biceps, 



Semitendinosus. 



Semimembranosus. 



