260 PLANTAR FASCIA. 



The lateral portions are thin, and cover the sides of the sole of the 

 foot ; they are continuous behind with the internal and external an- 

 nular ligaments ; on the inner side with the middle portion, and ex- 

 ternally with the dorsal fascia. 



Besides constituting a strong layer of investment and defence to 

 the soft parts situated in the sole of the foot, these three portions of 

 fascia send processes inwards, which form sheaths for the different 

 muscles. A strong septum is given off from each side of the middle 

 portion of the plantar fascia, which is attached to the tarsal bones, 

 and divides the muscles into three groups, a middle and two lateral; 

 and transverse septa are stretched between these to separate the 

 layers. The superficial layer of muscles derive a part of their ori- 

 gin from the plantar fascia. 







