50 



THE ELASTIC TISSUES OF THE FOOT, 



This, however, is not elastic, but of a fibrous nature. The sides 

 of the expanded portion of the Inilbs cover the lower parts of 



Fig. 32. —Plantar cushion, seen 

 from below, a, base ; b, point ; 

 <;, groove for receiving frog- 

 stay. 



Fig. Sii. — Plantar cushion seen from 

 above, a, base ; b, point ; c, origin 

 of the "suspensory ligament of 

 bulbs"; d, spot where the elastic 

 ligament running to the lateral 

 cartilage becomes attached. 





the plantar cushion, and are, as already stated, so intimately 

 connected with the posterior part of the lateral cartilage that 



no sharp boundary can be traced be- 

 tween the two, the cartilaginous material 

 penetrating the elastic, and the elastic 

 the cartilaginous (fig. 35). Anteriorly, 

 FIG. 34.-verticai mesial se^ion thc bulbs arc coutinucd obliqucly down- 

 ^^,^:S^ir:^^:^l wards and forwards over the superior 

 for frog-stay. surface of the plantar cushion (figs. 33 



and 34). From this surface a number of broad elastic bands 



run to the elastic reinforcinf' 

 band of the perforans ten- 

 don, to which part they 

 become attached ; other por- 

 tions may be traced in an 

 upward direction. The 



under surface of the Ijulbs 



Fig. 35.— Vertical section of foot from side to side, and the Ulldcr and both 



at a point corresponding to the centre of the , i i? 



frog's greatest length. «, posterior part of plan- lateral SUrtaCCS of the plan- 

 tar cushion ; b, frog-stay ; cc, lateral cartilages. , . 



Xote the prolongations into the substance of the tar CUShlOU are Clothca by 

 plantar cushion, d, wall ; e, lateral aspect of i i c 



frog; /, junction of frog and bar; g, skin; h, a VaSCUlar membrane, irom 

 coronary band ; *, modified corium covered with i • i i i 



blood-vessels ; k, foramina in lateral cartilage WlllCQ the homy irOg IS 

 for passage of blood-vessels. , i c i • 



secreted ; tor this reason all 

 the central part of the plantar cushion has been termed the 



«' 



