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VAN RuJNBERK call it, the toppart of the field of lumbalis V now 
extends as far as half way the upperleg, now as far as above the 
trochanter. The height to which the sensitive field of lumbalis VI 
rises, varies likewise but not so much as with lumbalis V. These 
two dermatomes extend in their proximal parts almost entirely over 
the lateral side of the leg. Much less so on the innerside, as 
WINKLER and VAN RIJNBERK found with the dog. These fields are, 
it is true, likewise with the cat turned inwardly. These distal slips 
into which these two fields are extended vary likewise very consi- 
derably. Now this slip extends with lumbalis V as far as the region 
between the malleolus internus and the caleaneus, now as far as 
half way the interior rim of the foot or the metatorso-phalangial 
joint. The most distal slips of this field extend as far as the first 
toe, even the entire first toe can fall inside this field. Lumbalis VI 
includes here the first, the first two or the first three toes. 
The 3'¢ topfield offers likewise rather important variations in 
situation and extent. Usually the field reaches proximally as far as 
a few cin. above the calcaneus, but it can likewise here extend as 
far as the fossa poplitea. The field encloses then the foot laterally 
and plantary. Sometimes only the lateral toe falls inside this field, 
another time the 2 or the 3 lateral toes. Incidentally all the toes 
are innervated from this root. In this latter case this field encloses 
the foot as a low shoe with an opening at the dorsal side increasing 
from the first toe as far as the lowerleg. These 3 topdermatomes 
present rather strong variations in shape and situation. Apparently 
these variations are strongest distally near the foot. We saw that 
the number of toes, falling inside each of these fields varies con- 
stantly. I must however point out that suchlike variations are not 
caused by important variations of extent. A slight variation in the 
extent of a sensitive field is already sufficient to bring one toe more 
or less within this field. An equal variation in the extent of a more 
proximal part of the field would make little impression. A slight 
shifting in the level of design before the extremity is most felt 
exactly at the most peripheric part of the extremity. The strongly 
pronounced differentiation of the shape of the extremities at the 
terminations is the cause of this fact. 
Sacralis 1 and 2 are both again in touch with the dorsal and 
likewise with the ventral medianline. Sacralis 1 is especially in the 
distal parts very variable. The tongue that projects here at the 
lateral side of the extremity, can reach now as far as the calve- 
muscles, now as far as the calcaneum or halfway along the lateral 
rim of the foot and at last even enclose the little toe. In the cases 
