EXAMINATION OF SOME SPINAL NERVES 
lOI 
The accompanying iigure (ya) illustrates better tlian verbal description the position and 
extent of the area in the limb-surface. It indicates that in Man the skin-field of the internal 
saphenous nerve does not descend (in some individuals at least) much further upon the foot 
than to include the inner aspect of the ankle ; also that on the front of the leg it includes more 
of the peroneal aspect than is supposed. It makes probable the greater wrapping round the thigh 
and kjiee of the cutaneous branches of the femoral and obturator-nerves ; so that the internal 
Fig. 9 
Internal saphenous 
External saphenous. 
Field of anesthesia by 
cutting ant. tibial and 
musculo-cutaneous ; ex- 
ternal plantar above its 
communication from ex- 
ternal saphenous. 
External saphenous. 
Internal plantar. 
cutaneous and obturator sweep from the inside back as far as the middle line of the ham, calf, and 
thigh ; while on the outer side the external cutaneous innervates skin over the outer hamstring 
head of the fibula, and a portion of the outer head of the gastrocnemius, and extends, perhaps, a 
fourth of the way from knee to ankle, instead of being confined to the thigh. This distribution 
in these directions, more extended than is usually supposed, favours the supposition that the 
overlapping of the skin-fields of the peripheral nerve-trunks is greater than is generally thought. 
Returning to the skin-fields of the peripheral nerve-trunks supplying tlie Monkey's foot 
