Electro-physiology and electro-therapeutics : showing the best methods for the medical uses of electricity / By Alfred C. Garratt.

is found external to the vein and artery. The branches are for muscular, articular, and cutaneous ramifications. One branch supplies the interior of the knee joint. The communicans is a large branch of the popliteal, which interlaces with a large branch from the peroneal nerve, (which is from the femoral,) and these two together constitute the roots of the external saphenous nerve. Then this external saphenous becomes super- ficial on the upper middle of the posterior calf of the leg, rather inclining to the outer border of the tendo Achillis; it then winds around the outer mal- leolus, and is distributed superficially to the outer side of the foot as far as the little toe. The popliteal nerve also gives off the posterior tibial nerve, which runs deep-seated until it arrives at the ankle, after passing down the inner side of the tendo Achillis; and here some cutaneous branches pass down the inner side of the os calcis, to be lost in the integument of the heel. There are some branches of the posterior tibial nerve that entwine about the fibular artery, and supply the flexor longus pollicis, and then become superficial, to be distributed to the integument on the back of the leg and heel. The internal plantar nerve branch seeks the sole of the foot, and lies between the abductor pollicis and the flexor brevis digitorum muscles; but at the meta- tarsal bones it divides into three branches. One supplies the adjoining sides of the great and second toe ; the second supplies the adjoin- ing sides of the second and third toe; and the third, the corresponding sides of the third Fig and fourth toes. This order is the same pre- the Posterior Tibial _ . , . ., . -, , ,. ,. . Nerve in the Back of cisely as we observed in the hand by the digi- th6 Leg. 4IL 1, 2. Indicates its course and its Branches, the upper part of the Peroneal Nerve being seen to the right.