Surgery.

Date:: [1913]

Credit: Surgery. Source: Wellcome Collection.

83/412 (page 67)

$tibial, the extensor digitorum longus, extensor digit- orum brevis, extensor liallucis longus, tibialis anterior, and peroneus tertius. Accordingly, all the evertors and also the dorsiflexors are supplied by means of the lateral popliteal. How may the Lateral Popliteal be Injured ? The outer part of the great sciatic may be damaged, or the lateral popliteal torn in fractures of the neck of the fibula. It has been severed in scythe wounds around the knee. Clinically the leading feature is “ drop-foot.” Later on in untreated cases, talipes equino-varus results. What does the Medial Popliteal Nerve Supply ? The medial popliteal (tibial) takes origin from the last two lumbar and first three sacral nerves. It supplies :— Skin.—Through its plantar branches—the heel, sole of foot, and on the dorsum, the nails. Joints.—Knee, tarsal, and metatarsal. Muscles.—Gastrocnemius, soleus, plantaris, and pop- liteus. Through the posterior tibial, the tibialis posterior, flexor digitorum longus, and flexor liallucis longus. By means of its plantar branches, the intrinsic muscles of the sole, including the interossei. Describe Injury of the Medial Popliteal. The medial popliteal is rarely injured. It may, however, be damaged by the pressure of a popliteal aneurysm or of a sarcoma of the lower end of the femur. Dorsiflexion of the ankle may result, and later on a talipes calcaneo valgus deformity. The nerve can be reached by a vertical incision in the middle of the popliteal space. Describe Neuralgia. Neuralgia is the term applied to pain along the course of a sensory nerve. It may result from irritation due to pressure on the nerve, from toxic causes or from no obvious$

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