Distribution of Cutaneous Nerves on the Back
The distribution of the cutaneous nerves on the back of the trunk. On one side the distribution of the several nerves is represented, the letters indicating their nomenclature. Labels: G.O (C.2), great occipital; C.3, least occipital; T.1, et seq., posterior primary division of thoracic nerves; L.1, et seq., posterior primary divisions of first three lumbar nerves; S.1, et seq., posterior primary division of sacral nerves; Acr, acromial branches from cervical plexus; T.2-12, lateral branches of nerve; E.C, external cutaneous nerve; S.Sc, small sciatic nerve. One the other side a schematic representation is given of the areas supplied by the above nerves, the numeral indicating the spinal origin of the branches of distribution to each area.