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Allocation of Function to Specific Fiber Types in Peripheral Nerves

1932; SAGE Publishing; Volume: 30; Issue: 3 Linguagem: Inglês

10.3181/00379727-30-6462

1535-3702

P. Heinbecker, G. H. Bishop, J. L. OʼLeary,

Shoulder Injury and Treatment

In a recent communication (Heinbecker, Bishop and O'Leary1) the fibers in a skin nerve associated with the sensations of touch and of pricking pain were identified. Knowing that the fibers responsible for such pain are included in a well-defined group of small myelinated ones, and that those for touch fall in a different group of larger fibers, we have two points of reference for locating other functions. The differential susceptibility of nerve fibers to novocaine permits a further assignment of various functions mediated by nerves, to known fiber groups. Such fiber groups can be recognized by their potentials when stimulated, and in novocaine anesthesia the differential blocking of these potentials can be correlated with the differential disappearance of sensations.Observations were made on 3 surgical patients to determine the order of disappearance and reappearance of various sensations and of skin temperature changes during low spinal anesthesia produced by dissolving novocaine crystals in spinal flui...