Morphology of Schmidt-Lanterman incisures of human shoulder plexus nerves.

Morphological studies of peripheral human nerves have shown that the number o of Schmidt-Lanterman incisures in an internode is proportional to the fibre diameter. Quantitative and ultrastructural examinations of incisures in the shoulder plexus nerves of the juvenile have proved some common features in the distribution and structure of incisures, characteristic for the nerves of both mammals and people. However, in all probability, in the peripheral nerves of man under certain condition there is a mechanism, leading to a sharp increase of the number of incisures in the internodal segment.