[Formation of the neurovascular connections in human forearm muscles]

The data on the vascular bed formation and construction of intraorganic nerves of the human forearm muscles in embryogenesis are presented. It is stated that in the process of development the following stages can be revealed in microvessels of the neural fasciculi: a) prevascular (up to 3 months of the intrauterine development, b) initial stage of formation of neuromuscular connections (3--5 months of embryogenesis), c) developed stage (the second half of embryogenesis). In the intraorganic nerves, microvessels are arranged in several layers. The first is situated on the surface of the neural fasciculi, outside the perineurium; the second is situated in the bulk of the latter, between its cellular-fibrillar layers. The third group of the microvessels is within the nerve, between its fibres. In thin fasciculi they are presented by single microvessels. In thick and middle-sized intraorganic nerves, there are several similar vascular capillaries, connecting with each other, they form capillary loops.