[Formation of the vascular-receptor connections in the human forearm muscles]

The data on formation and construction principles of the blood supply system in the terminal sensitive apparatuses of the human forearm muscles during embryogenesis and early postnatal period are presented. During the intrauterine development, the formation of the vascular-receptor relations takes place in the sequence corresponding to the anlage of the receptors. The first blood vessels appear in the area of the nonencapsulated sensitive terminals and only after in the encapsulated receptors. The latter have their own blood supply system which is formed by the vessels of the intramuscular neural fasciculi and the surrounding muscular tissue. Around the sensitive terminals thick microvascular networks are formed, they often tightly adhere the external receptor capsule. The intrareceptor capillaries are situated in the mass of the neural terminals and sometimes form capillary loops in them.