[Morphological and functional changes of free sensory receptors of the frog urinary bladder during regeneration]

Dynamics of morphological and functional changes of bush-like sensory receptors including free visceroreceptors of the frog urinary bladder were investigated. For this purpose surgical operation was performed to intersect the ischiococcygeal plexus. It was demonstrated that 1) receptors can generate spontaneous impulse activity up to 18th postoperative day. In this stage one part of afferent fibres was left undamaged, although the others demonstrated the Wallerian degeneration features; 2) regeneration of fibres began after a postoperative month 3) first remyelinated fibres were registered in nerve bundles following 2-3 months; at the same time non myelinated distal regions left bundles and form non myelinated arbors in the surrounding tissues. The receptor impulse activity was registered simultaneously; 4) morphological features of growing bush-like receptors at light optic level differed from those in native state; 5) maturation of regenerating receptors was finished a year later.