[Structuro-functional analysis of the activity of frog bladder bushy mechanoreceptors]

Adequate stimulation of the frog bladder bush receptors increases the firing rate of afferents, enhances and rounds off the end-plates, and diminishes the ability for vital staining with methylene blue. The extreme stimulation (overstretching of the wall) decreases the firing rate, does not affect the size of the end-plates, rounds them off and sharply diminishes the vital staining. These morphological phenomena seem to be a structural equivalent of induced functional states.