[The respiratory reactions to thyroliberin action on the ventral surface of the medulla oblongata].

Applications of the TRH to the brain stem ventral surface of anesthetized rats increased the lung ventilation and essential changes in the breathing pattern. At the same time, electrical activity of inspiratory neurons was enhanced and that of expiratory neurons reduced (the ambiguous nucleus area). The data obtained suggest a major role of ventrolateral medulla in realization of the TRH respiratory effects.