Distribution of type A and type B monoamine oxidase activity in hypothalamic nuclei of the rat.

The regional distribution of type A, type A and B and type B activity of monoamine oxidase (MAO) in individual nuclei of the rat hypothalamus was studied according to quantitative micromethods with clorgyline as a specific inhibitor of type A MAO. As results, type A and type B MAO were distributed differently in the rat hypothalamus. It is suggested that type B MAO acts differently from type A MAO in regard to the function of the hypothalamus.