Sentence:  Important as these differences are , they should not obscure the basic fact that by shifting the hypothalamic balance sufficiently to the parasympathetic side , we produce depressions , whereas a shift in the opposite direction causes excitatory effects and , <WSD>eventually</WSD> , maniclike changes . 
Meaning of the word marked with <WSD> tags:  after an unspecified period of time or an especially long delay