[A case of delusional melancholia: "a variant of loss of psychological self-activation"?].

A 62 year-old man presented with melancholia with delusions, possibly resulting from lenticular lesion in the left and frontal damages in the right. Atypical signs of our observation led us to consider our patient not as suffering of affective disorder. We suggest that melancholia could be a consequence of a certain type of stereotyped mental activity, and we would compare this stereotyped mental activity to mental compulsive activity described in "loss of psychic self activation" of D. Laplane. In this perspective our observation would be a variant of "Loss of psychic self-activation". Heuristic value of this concept is discussed.