Psychasthenia is a mental disorder characterized by the impotence and weakness of a person’s mental qualities. For a long time in domestic psychiatry, psychasthenia was related to the classification of psychopathy. It is very important for psychasthenia to differentiate from nervous weakness (neurasthenia).
The modern classification of personality disorders does not have the exact equivalent of psychasthenic psychopathy, however, anancastient personality disorder came closest to it. The term psychasthenia was first introduced in 1894 by Pierre Janet.