152 Bipolar and Related Disorders
C. Criteria are not met for “with melancholic  features” or “with catatonia” during the
same episode.
Note:  “Atypical depression” has historical significance (i.e., atypical in contradis-
tinction to the more classical agitated, “endogenous” presentations of depression
that were the norm when depression was rarely diagnosed in outpatients and al-
most never in adolescents or younger adults) and today does not connote an un-
common or unusual clinical presentation as the term might imply.
Mood reactivity is the capacity to be cheered up when presented with positive
events (e.g., a visit from children, compliments from others). Mood may become
euthymic (not sad) even for extended periods of time if the external circumstances
remain favorable. Increased appetite may be manifested by an obvious increase in
food intake or by weight gain. Hypersomnia may include either an extended period
of nighttime sleep or daytime napping that totals at least 10 hours of sleep per day
(or at least 2 hours more than when not depressed). Leaden paralysis is defined as
feeling heavy, leaden, or weighted down, usually in the arms or legs. This sensation
is generally present for at least an hour a day but often lasts for many hours at a
time. Unlike the other atypical features, pathological sensitivity to perceived inter-
personal rejection is a trait that has an early onset and persists throughout most of
adult life. Rejection sensitivity occurs both when the person is and is not depressed,
though it may be exacerbated during depressive periods.
With psychotic features:  Delusions or hallucinations are present at any time in the
episode. If psychotic features are present, specify if mood-congruent or mood-incon-
gruent:
With mood-congruent psychotic features: During manic episodes, the con-