Tell me more ×  I'm wondering if the human brain "predicts" how
certain weeks of the year should feel?  For example, a child who
is going to school may have a more positive affect in
anticipation of summer holidays, and may feel more negatively
towards the end of the summer, as he/she knows that freedom and
fun are about to end.  Another example may be siblings' or
parents' birthdays, where the anticipation of the birthday
increases positive affect.  I'm wondering if year after year of
such patterns (in childhood, the teenage years and maybe young
adolescence) can create an association in the brain between
positive/negative affect and the specific time of the year, or
specific photoperiod duration (day length). What I'm trying to
understand is, if a pattern of such ups and downs that may have
been established in the childhood persists throughout adulthood?
Have there been any studies that looked at the previous life
history and incidence of mania/depression episodes in bipolar
disorder, or the onset of depre