interesting study showing seasonal changes to brain functions
Agata, you didn't tell us about this yet :-)
"the present study provides compelling evidence for previously unappreciated annual varia- tions in the cerebral activity required to sustain ongoing cognitive processes in healthy volunteers. The data further show that this annual rhythmicity is cognitive-process-specific (i.e., the phase of the rhythm changes between cognitive tasks), speaking for a complex impact of season on human brain function. Annual var- iations in cognitive brain function may contribute to explain intraindividual cognitive changes that could emerge at specific times of year."