Try circadian rhythms, melatonin, searches around there will point you the
right way. People can be 'phase shifted' in their cycles, in Sleep and
Biological Rhythms there is mention of these shifts possibly correlating
with some pathologies (eg. depression).
John H.
Remove 4X in reply
Neuro <Neuro at nospam.com> wrote in message news:8qgefp$qbr$1 at wanadoo.fr...
> I want to know why brain only starts working properly from 5-6 PM to
> Midnight for some people, and why their attention level is very low all
the
> day before.
> Has anybody an explanation ? What's published on the topics ?
>> Thanks
>>
