Accused are genes and electricity

 A very spreading meaning, by a which an individual and right biorhythm in a those, who wake up on an early morning. But an owl, like a spoiled lark. And scienists-chronobiologists are put, that biologic lark biorhythm is a natural. Within all history,when  human is existence depended on from a sun. Humans   not allowed to wake up for very late, so they  are hunted, prepared herbs, berries, animals kept, and war just on  a light time of year. And such an old habit to build an own day by a sun are very deeply and hope stayed in our genes. And today in larks rhythms are living very far from civilization tribes, which in an own life orienting on a sky  luminary. Displayed an other types for biorhythms are owls, and lots of scientists  meaning ,like a fetus for a modern civilization.  With a manufacturing, electricity  and developed are such kinds for activity in human,that  they are stopped   depended on from a sun.  But on night walkers a  met on different times, but maybe here are fault theirs ancestors. And a last science facts are share, that a biologic rhythm a sleep -wakefulness  depend on from a work are nerve cells. And  cunning here ,that every nerve cell has own biologic hours.  And how they are work we are never knew. But probably on a right day a time cells are activity displaying activity, they are sensitiveness to the change for a time of a day.

And such facts, that chronotype defining by a genetically and evidenced Japan researchers. They are indicated genes, which answering for working biologic hours. And they are found in gene , which is inherent  for owls. He is a calling a gene, causing a syndrome for a genetical long sleep phase.But in humans by different reasons theirs are 5-15 percent and mutation too meeting in genes , in which inside  circadian rhythm is biasing.  And of course and syndrome for delay too having , when a  sleep deprivation and waking up are stable  biased on a late time,  so and syndrome for preliminary sleep period with a very early to sleep   and waking up. And for peoples with a such deviations, especially with a delay sleep phase are very hard entering a life rhythm, work, and in family staying.  Here is  problem keeping a medical diagnosis, which is trying curing with sedative, anti depressants, and other remedies.