In fact, this statement can't fully explain the problem of insomnia, because the magnetic poles of the earth are not divided into south and north, but have a certain inclination angle. At every point on the earth, the so-called direction in line with the earth's magnetic field lines is not exactly on time. The direction of the earth's magnetic field lines will change according to day and night and all the year round.
However, the orientation of the house and the bed will not change with the change of the earth's magnetic field lines, and no one will always adjust the direction of the ship, so this statement cannot be fully recognized.
Extended data
Sleep is also a process of memory cell metabolism: aging cells input every arrangement of memory information into new cells for storage. Including sports, language areas, balance keys, some past events and memories in daily life. They are all matter, so they also exist in the form of matter.
If a person's long-term lack of sleep causes memory cells to live healthily, it is prone to some health problems, even diseases, such as aphasia, convulsions, convulsions, or shock and fainting caused by forced sleep. It is easy to become cancerous after a long time.
Baidu encyclopedia-sleep