Primary headaches. A primary headache is caused by overactivity of or problems with pain-sensitive structures in your head. A primary headache isn't a symptom of an underlying disease. Chemical activity in your brain, the nerves or blood vessels surrounding your skull, or the muscles of your head and neck (or some combination of these factors) can play a role in primary headaches.
The first flat screen TV was invented in July 1964 by a team at the University of Illinois. ... That year, LCD screens were sold in sizes up to 42 inches.
John Logie Baird is the person who is given credit for inventing the television for the very first time. He experimented in an attic room in London for years until he succeeded in transmitting an old, moving, grayscale image of a talking ventriloquist dummy on a screen in 1925. He called it âthe Televisorâ.