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.
The first TV broadcast was in 1939 in New York, and the TV was invented by an Idaho f â¦ arm boy named Philo Farnsworth, who invented many other things in his lifetime. His television, the first with no mechanical parts that could actually broadcast an image was demonstrated in 1929. + 20 others found this useful.