Roy Preston asked:
Why do some people blink more than others?
Most people blink once every two-to-ten seconds. Blinking can be triggered by dust or pollen, if you get hay fever in the summer like I do. Itís mainly controlled by nervous impulses from the brain. Everyone has a sort of blinking pacemaker in their brain and everyoneís is different. Everyoneís is set slightly differently.
This area of the brain is known as the chordate nucleus and it controls your blinking by sending impulses down the nervous system into the muscles around your eyelids. There are of course other things that can affect your blinking like fatigue and also some diseases like Parkinsonís and nerve disorders.
Whatís quite interesting is that when we blink we donít actually notice that weíre blinking because our brains filter out the signal. Itís the same as when you move your eyes around a room. Your brain cuts out the signal of when your eyes are moving so that you donít get confused and feel like the world is spinning. Itís called corollary discharge.
I suppose if you blink a lot itís probably because your brain makes it that way or you need to get more sleep.
Roy Preston asked the Naked Scientists: Dear Dr Chris, Some people, like for instance, Sir Liam Donaldson, the Chief Medical Officer, hardly ever blink. Me, I can manage about 15-seconds without blinking. Why is this? I'd love to know! Roy Preston What do you think? Roy Preston , Sun, 3rd Aug 2008
I'm sure I've read that men blink less frequently than women.
Not blinking much can also indicate a neurological disorder so don't believe in body language as being an accurate guide.
Many thanks for the responses. I could understand the reasons stated above if blinking were purely a voluntary action but, for me anyway, I have no choice in the matter. I just *HAVE* to blink! It's impossible for me to not blink.
I can avoid blinking for long time, naturally my blink rate is rather low. Much lower then 15 or 20 per minute wonder what it correlated with. Cruel, Fri, 30th May 2014