Why area's of someone's body moves or blinks suddenly unintentionally,as it happens in eyes 4 e.g?
448579
Usually due to a chemical imbalance in the muscle.
506570
its this thing called reflex arc. see this pic n u might get it. it has stuff to do with neurons n i dont feel like writing the whole crap.\nlol thnx hmmm didnt see wat is said :) its actually\nhttp://dtc.pima.edu/~biology/201alpha/lesson10/reflexarc.jpg
575371
Maybe checking the contraction/dilation reflex of the pupil. Also sometimes doctors examen the back of the retina, it reveals certain conditions in the brain...\n\nWhy haven't you asked your docotr?
542519
you can tell when someone stares into your eyes and you automatically feel something.
157616
It looks like it's just a reflex. No one really knows why it happens (and it turns out that there are SOME people who are able to hold their eyes open.)
469048
Your eyes will NOT pop out!  It is simply a protective reflex.  There is so much going on: abdominal contraction, sharp burst of air from the lungs, lunging movement that the body closes the eyes automatically to protect them.
447206
It's an uncontrolled reflex. Most scientists can't explain it either.
372583
See your eye doctor about this as soon as you can.  You shouldn't experience any sudden vision changes, so this could be a sign of something else that's going on.
733292
we blink to keep moisture on our eye so it doesn't dry out--when it does start to dry your eye will feel itchy and super uncomfortable--there is some people that can withhold blinking for long periods of times but not "a couple of hours" plus blinking is implusive most of the time meaning that we can't control it our body just does it for us-kinda like breathing\n\nif you found this helpful please select as "best answer" so both me and you get points!
1098358
well its complicated but one of the members (i cant remeber) has a eye disordor which makes him blink rapidly. the members timed 1 minute to see how many times he blinked and it was 182 times
1023954
the idea is the same as why trainers shine a light into a football players eyes after he suffers a big hit.  If you've truly been 'knocked out' your eyes become unfocused to point of not reacting to bright lights.  If you squint or blink at the light then you really haven't truly had your bell rung.
474768
(m)\n\nHave you ever wondered what makes the muscles around your eyes twitch and flutter from time to time? The answer to this question is relatively simple. And so is the remedy. \n\nAll of the six hundred plus muscles that exist throughout your body and head are supplied by nerves that originate in your brain. If you take it from the top, your brain induces a signal that travels down through your brain stem and spinal cord and out through peripheral nerves to reach each of your muscles. The flow of electricity through this pathway is what allows you to have motor control over your muscles.\n\nYour brain and spinal cord are much like the water tower in your city. Both are full of energy and just itching to gush electricity and water out through peripheral nerves and city water pipes, respectively. In the case of your municipal water supply, you are able to regulate how much water comes out of the pipes in your home with your faucets. In the case of your body, your peripheral nerves are your faucets and must regulate how much electron flow is allowed to come out of your spinal cord and travel to your muscles. \n\nGetting back to what causes a twitching eye, the twitching muscle in question is called your orbicularis oculi muscle. This muscle has two parts: a palpebral part that allows you to open and close your eyelids, and an orbital part that allows you to have a wide range of expressive looks with your eyes, a good example being when your eyes open really wide with surprise.\n\nThe peripheral nerve that acts as a faucet for your orbicularis oculi muscle is called the temporal branch of your facial nerve. So, for you to open and close your eyelids or open your eyes as wide as possible, the temporal branch of your facial nerve must allow just enough electricity to come out from your brain and brain stem and travel to your orbicularis oculi muscle. \n\nIn the vast majority of cases of a twitching or fluttering eye, the problem is with the temporal branch of the facial nerve. When this nerve becomes fatigued, it acts like a worn down water faucet - the flow of electrons is no longer smooth and even. The result is that your orbicularis oculi muscle will twitch or flutter as it receives jolts of uncontrolled information from your brain and brain stem. \n\nIn case you missed it, I just gave you the answer to the most common cause of a twitching eye: fatigue. And fatigue goes hand in hand with stress. \n\nWhen the muscles that surround your eyes twitch and flutter, chances are very good that you are fatigued and stressed. So the remedy for a twitching eye is rest and relaxation.\n\nNot muscle relaxants, not pain killers, not chiropractic adjustments.
521872
Its called Nystagmus.  It means involuntary movement of the eyes.  If you have not already done so see an eye doctor to rule out any eye diseases and also see your family doctor to rule out neurological problems. Usually it is hereditary and doesn't cause any problems but you MUST rule out serious health problems first.
136194
Don't feel embarrassed, It has happened to me several times. I think your mind is still awake in a certain sense and you have trained your body that when you fall, to reach your arms out and catch you...so your brain reacts to that and does so.
348452
The scientific explanation is simple enough.  It is the automaticity of stimulus response.  There are numerous other stimulus response automaticities "built into" the humanoid organism. Another specific would be the shiver mechanism that automatically kicks in (for some humans) upon exposure to a suddenly colder temperature.
520140
I'm guessing by moving your legs you're moving blood up to your brain.  \n\nSoldiers who stand at attention too long can faint, because there's no movement to get blood up to the brain.
456370
Hmmm, could be different things.  \n\nGenerally flashes can be one whole thing.  One way this happens is when blood is rushing out of the head to other parts of the body(Like when someone is about to faint).  Standing up really fast after sitting a long while you can see dots of light floating around like a cartoon character would see stars after getting hit on the head with a mallet.\n\n"Floaters" can be a whole other.  Whenever you stare at bright light, temporarily part of your vision will "turn off" to protect itself.  Then you'll have a little black spot(or a while spot in the dark) floating around like bug.  Sometimes they can be permanent(in extreme cases, like staring at a solar eclipse), but usually for other medical reasons.\n\nThose are just examples, but there are lots of reasons why you can see odd things in your vision.  For example, I have strabismus(crossed eyes).  When an eye tries to jerk to one side really fast I sometimes see a black splotch in my vision for a second.  I've been told that's because the fast jerk is pulling the optic nerve on the back of my eye.  And the splotch is the back of the nerve on the retina(the "movie screen" part of your eye).\n\nWell, these are just examples.  But yea, go see a doctor.  I bet insurance would cover it and you won't lose anything.  Even if you've had this problem for years, it could get worse.  You never know.\n\n(Just if anyone was curious: I did have crossed eyes, but I had surgery to correct it cosmetically.  However, crossed eyes are not caused by the eye muscles being defective but by a lack of control of them.  It is more of a palsy because eye training can't completely "fix" the problem.  Cutting the muscle to weaken them does mask the "jerky" control, thereby giving cosmetically straight eyes.)