अगर समय रूक जाए तो hindi eassy
Answers
It started as a headache, but soon became much stranger. Simon Baker entered the bathroom to see if a warm shower could ease his pain. “I looked up at the shower head, and it was as if the water droplets had stopped in mid-air”, he says. “They came into hard focus rapidly, over the course of a few seconds”. Where you’d normally perceive the streams as more of a blur of movement, he could see each one hanging in front of him, distorted by the pressure of the air rushing past. The effect, he recalls, was very similar to the way the bullets travelled in the Matrix movies. “It was like a high-speed film, slowed down.”
See readers' stories of how they experienced time standing still
The next day, Baker went to hospital, where doctors found that he had suffered an aneurysm. The experience was soon overshadowed by the more immediate threat to his health, but in a follow-up appointment, he happened to mention what happened to his neurologist, Fred Ovsiew at Northwestern University in Chicago, who was struck by the vivid descriptions. “He was a very bright guy, and very eloquent” says Ovsiew, who recently wrote about Baker in the journal NeuroCase. (Baker’s identity was anonymised, which is typical for such studies, so this is not his real name).
It’s easy to assume that time flows at the same rate for everybody, but experiences like Baker’s show that our continuous stream of consciousness is a fragile illusion, stitched together by the brain’s clever editing. By studying what happens during such extreme events, researchers are revealing how and why the brain plays these temporal tricks – and in some circumstances, they suggest, all of us can experience time warping.
Although Baker is perhaps the most dramatic case, a smattering of strikingly similar accounts can be found, intermittently, in medical literature. There are reports of time speeding up – so called “zeitraffer” phenomenon – and also more fragmentary experiences called “akinetopsia”, in which motion momentarily stops. For instance, travelling home one day, one 61-year-old woman reported that the movement of the closing train doors, and fellow passengers, was in slow motion and “broken up”, as if in “freeze frames”. A 58-year-old Japanese man, meanwhile, seemed to be experiencing life like a badly dubbed movie; in conversation, he found that although others’ voices sounded normal, they were out of sync with their faces. There may be many more unreported cases, says Ovsiew. “Since it’s a transient phenomenon, it could often be overlooked.”
Such experiences almost always accompany problems like epilepsy or stroke. Baker was only 39 at the time of his experience, which seems to have been caused by a weakened blood vessel that began bleeding while he was carrying some heavy boxes. The result was a relatively large patch of neural damage in the right hemisphere. “In the scans, it looks like there’s a cigar in my head,” he jokes today.
Yet why did this affect Baker’s time perception? Some clues could come from studies that have attempted to pinpoint the regions responsible for our perception of time. Of particular interest is an area of the visual cortex, called V5. This region, which lies towards the back of the skull, has long been known to detect the motion of objects, but perhaps it has a more general role in measuring the passing of time. When Domenica Bueti and colleagues at the University Hospital of Lausanne, Switzerland zapped the area with a magnetic field to knock out its activity, her subjects found it tricky to do two things: they struggled to track the motion of dots on a screen, as would be expected, but also found it hard to estimate how long some blue dots appeared too.
One explanation for this double-failure is that our motion perception system has its own stopwatch, recording how fast things are moving across our vision – and when this is disrupted by brain injury, the world stands still. For Baker, stepping into the shower might have exacerbated the problem, since the warm water would have drawn the blood away from the brain to the extremities of the body, further disturbing the brain’s processing.