We use our mind in every second of our live. Our mind is the only reason why we called human. Alot of us still dont understand how our mind works. The brain is a befuddling organ, as are the very questions of life and death, consciousness, sleep, and much more. In this article, we will talk about the biggest mysteries of our mind. Scientifical explanation will be shown to help us to understand how our mind work.
There are alot of different explanation about what dreams are made of. The scientists themself still dont understand what dreams are really mean. One possibility: Dreaming exercises brain by stimulating the trafficking of synapses between brain cells. Another theory is that people dream about tasks and emotions that they didnâ€™t take care of during the day, and that the process can help solidify thoughts and memories. In general, scientists agree that dreaming happens during your deepest sleep, called Rapid Eye Movement (REM).
Why we need to sleep? We spend more than a quarter of our live. The reason of why we need to sleep is still unclear until now.One thing scientists do know: Sleep is crucial for survival in mammals. Extended sleeplessness can lead to mood swings, hallucination, and in extreme cases, death. There are two states of sleepâ€”non-rapid eye movement (NREM), during which the brain exhibits low metabolic activity, and rapid eye movement (REM), during which the brain is very active. Some scientists think NREM sleep gives your body a break, and in turn conserves energy, similar to hibernation. REM sleep could help to organize memories. However, this idea isnâ€™t proven, and dreams during REM sleep donâ€™t always correlate with memories.
Itâ€™s estimated that about 80 percent of amputees experience sensations, including warmth, itching, pressure and pain, coming from the missing limb. People who experience this phenomenon, known as "phantom limb," feel sensations as if the missing limb were part of their bodies. One explanation says that the nerves area where the limb severed create new connections to the spinal cord and continue to send signals to the brain as if the missing limb was still there. Another possibility is that the brain is "hard-wired" to operate as if the body were fully intactâ€”meaning the brain holds a blueprint of the body with all parts attached.
Our body was programed by our mid. In the hypothalamus of the brain, the suprachiasmatic nucleus, or biological clock, programs the body to follow a 24-hour rhythm. The most evident effect of circadian rhythm is the sleep-wake cycle, but the biological clock also impacts digestion, body temperature, blood pressure, and hormone production. Researchers have found that light intensity can adjust the clock forward or backward by regulating the hormone melatonin. The latest debate is whether or not melatonin supplements could help prevent jet lagâ€”the drowsy, achy feeling you get when "jetting" across time zones.
Some experiences are hard to forget, like perhaps your first kiss. But how does a person hold onto these personal movies? Using brain-imaging techniques, scientists are unraveling the mechanism responsible for creating and storing memories. They are finding that the hippocampus, within the brainâ€™s gray matter, could act as a memory box. But this storage area isnâ€™t so discriminatory. It turns out that both true and false memories activate similar brain regions. To pull out the real memory, some researchers ask a subject to recall the memory in context, something thatâ€™s much more difficult when the event didnâ€™t actually occur.
Why we laugh when our friend tell us some jokes? Scientist still dont understand this human behaviours.Scientists have found that during a good laugh three parts of the brain light up: a thinking part that helps you get the joke, a movement area that tells your muscles to move, and an emotional region that elicits the "giddy" feeling. John Morreall, a pioneer of humor research at the College of William and Mary, has found that laughter is a playful response to incongruitiesâ€”stories that disobey conventional expectations. Others in the humor field point to laughter as a way of signaling to another person that this action is meant "in fun."
Nature vs. Nurture
In the long-running battle of whether our thoughts and personalities are controlled by genes or environment, scientists are building a convincing body of evidence that it could be either or both! The ability to study individual genes points to many human traits that we have little control over, yet in many realms, peer pressure or upbringing has been shown heavily influence who we are and what we do.
Why human getting old? There are alot of explanation about this.We were born with a robust toolbox full of mechanisms to fight disease and injury. But as we age, the bodyâ€™s repair mechanisms get out of shape. In effect, your resilience to physical injury and stress declines. The first explanation why we need to age is, aging could just be a part of human genetics and is somehow beneficial. In the less optimistic view, aging has no purpose and results from cellular damage that occurs over a person's lifetime. A handful of researchers, however, think science will ultimately delay aging at least long enough to double life spans.
Cryonics centers like Alcor Life Extension Foundation, in Arizona, store posthumous bodies in vats filled with liquid nitrogen at bone-chilling temperatures of minus 320 degrees Fahrenheit (78 Kelvin). The idea is that a person who dies from a presently incurable disease could be thawed and revived in the future when a cure has been found. The body of the late baseball legend Ted Williams is stored in one of Alcorâ€™s freezers. Like the other human popsicles, Williams is positioned head down. That way, if there were ever a leak in the tank, the brain would stay submerged in the cold liquid. Not one of the cryopreserved bodies has been revived, because that technology doesnâ€™t exist. For one, if the body isnâ€™t thawed at exactly the right temperature, the personâ€™s cells could turn to ice and blast into pieces.
Consciousness has become a complex topic in the scientific community since antiquity. Only recently have neuroscientists considered consciousness a realistic research topic. The greatest brainteaser in this field has been to explain how processes in the brain give rise to subjective experiences. So far, scientists have managed to develop a great list of questions.