As these place cells sent out signals, the researchers used the electrodes to send a reward signal to a different part of the mice brains. Essentially, they created a positive association with that a particular place, while the mice slept. Later, when the mice woke, they went directly toward the place that had been associated with the reward signal in their dreams. Similar studies have been done to show that rats may also plan future trips while they sleep.
Then, with the electrodes still in their brains, the rats took a nap. Researchers continued to monitor their place cell activity, and saw new patterns in the ways the cells send out signals.
Freud thought that dreams expressed our repressed desires. And so they do, sometimes, but much modern research suggests that dreams help in information processing and memory storage. In Inception, dream time runs much slower than real time, and there is a scaling effect, such that if you dream within a dream, time passes even more slowly. Read the rest over at New Scientist. When on a job, Cobb and his cohorts can move freely through dreams, fully aware of their situation and the non-reality they're occupying.
Proponents of lucid dreaming claim this to be perfectly possible. A lucid dream is essentially when the person recognizes they're dreaming, but is able to continue their adventure with this knowledge. Although research into the matter is ongoing, scientific studies suggest lucid dreams are inherently different to the usual kind, and while there's no way to share the experience with others yet , more recent developments have inched eerily closer to Inception territory.
In a report published in February available here , scientists claimed they were able to share a two-way conversation with a person in the midst of a lucid dream. The sleeper would hear audio cues from the lab, and then responding with specific eye movements, even solving simple math sums. This echoes how Cobb's team use musical cues to signal incoming wake-up kicks in Inception. Interestingly, experiments of this ilk have disproved Inception 's idea of time dilation in lucid dreams.
Although it often seems like time passes faster in dreams, lucid dreamers have shown an ability to keep count in time with the real world. Edging even closer into Christopher Nolan 's fictional world, studies were carried out with on-the-market drugs said to induce lucid dreaming as a side effect.
Although the results aren't conclusive, there is some indication that a drug could be used to increase the chances of experiencing a lucid dream, while various other products that allege to induce a lucid dream are also available. Expect Somnacin to hit a pharmacy near you soon! Layered dreaming is another part of Inception 's lore with a close, albeit somewhat less exciting, real life cousin.
Inception plays heavily on the "dream within a dream" idea, which is closely tied to the phenomenon of "false awakening. Outside of the movie, it's more common for the reverse to occur - a dreamer believes they've awoken, but are actually still inside a dream. Rather than the tier-style structure seen in Inception , however, this can more accurately be described as one single, lasting dream.
The ominous layer of Limbo is one of Inception 's more unlikely assertions. There is no way this is real. I'm obviously dreaming. I was experiencing what scientists call a lucid dream, or one in which the person sleeping is aware of the fact that they are not awake. It's a state that is well-known to psychology and sleep scientists; for generations, many have studied the art of intentionally inducing this state so that they can fly or cultivate other imaginative experiences.
Curiously, lucid dreaming may also be the key to communicating with the awake: a new study reveals that it is possible to communicate with someone while they are dreaming, although the catch is that it has to be a lucid dream.
The study's premise is reminiscent of the blockbuster sci-fi movie " Inception ," in which dream mercenaries are paid to enter others' dreams and manipulate them while unconscious. The paper , which was co-authored by a team of researchers and published in the journal Current Biology, involved a quartet of independent teams in the Netherlands, France, Germany and the United States.
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