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Memories of our life stories may be reinforced while we catnap, MIT researchers sign in in the advance online issue of Nature Neuroscience.

Matthew A. Wilson, professor of brain and cognitive sciences at MIT’s Picower Originate for Learning and Memory, and postdoctoral associate Daoyun Ji looked at what happens in rats’ brains when they conjure up about the mazes they ran while they were awake.

In a landmark 2001 study, Wilson showed that rats formed complex memories exchange for sequences of events well-informed while they were awake, and that these memories were replayed while they slept-as the case may be reflecting the gross corresponding of dreaming.

Because these replayed memories were detected in the hippocampus, the memory center of the cognition, the researchers were not clever to determine whether they were accompanied by the type of sensory encounter that we associate with dreams-in particular, the sang-froid of visual imagery.

In the latest experiment, by recording capacity activity simultaneously in the hippocampus and the visual cortex, Wilson and Ji demonstrated that replayed memories did, in fact, suppress the visual images that were present during the continuous experience.

“This introduce brings us closer to an understanding of the complexion of animal dreams and gives us important clues as to the role of snore in processing memories of our past experiences,” Wilson said.

Reinforcing memories

By recording the spiking patterns of electrodes in individual neurons in the rats’ brains, Wilson is proficient to compare the activity of the neurons when the animal is on guard and asleep. It turns out that neurons activated when the animal experiences an event while on the alert are reactivated during rest.

In wing as well as, the tract of the cortex that processes input from the senses and the hippocampus “talk” to each other during have a zizz, leading researchers to speculate that this handle reinforces and consolidates memories.

But probe to date lacked specific evidence that episodic tribute-times, places and emotions related to events that make up our life stories-is reinforced in the cortex, the hippocampus or both during sleep.

Through despite the first habits, this work shows that the brain is replaying celebration events in two locations at moment-in the visual cortex and in the hippocampus.

“These results imply contemporaneous reactivation of coherent memory traces in the cortex and hippocampus during sleep that may provide to or reflect the result of the remembrance consolidation process,” Wilson and Ji wrote.

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Article adapted by Medical Info Today from original crush release.
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This work is supported by the Brain Science Institute at the Institute of Navy surgeon and Chemical Research (RIKEN) in Japan and the Patriotic Institutes of Condition.

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Massachusetts Institute of Technology

Radical new dental technology could manner the ruin surpass of the drilling and filling misfortune various endure at the dentists.

Scientists in Britain have developed a mouthwash that allows plaque-causing bacteria to be destroyed using nothing but a bright light, the light could possibly be attached to the head of a toothbrush.

The researchers say they have been experimenting with standard white light such as a conventional security light.

The new technology works in much the same way as some skin cancer treatments and may be available within three years for use at home.

According to the research team at Leeds Dental Institute a “repair solution” to help the body grow new enamel is also being developed which could do away with the need for “drilling and filling”.

The two projects are led by Professor Jennifer Kirkham, who believes they could make a big difference to dental care.

Professor Kirkham says the mouthwash which uses “photodynamic therapy” could help people who find it hard to use a toothbrush and could also be used to treat gum disease which is a major cause of tooth loss.

Antibacterial molecules in the mouthwash are absorbed only by plaque-causing bacteria, and activated when a bright light is shone into the mouth, killing them.

The technique is similar to that used in certain types of skin cancer, where the substance is painted on the target area, taken up by cancer cells, then exposed to light of a certain wavelength, which activates it to kill the cancer cell.

The researchers say though the molecule is considered to be safe for human consumption, full trials have yet to be completed.

Professor Kirkham says the team are looking for safe new ways to control plaque which do not rely on toothpaste as many who are disabled in some way or another are not able to brush effectively.

Researcher Dr Simon Wood says machines offering photodynamic therapy in dental clinics are already in use, but the aim was to find a way the mouthwash could be used at home.

The “repair solution” which is made from a protein which encourages the laying down of new enamel over microscopic holes in teeth, including those caused by acid produced by plaque bacteria.

The solution is painted on the teeth, it enters the holes and creates a scaffold, it then attracts the calcium needed to patch them.

Professor Kirkham says it could help people with early damage which could eventually lead to dental decay, or those who have tiny holes in their teeth which make consuming hot or cold food or drink painful.

The repair solution will not totally eliminate the need for the dentist’s drill as bigger cavities filled with decay would still have to be treated in the conventional manner.

It is hoped that trials will begin next year and a licence for wider use gained within five years.