Rapid Eye Movement (REM) sleep, a duration in that we knowledge clear dreams, was detected by scientists in a 1950s. Because REM nap is compared with dreaming, on a one hand, and eye movement, on a other, it has been tantalizing to assume that any transformation of a eye is compared with a specific dream image. But notwithstanding decades of heated investigate by heading general scientists, this discerning supposition has remained unproven.
A new investigate formed on singular neuronal information offers a initial systematic justification of a couple between fast eye movement, dream images, and accelerated mind activity. When we pierce a eyes in REM sleep, according to a study, specific mind regions uncover remarkable surges of activity that resemble a settlement that occurs when we are introduced to a new picture — suggesting that eye movements during REM nap are obliged for resetting a dream “snapshots.”
The research, published this week in Nature Communications, was led by Dr. Yuval Nir ofTel Aviv University’s Sackler Faculty of Medicine in partnership with TAU’s Prof. Itzhak Fried, also of UCLA and Tel Aviv Medical Center; Thomas Andrillon of a Laboratoire de Sciences Cognitives et Psycholinguistique in Paris; and Dr. Giulio Tononi and Dr. Chiara Cirelli of a University of Wisconsin-Madison.
Deep down in a brain
“Our idea was to inspect what happens low in a tellurian mind during REM sleep, privately when fast eye movements occur,” pronounced Dr. Nir. “Prof. Fried’s trailblazing investigate with epilepsy patients during UCLA offering a singular event to collect a compulsory information — a activity of neurons located low inside a tellurian brain.”
The investigate for a investigate was conducted on 19 epileptic patients during a UCLA Medical Center, who compulsory invasive monitoring of mind activity before to intensity surgical excision of seizure-causing areas of a brain. Electrodes were ingrained low inside a patients’ smarts to guard their mind activity over a march of 10 days. These electrodes were means to yield a singular information indispensable to infer a couple between eye movements, dream imagery, and mind activity.
“We focused on a electrical activities of particular neurons in a middle temporal lobe, a set of mind regions that offer as a overpass between visible approval and memories,” pronounced Dr. Nir. “Prof. Fried’s before investigate had shown that neurons in these regions turn active shortly after we perspective cinema of famous people and places, such as Jennifer Aniston or a Eiffel Tower — even when we tighten a eyes and suppose these concepts.”
In further to monitoring a patients’ mind activity around intracranial electrodes, a researchers also available scalp EEG, flesh tone, and eye movements to brand durations of REM nap and detect a accurate impulse of any fast eye movement.
Images, watchful and asleep
“The electrical mind activity during fast eye movements in nap were rarely identical to those occurring when people were presented with new images,” pronounced Dr. Nir. “Many neurons — including those in a hippocampus — showed a remarkable detonate of activity shortly after eye movements in sleep, typically celebrated when these cells are ‘busy’ estimate new images.”
“The investigate commentary advise that fast eye movements paint a impulse a mind encounters a new picture in a dream, identical to a mind activity exhibited when one encounters visible images while awake,” Prof. Fried said.
“How and because eye movements start are important,” pronounced Dr. Nir. “And these moments paint absolved windows of event for a investigate of mind activity.”