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Deep sleep and memoryCurrent research (octber 2019) by Nina E. Fultz of Boston University and her colleagues states that during deep sleep, neuronal activity declines dramatically, with blood partially withdrawing from the brain. The cerebrospinal fluid then infiltrates and circulates in the form of pulsating and pulsating waves.
As for Laura Lewis of the Department of Psychiatry at Harvard Medical School says in this research, "We have known for some time that there are these electrical waves of activity in neurons. But until now, we did not know that there were also waves in the cerebrospinal fluid. "
The brain waves (Delta), the blood flow and the cerebrospinal fluid would indeed be perfectly coordinated in the phase of deep sleep.
Laura Lewis hopes this discovery will better understand a variety of neurological and psychological disorders that are often associated with sleep disorders, including Alzheimer's disease.
Indeed, the flow of cerebrospinal fluid and the neuronal activity of deep sleep (Delta waves) both help to eliminate from the brain the toxic beta-amyloid proteins that impair memory.
As people age, the brain during sleep generates fewer slow waves (Delta). This could affect the cerebral blood circulation and reduce the pulsations of the cerebrospinal fluid and would result in an accumulation of toxic proteins resulting in a decrease in memory capacity.
According to a study by Matthew Walker of the University of California (Berkeley) and his colleagues, there is a link between poor sleep and memory loss by toxic accumulation of beta-amyloid brain proteins that is characteristic of Alzheimer's disease.
Indeed, accumulations of beta-amyloid protein plaques are present in people with Alzheimer's disease and have also been observed in people with sleep disorders.
This research team investigated how the amount of beta-amyloid in the medial frontal lobe alters the stages of deep sleep (Delta) that are distinguished from the stages of light sleep (Alpha and Theta) and paradoxical sleep. Deep sleep is restorative and is necessary for the consolidation of the memory of facts.
Matthew Walker points out that studies have shown links between sleep deterioration and conditions such as Alzheimer's disease, heart disease, obesity, diabetes and stroke.
DECREASE IN DEEP SLEEP TIME LEADS TO INCREASED RISK OF DEMENTIAThe study by Professor Carole Planès of the UFR SMBH in Bobigny shows that the total duration of deep sleep over the entire night is always 100 minutes whether you are a short, medium or long sleeper.According to another study led by Associate Professor Matthew Pase of the Turner Institute for Brain and Mental Health in Melbourne (Australia), a reduction of just 1% in deep sleep per year in people over 60 was shown results in a 27% increase in the risk of dementia.Professor Pase also noted that "Slow wave sleep, or deep sleep, supports brain aging in several ways, and we know that sleep increases the elimination of metabolic waste from the brain, including facilitating the elimination of proteins that 'aggregate in Alzheimer's disease'.In other words, if your deep sleep time is reduced, this prevents the elimination of metabolic waste from the brain and thus allows Alzheimer's disease to take hold.
As for Laura Lewis of the Department of Psychiatry at Harvard Medical School says in this research, "We have known for some time that there are these electrical waves of activity in neurons. But until now, we did not know that there were also waves in the cerebrospinal fluid. "
The brain waves (Delta), the blood flow and the cerebrospinal fluid would indeed be perfectly coordinated in the phase of deep sleep.
Laura Lewis hopes this discovery will better understand a variety of neurological and psychological disorders that are often associated with sleep disorders, including Alzheimer's disease.
Indeed, the flow of cerebrospinal fluid and the neuronal activity of deep sleep (Delta waves) both help to eliminate from the brain the toxic beta-amyloid proteins that impair memory.
As people age, the brain during sleep generates fewer slow waves (Delta). This could affect the cerebral blood circulation and reduce the pulsations of the cerebrospinal fluid and would result in an accumulation of toxic proteins resulting in a decrease in memory capacity.
According to a study by Matthew Walker of the University of California (Berkeley) and his colleagues, there is a link between poor sleep and memory loss by toxic accumulation of beta-amyloid brain proteins that is characteristic of Alzheimer's disease.
Indeed, accumulations of beta-amyloid protein plaques are present in people with Alzheimer's disease and have also been observed in people with sleep disorders.
This research team investigated how the amount of beta-amyloid in the medial frontal lobe alters the stages of deep sleep (Delta) that are distinguished from the stages of light sleep (Alpha and Theta) and paradoxical sleep. Deep sleep is restorative and is necessary for the consolidation of the memory of facts.
Matthew Walker points out that studies have shown links between sleep deterioration and conditions such as Alzheimer's disease, heart disease, obesity, diabetes and stroke.DECREASE IN DEEP SLEEP TIME LEADS TO INCREASED RISK OF DEMENTIAThe study by Professor Carole Planès of the UFR SMBH in Bobigny shows that the total duration of deep sleep over the entire night is always 100 minutes whether you are a short, medium or long sleeper.According to another study led by Associate Professor Matthew Pase of the Turner Institute for Brain and Mental Health in Melbourne (Australia), a reduction of just 1% in deep sleep per year in people over 60 was shown results in a 27% increase in the risk of dementia.Professor Pase also noted that "Slow wave sleep, or deep sleep, supports brain aging in several ways, and we know that sleep increases the elimination of metabolic waste from the brain, including facilitating the elimination of proteins that 'aggregate in Alzheimer's disease'.In other words, if your deep sleep time is reduced, this prevents the elimination of metabolic waste from the brain and thus allows Alzheimer's disease to take hold.
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