Our sleep is much more than a time of rest. While we sleep, the brain activates essential systems for clearing toxins, processing memories, and maintaining proper cognitive function. Therefore, when sleep patterns change significantly, it is sometimes not just temporary fatigue, but an early signal of something deeper.
Neurology and sleep experts warn that certain sleep disorders may be among the first signs of neurodegenerative processes in the brain, sometimes even before clear memory problems appear. The connection between sleep and brain health has become increasingly clear in recent years, and studies show that chronic disruptions in sleep structure, especially deep sleep and REM sleep, are linked to an increased risk of dementia.
During sleep, the brain’s glymphatic drainage system works to remove waste and toxic proteins, including beta-amyloid, one of the proteins that accumulates in the brain in the process of dementia and Alzheimer’s disease. When sleep is disrupted over time, the brain’s ability to carry out this cleaning process decreases, which may accelerate cognitive decline.
In addition, deep sleep stages and dream sleep are essential for stabilizing new memories, processing emotional information, and properly retrieving information. Therefore, prolonged sleep disturbances may also affect memory, attention, and daily functioning.
So which sleep problems should raise a red flag?
1. Severe and sudden insomnia
Difficulty falling asleep happens to all of us from time to time, especially during stressful periods. But when there is a new onset of severe insomnia, with frequent awakenings, difficulty falling back asleep, and significant daytime fatigue, it is worth paying attention.Neurologists explain that in the early stages of Alzheimer’s disease, the brain areas that regulate the sleep-wake cycle begin to be affected. The result can be significant difficulty falling asleep, fragmented sleep, and daytime sleepiness.
When insomnia is also accompanied by mood changes, memory decline, or confusion, it is especially important to seek evaluation.
2. Falling asleep at unusual hours
Our biological clock is responsible for synchronizing light, darkness, alertness, and sleep. When this mechanism is impaired, people may start sleeping more during the day and staying awake at night.This is one of the more common changes in early stages of dementia, especially when it is accompanied by confusion or restlessness in the evening, a phenomenon also known as “sundowning”.
In such a state, the person may wake up repeatedly at night, become confused about the time or place, and struggle to fall back asleep.
3. Abnormal movement during dreaming
If a person shouts in their sleep, kicks, waves their hands, or even gets out of bed while dreaming, it may be a REM sleep behavior disorder.This is a disorder in which the body does not remain paralyzed during dreaming, so the person physically “acts out” the dream. Experts note that this may be an especially early warning sign of dementia with Lewy bodies or Parkinson’s disease, sometimes years before memory symptoms appear.
In many cases, partners are the first to notice the phenomenon, especially when there are sudden movements, hitting, or jumping out of bed.
4. Night wandering
Getting out of bed and walking around the house at night, sometimes with confusion and disorientation, is another phenomenon that may be linked to cognitive decline.Beyond the risk of falling, this also represents a significant disruption of the sleep cycle, which prevents the brain from carrying out its nighttime repair and cleansing processes.
When wandering is accompanied by restlessness, pain, confusion, or difficulty returning to bed, it is important to take it seriously.
Not every sleep problem is dementia
It is important to emphasize: Sleep disturbances alone do not necessarily mean dementia. There are many causes of sleep problems, including stress, depression, anxiety, medications, sleep apnea, and even nutritional deficiencies.
However, when there is a new, persistent change, or one accompanied by memory decline, difficulty in daily functioning, or behavioral changes, it is recommended to consult a neurologist or a sleep specialist.
The encouraging news is that early identification of such changes can help with faster diagnosis, treatment adjustment, and sometimes even slowing cognitive decline.
Ultimately, the brain speaks to us through sleep as well. The question is whether we know how to listen.
Source:
www.jpost.com
