Poor sleep is characterized by difficulty falling asleep, light sleep, frequent awakenings during the night, or not getting enough 7-8 hours of sleep per night. Common signs of poor sleep quality include difficulty concentrating during the day, mental fatigue, headaches or dizziness, digestive issues, and mood changes. If this condition persists, it can directly affect memory and cognitive abilities.

Impaired memory consolidation

Adults need about 7-9 hours of sleep each night, while children require more time for energy restoration. One or two nights of insufficient sleep usually do not have a noticeable impact, but prolonged sleep loss can severely affect the brain, impairing memory function. This is because sleep plays a crucial role in transferring information from short-term memory in the hippocampus to long-term memory stored in the cerebral cortex, which helps consolidate memories. When sleep is inadequate, this process is disrupted.

Reduced learning effectiveness

Insufficient sleep negatively impacts the three stages of the learning process: acquisition, consolidation, and recall. Not getting enough sleep reduces the ability to focus on new information, interrupting the formation of memories. As a result, the brain struggles to retrieve and synthesize information, thereby affecting learning outcomes.

Increased risk of memory-related diseases

Getting too little sleep can significantly increase the risk of memory function decline and Alzheimer's disease, a neurodegenerative disorder that causes memory loss and cognitive impairment. Prolonged sleep deprivation prevents amyloid beta proteins, factors associated with Alzheimer's disease, from being effectively cleared, leading to their accumulation over time and causing damage to brain cells. Poor sleep quality also raises the risk of mental health problems such as chronic stress and depression. Beyond its effects on the brain, sleep loss is a contributing factor to many chronic diseases, including cardiovascular disease, diabetes, and stroke.

All stages of sleep are vital for memory. Sleep consists of two main phases: non-rapid eye movement (nREM) sleep and rapid eye movement (REM) sleep, both of which are involved in processing and storing memories.

To improve sleep quality and cycles, individuals should limit caffeine, alcohol, tobacco, and other substances that interfere with sleep. It is advisable to maintain a comfortable sleep environment with appropriate temperature, dim lighting, and a quiet space. Regular exercise, stress management, and practicing relaxation techniques also contribute to better sleep.

Anh Chi, from Very Well Health