First We Form Bad Habits
Then They Form Us
Dr. Rob Gilbert
SCREEN TIME: A REALLY BAD HABIT
While most activities can offer some health benefits, especially if they involve physical movement, social interaction or mental engagement, there are certain activities that are generally considered to have a minimal or negative health impact on your health. Spending too much time on electronic devices and screens is one of those “activities”.
Spending long periods on screens including TV, computers, tablets and smart phones can lead to negative health outcomes such as eye strain, poor posture, sleep disturbances reduced physical activity and, most importantly, changes to the brain, especially in young children and adolescents. Some of the effects on the brain are as follows:
1. Structural Changes: Studies using MRI scans have shown that excessive screen time, especially involving activities like playing video games or extensive use of social media, can be associated with changes in brain structure. For example, one study found that children who spend more time on screens tend to have thinner cortexes in areas related to critical thinking and reasoning.
2. White Matter Integrity: Research has indicated that high screen time can affect the integrity of white matter in the brain, which is crucial for communication between different brain regions. This can impact cognitive functions such as language, attention, and memory.
3. Dopamine System Alterations: Excessive screen time, especially with activities that provide constant stimulation (like video games or social media), can alter the brain's dopamine system. This system is involved in reward and pleasure, and its alteration can lead to addictive behaviors and changes in mood regulation.
4. Impact on the Prefrontal Cortex: The prefrontal cortex, responsible for decision-making, impulse control, and emotional regulation, may be affected by excessive screen use. Some studies suggest that high screen time can impair the development of this area, potentially leading to difficulties in controlling impulses and emotions.
5. Attention and Cognitive Function: High screen time has been linked to attention problems, such as decreased attention span and difficulty focusing. Some research suggests that children who spend more time on screens may be at a higher risk for developing attention-deficit/hyperactivity disorder (ADHD)-like symptoms.
6. Brain Connectivity: There's evidence that excessive screen use, particularly involving multitasking across multiple devices, can negatively affect the brain's connectivity patterns, potentially impairing cognitive flexibility and the ability to switch between tasks efficiently.
While these findings highlight potential risks, it's important to note that the extent and nature of these changes can vary depending on the type, duration, and context of screen use. More research is ongoing to fully understand the long-term impacts of screen time on the brain.
It is interesting that parents and grandparents get concerned about the use of a drug like marijuana on children but seem much less concerned about the effects of excessive screen time on a child’s mind. There are efforts being made by some to limit screen time for their children to 60 minutes per day. Meanwhile, the average American adult spends 7-10 hours/day on screens: TV (3-4 hrs/day) smart phones (3-4 hrs/day), computers/tablets (2-4 hrs/day). “Do as I say but do not do as I do” may not be the most effective role modeling.
Another important yet often overlooked way that screen time can affect the brain is through sleep disturbance. We all know how lack of sleep can affect how we function. Screen time, especially before bed, can significantly impact sleep in several ways:
1. Blue Light Exposure: Screens emit blue light, which can interfere with the production of melatonin, the hormone responsible for regulating sleep-wake cycles. Reduced melatonin levels can make it harder to fall asleep and decrease the quality of sleep.
2. Delayed Sleep Onset: Engaging in stimulating activities on screens, such as watching videos, playing games, or interacting on social media, can make it harder for the brain to wind down, leading to a delay in falling asleep.
3. Reduced Sleep Duration: Increased screen time, particularly in the evening, is associated with shorter sleep duration. People often lose track of time while using screens, leading to later bedtimes and less overall sleep.
4. Poor Sleep Quality: Excessive screen use, especially late at night, can lead to fragmented sleep, making it harder to enter deep, restorative stages of sleep. This can leave individuals feeling less rested and more fatigued during the day.
5. Increased Insomnia Risk: Studies have shown that high screen time is linked to a greater risk of insomnia. The mental stimulation from screen use, combined with the effects of blue light, can disrupt the natural sleep cycle, making it harder to fall and stay asleep.
6. Impact on Circadian Rhythm: The circadian rhythm, or the body’s internal clock, is sensitive to light cues. Screen use, particularly at night, can shift the circadian rhythm, leading to sleep disturbances and making it difficult to maintain a consistent sleep schedule.
So, if we’re spending too much time on our devices and we don’t sleep well, then we cannot adequately restore our body and mind. We all know the consequences of that; a lack of good quality sleep can significantly affect our:
1. Cognitive Functioning: Poor sleep impairs attention, concentration, and decision-making. It can lead to slower reaction times, reduced problem-solving skills, and difficulty in focusing on tasks.
2. Memory: Sleep plays a critical role in consolidating memories. Without adequate sleep, the brain struggles to process and store new information, leading to memory lapses.
3. Emotional Regulation: Sleep deprivation can lead to heightened emotional reactivity and reduced ability to manage stress. This can result in mood swings, irritability, and increased anxiety or depression.
4. Brain Health: Chronic sleep deprivation has been linked to long-term brain health issues, including an increased risk of neurodegenerative diseases like Alzheimer's. During sleep, the brain clears out toxins, and lack of sleep can disrupt this process.
5. Mental Clarity and Judgment: A tired brain is more prone to making errors in judgment and impulsive decisions. This can affect everything from daily tasks to more significant life choices.
6. Learning: The brain's ability to learn and retain new skills or information is impaired when sleep is insufficient or of poor quality. This affects both performance and the ability to acquire new skills.
In summary, good quality sleep is essential for maintaining cognitive functions, emotional balance, and overall brain health. So, if you find yourself experiencing memory problems, having difficulty learning new things, feeling anxious or irritable, feeling foggy or being impulsive, give some thought to how much screen time you are using and when you are using. Your screen time “habits” may be the source of many of your difficulties. If you are using screens, including TV, more than 6 hours/day, try cutting back by one hour to see whether you feel better without it.
Bad Habits Are Like a Comfortable Bed
Easy to Get Into but Hard to Get Out Of
Anonymous
