German neuroscientist Manfred Spitzer coined the term digital dementia to describe cognitive decline that some researchers believe results from overreliance on digital devices such as smartphones, search engines, and GPS navigation. The premise behind digital dementia is that the brain gets less exercise in the areas responsible for memory, attention, and problem-solving when mental tasks, such as remembering phone numbers, navigating routes, and recalling facts, are outsourced to technology.
It is important to know that digital dementia isn’t a formal medical diagnosis. It is a descriptive label for a pattern of cognitive symptoms that some researchers connect to excessive screen use, particularly in young adults and adolescents whose brains are still developing.
The main worry behind digital dementia is neuroplasticity, which is the brain’s ability to physically reshape itself based on what you frequently do or don’t do. Neuroimaging studies have shown that heavy smartphone use can reduce gray matter in brain regions responsible for cognitive processing and emotional regulation. Gray matter is the tissue where the brain does most of its thinking, planning, and feeling.
People who report digital dementia symptoms usually describe a cluster of cognitive and emotional changes, including:
- Memory problems
- Reduced empathy and social skills
- Shortened attention span
- Emotional instability
- Declining performance
Research on touchscreen users has illustrated how fast the brain adapts to digital habits. Studies have found that people who frequently use touchscreens developed measurably larger cortical representations of their thumbs and fingertips, which means their brains devoted more processing power to the physical act of swiping. These changes are linked directly to how much a person uses their device. The brain was found to be optimizing itself around phone use.
What has become worrisome is that some of these brain changes appear to be long-lasting. Research on neuroplasticity and digital media found that intensive use can create unique functional representations of digital objects that persist for decades. The brain doesn’t just temporarily adjust; it rewires itself in durable ways.
For children and adolescents, early exposure to fast-paced media, such as short-form social media videos, has been linked to impaired motor skills, weaker spatial awareness, and slower language development. The effects of this appear to be more noticeable in younger people because their brains are still building the neural pathways that support executive function, the ability to plan, reason, and control impulses.
The opposite may be true among older adults. A major study published in Nature Human Behaviour examined technology use among people over the age of 50 and found no supportive evidence for the digital dementia hypothesis. In fact, the results went in the opposite direction, as regular use of computers, smartphones, and the internet was associated with lower rates of cognitive decline. The researchers suggested that technology use may build a kind of “technological reserve” that helps protect the brain and that its positive effect on cognitive function was comparable to that of physical activity.
Game-based digital training programs have been shown to improve cognition in older adults by increasing activity in the frontal lobe, the region of the brain most responsible for planning, decision-making, and focus.
Technology itself isn’t fundamentally harmful to the brain. The risk appears to stem from passive, constant, and mindless use that displaces the kinds of mental effort the brain needs to function optimally.
The encouraging news is that attention and memory problems linked to heavy digital device use appear to be reversible. A study from Georgetown University asked 500 participants to cut their internet access on their phones for two weeks. After those two weeks, participants could sustain their attention for measurably longer. Researchers noted that even a moderate decrease in the constant stimulation from phones, social media, and games was enough to help people reclaim their natural ability to focus. This finding is significant because it suggests that the cognitive effects of screen overuse aren’t permanent damage; it is just the mental equivalent of being out of shape.
If you recognize any of these symptoms of digital dementia, there are ways to protect your cognitive health:
- Start by identifying tasks you have fully outsourced to a digital device, such as memorizing phone numbers, using GPS, etc. Instead, read physical books, do mental math, and handwrite notes
- Take short breaks, as reducing passive scrolling, turning off non-essential notifications, and building screen-free windows into your day can be enough to give your attention system room to recover.
- For children and adolescents, limit fast-paced media, encourage hands-on play that builds spatial and motor skills, and make sure screen time doesn’t overtake face-to-face social interactions
If you or a loved one is experiencing symptoms of digital dementia, you can receive treatment at Flushing Hospital Medical Center’s Ambulatory Care Center. To schedule an appointment, please call (718) 670-5486.
All content of this newsletter is intended for general information purposes only and is not intended or implied to be a substitute for professional medical advice, diagnosis or treatment. Please consult a medical professional before adopting any of the suggestions on this page. You must never disregard professional medical advice or delay seeking medical treatment based upon any content of this newsletter. PROMPTLY CONSULT YOUR PHYSICIAN OR CALL 911 IF YOU BELIEVE YOU HAVE A MEDICAL EMERGENCY.