Can pinky time prevent dementia and Alzheimer's?

Could protecting your brain against dementia really be as straightforward as moving your little fingers for a few seconds every day?

That is the claim underpinning “pinky time”, a viral TikTok trend which says a basic finger exercise may reduce the likelihood of developing Alzheimer's.

Clips endorsing this alleged brain-health shortcut have received millions of views. Some even claim that being unable to complete the movement could indicate cognitive decline.

Supporters say that placing your fingers in a particular formation, then raising and lowering your pinkies, provides a brief mental exercise to help keep the brain alert.

Its appeal is easy to understand. The prospect of a free, undemanding everyday routine that guards against one of the most worrying conditions associated with ageing is compelling. Yet, although the trend is loosely rooted in genuine neuroscience, its claims go well beyond what the research can support.

Pinky time, coordination and brain health

Trying an unfamiliar, intricate finger task - such as mastering new guitar chords - genuinely requires focused attention. The brain must organise every action, suppress incorrect movements and continually adapt to the information received through sight and touch.

That is a considerable cognitive demand for such a small physical action. It may also explain why practical pastimes, including playing a musical instrument or knitting, are linked with stronger memory and improved brain function.

Scientists have long relied on finger-tapping exercises, in which participants repeatedly tap a finger or keep to a basic rhythm, to investigate links between movement, attention and the ageing brain. These exercises are research methods, however, and are not scientific diagnostic tests for dementia or memory loss.

A further principle is that the brain can reshape itself in response to the demands we place on it, creating fresh connections as we acquire new skills. Learning a new finger movement may therefore prompt the brain to reinforce and reorganise the neural pathways used for that movement.

Viewed this way, pinky time belongs to a wider group of activities that test the brain through coordination and novelty. Juggling, dancing and learning another language are among the activities that may support brain resilience as we grow older.

Why finger movements cannot diagnose dementia

An unfamiliar movement can certainly seem mentally challenging, but that does not make it a way to detect cognitive decline or prevent it.

Finger-coordination performance is shaped by numerous factors, such as flexibility, mobility, prior injuries and experience. Someone in good health might find this particular exercise difficult, whereas a person with cognitive impairment could complete it easily.

Searching for simple answers

The rise of pinky time reflects a growing desire for easy ways to check and safeguard brain health. In reality, identifying the earliest signs of cognitive decline is far more complicated.

Clinicians and researchers use rigorously designed assessments covering multiple areas of cognition: memory, attention, language and “executive functioning” - the abilities involved in planning, organising and self-control during everyday activities.

At present, no evidence shows that difficulty with this specific finger movement can predict early problems with memory or thinking. Nor is there strong evidence that regularly practising it prevents cognitive decline.

Studies of different hand and finger exercises have found small benefits for people who already experience some cognitive difficulties. However, the evidence remains limited, and it is uncertain whether any gains are substantial enough to provide protection against dementia.

There is another issue: the brain appears to gain most from activities that continue to be challenging. Once a task becomes familiar, it calls for less focus and mental effort. A movement that is tricky today may become mostly automatic with repetition, making it less useful as a mental workout.

What is known to help

Sadly, no individual trick can guarantee that the brain will remain sharp with age.

What seems important is a far wider range of habits: remaining physically active, caring for heart health, sleeping sufficiently and maintaining social connections. Evidence is also increasing that addressing hearing or vision problems can be beneficial, as doing so makes it easier to remain socially engaged and mentally active.

A nutritious diet - particularly one similar to the Mediterranean diet - is also associated with improved brain health. Continuing to learn throughout life, through education, hobbies, languages, music or other mentally stimulating pursuits, likewise appears beneficial.

As a coordination exercise, pinky time may be enjoyable and harmless. Its viral message, though, reduces a far more complicated issue to an overly simple claim.

For protecting the brain, the evidence still supports the less glamorous basics: exercise, sleep, a healthy diet, social connection, good sensory health and lifelong learning.

Monika McAtarsney-Kovacs, Postdoctoral Research Fellow in Cognitive Neuropsychology, Anglia Ruskin University

This article is republished from The Conversation under a Creative Commons licence. Read the original article.