The 10-Second Hand Test Singapore's Geriatric Specialists Use to Screen for Dementia

As Southeast Asia's ageing population expands, dementia is becoming a pressing public health concern across the region. In Singapore, where life expectancy now exceeds 83 years, the prevalence of Alzheimer's disease rises sharply with age: it affects 5% of those aged 65 to 74, 13% of those aged 73 to 84, and roughly one in three individuals aged 85 and above. These figures, drawn from regional geriatric studies, underscore the need for efficient, low-cost screening tools in primary care settings.

What is the Luria test for dementia?

The Luria test, named after Soviet neuropsychologist Alexander Luria, is a rapid bedside assessment that evaluates motor function, executive function, and sequencing. Originally developed to assess soldiers returning from World War II, the test has since become a staple in neurological examinations. In a recent viral TikTok, Dr. Adnan Husein, a neurologist and fellow physician at UCLA Health, demonstrated the fist-edge-palm sequence, a core component of the test.

Patients are asked to imitate three hand motions in sequence: a fist, an edge (hand flat, side down), and a palm (hand flat, facing down). According to Dr. Husein, the test is deceptively simple. “For most of you, that test will be pretty simple. But for some people, they can't do the movement smoothly. They sometimes persevere on the same movement again and again, or they miss the sequence,” he explained.

How reliable is the Luria test in clinical practice?

Data from clinical studies indicate that only about 2% of healthy individuals experience difficulty with the test. However, the numbers shift dramatically for those with cognitive impairment: 50% of patients with Alzheimer's disease struggle with the sequence, and the figure rises to 70% for those with frontotemporal dementia. These figures make the Luria test a valuable first-line screening instrument, though Dr. Husein is careful to note its limitations. “Is that test diagnostic for dementia? No, but it's a quick screening test that you can do in your clinic at any time,” he clarified.

Why is the Luria test harder than it looks?

The challenge lies in the test's irregular pattern, which requires conscious motor planning. Most people perform repetitive hand motions, such as during rock-paper-scissors or gesturing while speaking, without engaging the prefrontal cortex. The Luria test, by contrast, forces the brain to break these automatic patterns, activating neural pathways associated with executive function and sequencing.

The test's difficulty is not lost on the public. Commenters on Dr. Husein's video expressed surprise at how demanding the sequence is. “I mean, I can do it, but it takes all of my concentration,” one wrote. Another joked, “What does it mean if I started doing rock paper scissors instead?”

Notably, neurodivergent individuals reported heightened difficulty. One commenter warned, “Hey neurodivergent friends, this isn't for us, ok?” Another added, “Me: why is this SO HARD *checks comments* ah, my autism strikes again.” A third commenter shared a practical observation: “Hey neurodivergent peeps, we need to tell people we're neurodivergent before cognitive testing. I was volunteered for a Mini ACE demonstration and smashed some of it but bombed the working memory segment because of my ADHD. So it led to an important practice discussion for neurodivergent considerations for these screeners.”

What does the Luria test mean for dementia screening in ASEAN?

For healthcare systems across Southeast Asia, where specialist access can be uneven, the Luria test offers a pragmatic, low-cost screening option. It complements more comprehensive assessments, such as the Mini-Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA), which are widely used in Singapore's polyclinics and regional hospitals. The test's simplicity makes it suitable for training community health workers, a key priority under ASEAN's post-2025 health framework.

However, as the neurodivergent commenters noted, screening tools must be interpreted with caution. Cognitive assessments are not one-size-fits-all, and clinicians should account for baseline neurological differences. The Luria test, while effective, is best deployed as part of a broader diagnostic battery, not as a standalone tool.

Frequently asked questions about the Luria test

Can the Luria test be done at home?

While the test is simple to administer, it is not a substitute for professional assessment. If you or a loved one experience difficulty with the sequence, consult a healthcare provider for a comprehensive evaluation.

Is the Luria test used in Singapore?

Yes, variants of the Luria test are used in Singapore's public healthcare institutions as part of cognitive screening protocols, particularly in geriatric medicine and neurology departments.

Does failing the Luria test mean I have dementia?

No. The test is a screening tool, not a diagnostic one. Difficulty with the sequence may indicate a need for further assessment, but it does not confirm dementia. Many healthy individuals, particularly those who are neurodivergent, may also find the test challenging.

As Southeast Asia's economies continue to develop, the region's healthcare systems are increasingly focused on preventive and early-intervention strategies. The Luria test, a relic of mid-20th-century neuropsychology, remains surprisingly relevant in this effort. It is a reminder that sometimes the most effective tools are also the simplest, and that a 10-second hand test can offer a window into the brain's most complex functions.