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HealthSpan

Can you measure cognitive health before you notice a problem?

Hands at a keyboard illustrating cognitive-health testing in Milton Keynes
Written by Prof Arul Ramasamy MA PhD MBA FRCS(Tr+Orth)Medically reviewed by Prof Arul RamasamyLast reviewed:

Cognitive assessment can help you understand how you perform on tasks involving attention, processing information and executive function, the skills you use to organise, prioritise and manage competing demands. At Hanbury Health, we consider those findings alongside your health, relevant blood results, sleep and stress to help identify useful next steps.

Perhaps you start the day feeling clear-headed, then find it harder to concentrate by mid-afternoon. You may reread the same paragraph, lose your train of thought between tasks or finish work feeling mentally drained.

These are everyday experiences worth understanding. HealthSpan's focus is on helping you function well: feeling more capable at work, having energy for family life and staying engaged in the things you enjoy.

The short version

  • Cognitive function includes attention, processing speed and the skills involved in planning and switching between tasks.
  • Testing provides structured information about selected aspects of your current performance.
  • Sleep, stress, medical history and relevant blood results help put that information in context.
  • The aim is to identify practical priorities and appropriate support.
  • Progress should include how you function in daily life, alongside any useful repeat assessment.

What is executive function, and why does it matter?

Executive function is a term for higher-order thinking skills that help you manage what you are doing. They include holding a goal in mind, choosing what deserves attention and adapting when the task changes.

You use these skills when organising a busy day, following a discussion while considering your response or returning to a piece of work after an interruption.

In daily life, the concern may sound less technical: “I used to find this easier” or “I can still do it, but it takes much more effort.” Those descriptions are useful starting points.

The aim of assessment is to make the conversation more specific. Which aspects feel difficult, when does that happen and what would you like to feel more comfortable doing?

What does a cognitive assessment involve?

Hanbury uses CNS Vital Signs, a computerised assessment with structured tasks. Its published validation includes tasks involving memory, attention, response control and shifting attention. These provide information relevant to selected aspects of cognitive performance.1

Depending on the task, you may respond to information on screen, remember material or change your response when the instructions change.

The findings give the consultant something to discuss alongside your experience. They can help distinguish the areas you find straightforward from those that deserve closer attention.

This is not an intelligence test or a judgement of your professional ability. A structured task samples a particular skill; your work and everyday life involve many skills, experience and circumstances together.

Can testing help explain an afternoon drop in focus?

It can contribute useful information, but understanding the pattern begins with your description of the day.

When does the drop happen? Do you feel sleepy, mentally overloaded or physically tired? Does it follow a poor night, a demanding morning or a particular routine? Is it something new or a familiar pattern?

A morning assessment records performance at that time. It does not directly measure what happens to you at three o'clock. Connecting the results with your history helps the consultant decide which possibilities need attention and whether further assessment would be useful.

You can prepare by noting a few examples over an ordinary week. Record when focus becomes harder, what you are doing and how it affects you. The aim is to describe the pattern clearly, without turning your day into another monitoring task.

Why look at sleep alongside cognitive performance?

Sleep is relevant to how you think and function during the day. The National Heart, Lung, and Blood Institute explains that sleep deficiency can affect attention, learning, decision-making and problem-solving. It can also leave you feeling tired and less effective at everyday tasks.2

That makes sleep a useful part of the assessment conversation. How regularly do you sleep? Do you wake feeling refreshed? Is sleep interrupted, or does your schedule leave too little opportunity for it?

Your answers help determine whether sleep deserves attention in the plan. A cognitive result cannot diagnose a sleep disorder, but the discussion may identify a reason for a more focused review.

The practical goal is to understand whether something about your sleep needs support, rather than assume that harder concentration simply comes with getting older.

How can stress fit into the picture?

Stress can involve poor focus, forgetfulness, tiredness and disrupted sleep. MedlinePlus describes these among the ways stress may affect daily life.3

That does not mean every concentration difficulty should be attributed to stress. It means your workload, responsibilities and experience deserve a place in the clinical conversation.

You may be managing demanding work while caring for children or parents. A plan needs to recognise those circumstances and explore what support or adjustments are realistic.

It can be useful to discuss what happens on quieter days as well as difficult ones. Your own observations help make the advice more relevant than a generic instruction to “reduce stress”.

What do blood tests add?

Blood results provide a different type of information from a cognitive task. They can contribute to the medical assessment, while the cognitive tasks describe aspects of how you perform.

At Hanbury Health, the consultant reads relevant results alongside your symptoms, medical history, medicines and routine. The question is whether there is a medical finding that deserves attention and how it fits with what you are experiencing.

The tests should follow the clinical question. An unexpected result may need clarification or further assessment before it explains anything about your focus.

Likewise, normal blood results do not make your experience unimportant. You may still benefit from discussing sleep, workload or another issue that a blood panel cannot fully capture.

Where does cortisol fit?

Cortisol is involved in the body's response to stress and other normal functions. Its level changes through the day and can be influenced by medicines, exercise and the circumstances of testing.4

When cortisol is relevant to a clinical question, the timing and interpretation of the measurement matter. A single morning result cannot establish why your concentration falls in the afternoon or quantify the stress you experience across a week.

The useful approach is to consider it with your history and other findings, deciding whether it adds information or needs further investigation. It should not become a target to push as low as possible.

This keeps the discussion focused on understanding your health and choosing an appropriate next step.

How do the findings become a practical plan?

The consultant brings the information back to the question you started with: what would help you function better in your own life?

Imagine someone who wants to finish the working day with enough mental energy to enjoy time with their family. Their assessment discussion could identify sleep as a priority, a medical result that needs attention or a daily routine worth reviewing. These are examples, not predictions of what an assessment will find.

The plan should explain what to address first, what support would help and how to review it. You should understand why each recommendation relates to your concern.

Sometimes the next step is further medical assessment. Sometimes it is a manageable change with a clear purpose. The result is a starting point for action, rather than another report to interpret yourself.

How can you tell whether things are improving?

Begin with the activities that brought you to the assessment. Is it easier to stay with a task? Are you less mentally drained at the end of the day? Do you feel more able to take part in conversations and family activities?

These observations can sit alongside repeat testing when there is a useful reason for it. CNS Vital Signs has been studied for repeat assessment, but a changed score still needs interpretation.1

Similar testing conditions help make comparisons useful. The consultant also considers whether the difference fits with what you notice outside the assessment.

The aim is better everyday functioning. A higher score is most meaningful when it contributes to understanding that wider picture.

Who might find this approach useful?

You may be broadly well but interested in understanding your current performance. You may also want help exploring an afternoon dip, mental fatigue or the feeling that demanding tasks take more effort than they used to.

You do not need to wait for a major problem to discuss those concerns. Equally, a persistent or worsening change affecting familiar activities deserves a clinical review.

HealthSpan's cognitive assessment is focused on current functioning. It is not a dementia-risk prediction service or a standalone diagnostic test.1

Explaining your concern when you enquire helps the team choose the appropriate starting point.

How can you arrange cognitive assessment in Milton Keynes?

Cognitive assessment is included within Hanbury's publishedHealthSpan packages. The HealthSpan page explains the options, prices and ongoing support.

Use Contact us to describe what you would like to understand. You can mention when focus becomes harder, relevant health concerns and any previous assessment.

The team can then help identify the appropriate route before an appointment is booked. You do not need to decide which individual tests you need before having that conversation.

Why Hanbury Health is different

HealthSpan brings cognitive performance into the same consultant-led review as relevant blood biomarkers, body composition and physical function. Your sleep, stress and daily routine help give those findings context.

For you, that means a conversation about how the information fits together and what could help you function better. The emphasis is on clear priorities, appropriate support and changes that matter at work, at home and in the life you want to keep enjoying.

Frequently asked questions

Can cognitive testing assess concentration and executive function?

Structured tasks can provide information about attention and selected skills relevant to executive function. The findings are interpreted alongside your experience, rather than treated as a complete measure of your ability.

Can an assessment explain why I lose focus in the afternoon?

It can help explore the question by combining your history with relevant assessment findings. A test performed in the morning does not directly measure the afternoon dip, so the timing and pattern you describe are important.

Why discuss sleep and stress?

Both can be relevant to daytime functioning. Understanding your circumstances helps the consultant identify priorities and decide whether further assessment or practical support would be useful.

Will blood tests identify the cause of brain fog?

They may contribute useful medical information, but there is no single blood test that explains every experience described as brain fog. The results need to be considered alongside your symptoms and wider history.

Is this a dementia-risk assessment?

No. HealthSpan's focus is your current cognitive functioning and the factors worth exploring to support it. Concerns requiring a different diagnostic assessment are directed appropriately.

How can I discuss cognitive assessment in Milton Keynes?

Contact the Hanbury team with your goals and the difficulties you notice. They can explain HealthSpan and help identify the right route before booking.

References

  1. Gualtieri CT, Johnson LG. Reliability and validity of a computerized neurocognitive test battery, CNS Vital Signs. Archives of Clinical Neuropsychology. 2006.
  2. National Heart, Lung, and Blood Institute. Sleep Deprivation and Deficiency: How Sleep Affects Your Health. NHLBI, National Institutes of Health. 2022.
  3. Berger FK; reviewed by Dugdale DC and the A.D.A.M. editorial team. Stress and your health. MedlinePlus Medical Encyclopedia. 2024.
  4. National Library of Medicine. Cortisol Test. MedlinePlus. 2024.

Understand what your cognitive results can tell you, and what needs a different assessment.

The Hanbury team can review your enquiry and help identify the appropriate next step before any appointment is booked.

About the author: Prof Arul Ramasamy is a consultant orthopaedic surgeon and a founder of Hanbury Health. He holds a PhD in bioengineering from Imperial College London, where he is a Visiting Professor, and is a Fellow of the Royal College of Surgeons (Trauma and Orthopaedics). He leads Hanbury's approach to recovery, performance and long-term health.

General information, not medical advice. Written by Prof Arul Ramasamy. Medically reviewed by Prof Arul Ramasamy MA PhD MBA FRCS(Tr+Orth). Last reviewed: 6 September 2026.

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