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Brain Reserve and the 'Use It or Lose It' Principle in Dementia: A Practical Guide for Caregivers

Brain reserve is your loved one's brain's ability to keep working well even as cells are damaged by dementia. Think of it as a backup system of extra connections and pathways built over a lifetime. The 'use it or lose it' principle means that staying mentally, socially, and physically active can help build and maintain this reserve, potentially delaying symptoms and improving quality of life. While dementia is progressive, there are concrete, everyday things you can do to support your person's brain health and help them function better for longer. This guide gives you real words to say and exact steps to take.

Key points

  • Brain reserve is built over a lifetime through learning, socializing, and mental activity. It acts as a backup system that helps the brain compensate for damage caused by dementia.
  • The 'use it or lose it' principle means that engaging in meaningful, enjoyable activities can help maintain and strengthen brain connections, potentially delaying symptom progression.
  • Everyday activities like folding laundry, listening to music, or looking at photos can support brain health—no expensive brain games needed.
  • Avoid quizzing, correcting, or rushing the person. These actions drain cognitive reserve and cause distress.
  • Use simple, one-step instructions, give extra time to respond, and stop activities while the person is still enjoying them.
  • Care for your own brain health too—your well-being directly affects your ability to support your loved one.

What Is Brain Reserve?

Brain reserve is your brain's ability to cope with damage and keep functioning. Imagine a city with many roads. If one road is closed due to construction, traffic can still flow because there are alternate routes. Similarly, a brain with high reserve has built many extra connections (like extra roads) over a lifetime through learning, socializing, and mentally stimulating activities. When dementia damages cells and closes some pathways, the brain can reroute information along these backup connections. This is why two people with the same amount of brain damage can have very different symptoms: the one with higher reserve may appear much less affected because their brain is compensating. As one expert explains, 'We can build cognitive reserve, meaning that even though the cells in our brain are dying, outwardly we're doing pretty well. We're compensating because we've built up so many highways, so many neuro connections that when one is closed down, they find another one to get to' (source 2).

How Does 'Use It or Lose It' Apply?

The 'use it or lose it' principle is about actively maintaining and strengthening those brain connections. Just like a muscle that weakens without exercise, brain connections can become less efficient if not used. For a person living with dementia, every day is work. As Teepa Snow describes, 'A person living with dementia is working… they are using their cognitive reserves to present as well as possible, to function as well as possible, to motivate, to try to feed themselves or do whatever they can to get through that day' (source 4). This means that engaging in meaningful, enjoyable activities—even simple ones—can help keep those pathways active. It's not about forcing 'brain games' or hard puzzles; it's about providing opportunities for the person to use their remaining skills in a supportive, low-pressure way. For example, helping with a familiar task like folding laundry or sorting photos uses memory, motor skills, and social connection, all of which support brain health.

Why Resilience Is Possible Even With Mixed Dementia

Mixed dementia (e.g., Alzheimer's combined with vascular dementia) can seem overwhelming, but many people show remarkable strength and adaptability. This resilience isn't about curing the disease, but about finding ways to live well despite it. Cognitive reserve can help delay the progression of symptoms and allow individuals to hold onto their memory and reasoning skills longer (source 1). The key is to focus on what the person can still do, not what they've lost. By providing the right support and reducing stress, you help them conserve their cognitive reserve for the things that matter most, like connecting with you and maintaining a sense of purpose.

General caregiving information, not medical advice. Check medications and major care changes with your clinician.

Practical tools

  • Activity reminders

    Set up a simple daily schedule with visual cues or alarms to prompt engagement in mental, social, or physical tasks.

  • Adaptive exercise equipment

    Use items like resistance bands, light hand weights, or a sturdy chair for safe seated exercises.

  • Social connection aids

    Use phone, video call apps, or scheduled group activities to maintain regular contact with friends or family.

Discuss with your clinician

Ask your doctor: 'Given my loved one's specific type of dementia (e.g., Alzheimer's, vascular, Lewy body), are there any activities or exercises that are particularly recommended or that we should avoid?'

Discuss: 'My loved one seems to have good days and bad days. Is there a way to measure their cognitive reserve or track changes over time that could help us adjust our approach?'

Ask: 'Are there any medications or supplements that might support brain health or cognitive reserve for their specific condition? I want to make sure we are not missing anything that could help.'

Inquire: 'My loved one has hearing/vision loss. Could treating that more aggressively help with their cognitive function? Should we see a specialist?'

Discuss: 'I am feeling overwhelmed. Are there any local programs, support groups, or respite care options that could help me maintain my own brain health and reduce stress?'

Related guides

Sources