Our Wellington network
Best Practice Resources
In general practice
Professional development education
Regional Health Pathways
Dementia friendly general practice
Person-centered hospital care
Dementia friendly hospital design
In residential care
Person-centered residential care
Dementia friendly residential care design
Sexuality in residential care
In community services
In research, advocacy, and policy
Relevant NZ organisations
Support around diagnosis
Importance of early diagnosis
Support after diagnosis
Advance care planning
Supporting advanced dementia and end of life
People living with advanced dementia
Palliative care and end of life
Supporting cultural diversity
Supporting culturally and linguistically diverse people
Supporting diverse needs
Gender and sexual minorities
NZ Research Radar
Numbers and trends
Prevalence and economic impact
Awareness and attitudes
Workforce and services
Cognitive and brain changes
Prevention, risks, and causes
Assessment and diagnosis
Driving and capacity
Experience and challenges
Living with dementia
Health challenges in dementia
Death and dying with dementia
Support and supporters
Interventions and activities
Professional care and staff training
All Guest Blogs
March: Healthy weight
July: Social connection
April brain health tip: Depression
Research shows that brain health is promoted by promoted by getting good treatment if we become depressed.
Depression and dementia
The links between depression and dementia are complex. People who have had an episode of depression anytime from mid-life onwards have a higher risk of developing a dementia illness in later life, and this association becomes stronger when studies examine this link for depression occurring in old age.
However, depression can be an early symptom of a dementia illness before it is diagnosed, which may explain at least some of this association.
Of course, depression and its ‘evil twins’, high stress levels and high anxiety, are all harmful and painful for us whenever they occur in our lives. Even if there was no link with dementia, we would want to avoid travelling through such a period, or to limit how severe and prolonged any depression was.
It is known that the body’s stress responses which occur as part of depression for some people are able to cause damage to brain areas important in some common dementia illnesses, such as prolonged over or under-activity of the cortisol system.
Research has also shown that some antidepressant medications reduce the chemical changes of Alzheimers disease in test tube and animal experiments. These are all very encouraging pieces of information.
One way of thinking about depression and its treatment is that althoungh there are many paths into depression, there are also many paths out.
Biological changes can take us into the pit of depression, such as side effects of medications and hormonal imbalances for example, but biological treatments can help us climb out again, such as antidepressant medication and restoring healthy exercise.
Psychological influences can take us down, such as negative patterns of thinking that we developed in childhood becoming activated in adult life, but psychological treatment can bring us up, such as counselling and psychotherapy.
Social factors can push our mood into depression, such as bereavement, loneliness, and unemployment, but positive social connectedness can lift out mood back to normal, such as re-establishing connections with friends and family.
Spiritual influences can lead to despair, such as losing our faith or finding ourselves questioning our purpose in life, but they can also bring us back into the light, such as joining with a faith community or finding new meaning for our lives..
It is worth getting help
The key is that if we become depressed, stressed, or anxious to the extent that it significantly interferes with our ability to carry out our normal lives for weeks at a time (or causes serious risks or major suffering), then we should seek help from a health professional that we trust to discuss options to help us recover. The worse the depression, the more we should look at biological, psychological, social, and spiritual solutions that could help us - and if the plan we make doesn’t work, we should seek more advice and change strategy.
For those of us that live with a degree of depression, high stress, or anxiety most of the time, the issues are to learn how to minimise the symptoms, avoid major crises, and get by as best we can. This is a specialist area, just like managing life-long arthritis requires specialist help.
For people already living with dementia who develop depression, stress, or anxiety, there is no strong evidence at the moment that treating these problems will alter the course of the dementia illness for the better (but it might!). However, why would we want someone to carry the burden of dementia and a burden of depression, stress, or anxiety? We wouldn’t! Depression and its ‘evil twins’ can be treated in the context of dementia just as they can for those of us who do not have a dementia. It can be more difficult to treat but that just requires more imagination and persistence on our part.