Sunday, December 28

Capgras Syndrome: When Dementia Misidentifies a Face

In Lewy body dementia and Alzheimer's, people can lose their ability to recognize faces. If this leads to a false belief, such as a person being an imposter, the diagnosis is Capgras Syndrome. It can be incredibly stressful for everyone involved. Learn the latest from Western University.

A new study from Western University provides researchers and clinicians with insight into a particularly debilitating memory problem that is present in some patients suffering from neurodegeneration caused by Lewy body dementia or Alzheimer's disease.

This disorder, known as Capgras Syndrome (or sometimes Misidentification Syndrome), is characterized by the delusional belief that a person with whom the patient shares a close emotional bond, typically the spouse, has been replaced by an imposter or look-alike.

In their study, Western researchers demonstrated that person recognition difficulties experienced by patients with Capgras Syndrome are not restricted to the person who is the target of their delusion, and can affect recognition of other well-known individuals, such as famous TV and sports personalities. For faces, such difficulties even extended to recognizing the intensity of emotional facial expressions. Interestingly, name recognition was spared, however.

The study, which was funded by the London and Middlesex Alzheimer Society, was led by Chris Fiacconi, a postdoctoral fellow at Western's Brain and Mind Institute, and his collaborators Stefan Köhler and Elizabeth Finger. The findings were published in the journal Frontiers in Human Neuroscience.

The disorder places an enormous burden on patient care in dementia, given that the imposter is usually also the primary caregiver.

"Very little is known about Capgras Syndrome," says Fiacconi. "Our results suggest that it arises as a consequence of a missing emotional response that normally accompanies recognition of close family members and other well-known individuals, when we see their faces or hear their voices," adds Fiacconi.

"This missing emotional response is likely the result of abnormal functioning in the autonomic nervous system. We are now examining this theory with psychophysiological recordings in the Köhler Memory Lab."

Read the full-length study for no charge at:
Nature and extent of person recognition impairments associated with Capgras syndrome in Lewy body dementia, Chris M. Fiacconi, Victoria Barkley, Elizabeth C. Finger, Nicole Carson, Devin Duke, R. Shayna Rosenbaum, Asaf Gilboa and Stefan Köhler, Frontiers in Human Neuroscience, doi: 10.3389/fnhum.2014.00726, published online 24 September 2014.

SOURCE:
  • Wetern University

1 comment :

  1. About a year and a half ago, I started having problems with facial recognition. Everyone, including my neurologist, is downplaying it or making lame excuses for it, but to me it's further proof that I am in the earliest stages of Alzheimer's, or possibly this Lewy body dementia...

    ReplyDelete

Your comments (up to 200 words):

The Guide


Free Ebook:
15 Simple Things You Can Do to Know You Are Trying Your Best for Parents with Dementia or Memory Loss

ALZHEIMER'S & DEMENTIA INFO

VIDEOS & ARTICLES

Care

Featured

Health

Science

Therapy

Treatment

Types




Diet & Nutrition

  1. Foods
  2. Coconut Oil
  3. Dairy
  4. Diets
  5. Fruit & Vegetables
  6. Herbs & Spices
  7. Medical Food (FDA)
  8. Mediterranean
    Diet
  9. Recipes
  10. Risky Foods
  11. Tips
  12. Vitamins &
    Supplements

 

AMAZON STORE

All About

Books

Electronics

Gifts

House

Meals

Movies