Can't Identify Famous Faces? Do You have Early Dementia?
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new study shows that individuals who suffer from primary progressive aphasia
(PPA), a dementia that commonly affects adults between the ages of 40 and 65,
have trouble identifying the faces of widely famous cultural icons.
photographs of famous people that may be able to identify early dementia in
people 40 to 65 years old. “People with this type of dementia consistently
forget names of famous people they once knew — it’s more than forgetting a
name or two of a famous person,” senior author Emily Rogalski, an
assistant research professor at the Cognitive Neurology and Alzheimer’s Disease
Center at the Northwestern University Feinberg School of Medicine in Chicago,
told USA
Today.
first group tested included 30 individuals who had previously been diagnosed
with PPA, while the second contained 27 healthy individuals to act as a control
group. The average age of the participants was 62.
were shown 20 black and white images of famous faces, ranging from leaders such
as John F. Kennedy, Bill Clinton, and Pope John Paul II to entertainers like
Lucille Ball, Sammy Davis Jr. and Elvis Presley. They were asked to give the
researchers the full name of the person in each picture. Partial credit was
given for recalling the first or last name. If no part of the name could be
recalled, participants were instead asked to offer a detailed description about
the famous subject.
researchers found that the healthy control group performed at a much higher
rate than those with PPA. 97 percent of the healthy group was able to recognize
or describe the famous figures, compared to 79 percent of the early-onset
dementia group. When it came to actually naming those in the photographs,
93 percent of the healthy individuals completed this task correctly, while only
46 percent of the participants with PPA were able to do so.
participant was also administered a MRI brain scan to map brain irregularities
linked to primary progressive aphasia. The brain scans revealed that those who
had difficulty with name recall were more likely to have experienced
brain-tissue loss in the left temporal lobe region of their brains, while those
with difficulties in face recognition had suffered brain loss on both sides of
the same region.
addition to its practical value in helping us identify people with early
dementia, this test also may help us understand how the brain works to remember
and retrieve its knowledge of words and objects,” said study author Tamar Gefen, MS, of Northwestern University Feinberg
School of Medicine in Chicago. “These tests also differentiate between
recognizing a face and actually naming it, which can help identify the specific
type of cognitive impairment a person has.”
neurology at the Washington University School of Medicine, in St. Louis, was
cautious when speaking of the findings to HealthDay.
“To help us know how to use this test as a screening tool,” Roe said,
“more research needs to be done to figure out whether this test
distinguishes all people with dementia from people without dementia or whether
it distinguishes only people with one particular type of early-onset dementia
from people without dementia.”
Source: http://anthonyssong.blogspot.com/2013/09/cant-identify-famous-faces-do-you-have.html
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