Developing an
increasingly warped sense of humor could be an early warning sign of impending
dementia - a new study has found.
Certain shifts in a person's sense of humor might be an
early warning sign of Alzheimer's disease, and may start to emerge years before
other symptoms, a new study suggests.
Laughing at "frankly inappropriate" moments,
taking jokes literally or missing the point, and preferring childish or
slapstick humor are some of the behaviors highlighted in the study, published
in the Journal of Alzheimer's Disease.
Researchers in London collected data on 48 patients with
Alzheimer's or other types of dementia, including frontotemporal lobar degenerations
(FTLD) and semantic dementia (SD), who were being treated at a cognitive
disorders clinic, along with 21 healthy people for comparison. They conducted
neuropsychological exams to assess the patients' cognitive function, along with
brain scans and other testing.
A relative, friend or caregiver who had known the person
well for at least 15 years was asked to fill out a questionnaire about their
sense of humor and how it had changed over the years. They were asked to rank
how much the person liked different types of comedy, both 15 years ago and
currently. The study grouped comedy styles into three broad categories:
farcical or slapstick (like the character Mr. Bean), absurdist (like Monty
Python), and satirical.
The questionnaire also asked, whether the patient ever
laughed at things other people did not find funny.
The study found dementia patients were significantly less
likely than the healthy group to enjoy satirical or absurdist humor, and more
likely to retain an enjoyment of slapstick. The patients' liking of satirical
or absurdist humor was found to decline an average of about nine years before
typical dementia symptoms set in.
Many patients also developed a distinctive habit of
laughing at "dark" or inappropriate things, the researchers said.
Comments made by the patients' caregivers highlight some of the troubling
changes they observed:
"Rarely laughs at jokes now except own, often inappropriately.
Jokes taken literally, misses the point."
"Used to be very witty but that has all gone; humor has to be more
obvious, laughs if others laugh."
"Has developed a dark and misplaced sense of humor; relishes other
people's mishaps or upset."
"Early on laughed very loudly at things that were only mildly
funny, flippant or 'over the top'; now laughs all the time at things that are
not particularly funny and will say 'I'm laughing and I'm not sure why I'm
laughing.' When I badly scalded myself the other year, thought it was
hilarious."
"Tends not to laugh as much at things previously thought funny ...
sometimes laughs inappropriately at news items."
“I have asthma – [they] laugh sometimes when I am fighting to get my
breath,”
Basically, humor had to become more obvious for the
people, and they stopped appreciating more sophisticated humor. Dirty and
inappropriate jokes became more popular.
The researchers note their findings were limited by the
fact that the study involved only a small number of people and relied on
caregivers' and control subjects' recollections from 15 years ago, which may be
subject to recall bias. They say more work is needed to understand "humor
behavior and its potential as a disease biomarker," perhaps by studying
people over a longer period of time before dementia cases develop.
They also suggest that a better understanding what
dementia does to a person's sense of humor could help improve social
functioning and quality of life for patients and their caregivers. "We
hope that our findings will stimulate interest in humor as an engaging,
ecologically relevant and informative index of social functioning in
neurodegenerative disease," they write.
Dr. Simon Ridley, of Alzheimer’s Research UK, said
relatives concerned about changes in the behavior of their loved ones should
contact their physician.
“While memory loss is often the first thing that springs
to mind when we hear the word dementia, this study highlights the importance of
looking at the myriad different symptoms that impact on daily life and
relationships,” he continued. “A deeper understanding of the full range of
dementia symptoms will increase our ability to make a timely and accurate
diagnosis.”
Sources and
Additional Information:
http://www.morningticker.com/2015/11/a-dark-sense-of-humor-could-mean-youre-going-to-get-alzheimers/
