Distractions 'hit old-age memory'
Mental slowing down in old age can be blamed partly on being more easily distracted, research suggests.
The Canadian team asked young and old people to attempt a memory test while in a scanner showing which bits of their brain were working.
The older subjects did worse at the tests, and their brains responded more to the background buzzing and banging from the scanner itself.
Other researchers have suggested that mental decline may be due to a decreasing ability to "tune out" irrelevant information from their senses.
This has been shown for both sound and vision, where older subjects were more likely to focus on the landscape in a picture rather than the figure within it.
However, when the older subjects failed, there was also increased activity in two other parts of the brain, the auditory cortex and the pre-frontal cortex, which are responsible for processing signals from the external environment.
Dale Stevens, who led the study, said that that brains of the older people were processing too much unnecessary information - in this case the normal knocking and rattling sounds that an MRI machine produces.
"The old brains showed increased activation in certain regions that should normally be quieter or turned down."
He said that the poorer performance overall of the older people might be due to an inability to "tune out" this noise while their brains were trying to form new memories of the faces.
CTs of ADHD brains show decreased activity in the brain centers critical to concentration and goal-directed activities
uncontrolled movements, verbal tics (e.g., Tourette's syndrome), weight loss, fast/pounding/irregular heartbeat, chest pain, mental/mood changes, difficulty urinating, signs of infection, easy bruising/bleeding.
Of course you know not to confuse correlations among data points on 3D computer graphics with any actual medical insight, but it's baffling to me that identical scans with identical symptoms should lead to different diagnoses depending on age of patients!
Despite the designation "mild," even a single concussion can produce serious symptoms [....]"The spouses say, 'He is totally different--he used to be a quiet guy and now he's agitated,' or 'He used to be energetic and now has no motivation,'" [....] "They can also lose the ability to put everything together and to make good judgments."
"ahem ... i see ... yes, yes ..." , and have no idea what the other person talked about . the interesting thing is , that the other person seems just happy to have had sometime who "lend an ear' - they often don't want an answer at all .
3 feet of 'flexible mohair' to cure the most obstinate cases??
Scientists are suggesting that cannabis can offer some benefit for Alzheimer's sufferers. The scientists from Israel and Spain say cannabis-based treatments could improve memory loss in Alzheimer's sufferers.
The revelation was made this week at a symposium of cannabis experts hosted by the Royal Pharmaceutical Society of Great Britain (RPSGB) where the scientists said that a compound present in cannabis significantly slows memory problems caused by the disease.
Ten years ago the RPSGB launched its protocols to demonstrate the therapeutic effectiveness of cannabis which led to Government-funded trials in Britain to explore the benefits for patients with multiple sclerosis and in the treatment of severe pain.
Cannabis-derived medicines have subsequently entered the market and are currently available to patients in Canada.
The claim follows successful tests in mice and the scientists are now calling for funding for trials to be conducted in humans.