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My mother died on 25th May.
As a small child, for three years I was sent to a Catholic convent school where I remember learning about five main things: guilt, hypocrisy, cruelty, purgatory and hell. It was mostly a dismal experience.
Last week, Richard Owens in The Times wrote about the remarkable and beautiful, elegant Italian Nobel-winning neurobiologist and recent centenarian, Rita Levi-Montalcino.
Scientists in the US have reported that mild cognitive impairment, like problems with memory and thinking which is known to be a transition stage before dementia, appears to affect older men more than it does older women.
Dementia is a general term for the loss of memory and thinking skills, when it is severe enough to prevent a person from doing normal everyday things such as taking care of themselves, going shopping, paying bills, washing, preparing meals.
The results came from one of the first studies conducted to determine the prevalence of mild cognitive impairment among participating men and women who had been randomly selected from a community.
A person is described as having cognitive impairment when they show problems with memory and thinking that is beyond what might be expected for their age and level of education. Although mild cognitive impairment appears to increase the risk of developing Alzheimer's Disease later, it is not a foregone conclusion.
Investigators interviewed, examined and administered cognitive tests to just over 2,000 people aged between 70 and 89, in Minnesota. They also interviewed people who knew the participants well, for example wives or husbands, about the participants' everyday cognitive functioning.
The participants were classed into three groups: normal cognitive functioning, mild impairment, or dementia.
The results showed that nearly 17 per cent of the group had mild cognitive impairment and that men were 1.6 times more likely to have mild cognitive impairment than women (regardless of the men's level of education or marital status).
The findings contrast with research that showed more women than men – or an equal proportion – have dementia. This could be due to a delayed progression to dementia in men, or women may develop dementia at a faster rate than men.
However, scientists caution that the results should be seen
in perspective, as the genetic risk factors involved in dementia are much
greater in magnitude.
Lifestyle factors are also important, and both men and women can reduce their risk of getting dementia. For example, maintaining an active lifestyle rich in mental, social and physical activity and adopting a "brain-healthy" diet that is low in fat and cholesterol and high in dark vegetables and fruit helps.
Image: NYTimes.com
Perhaps old age is a new beginning, maybe we can return to the magic tune of infancy, to that time before linear thought and prejudices when we perceived the universe with the exalted sense of the mad and were free to believe the unbelievable and to explore worlds that later, in the age of reason, vanished. I have very little to lose now, nothing to defend; could this be freedom at last? Isabel Allende (Thanks to www.persephonearbour.com)
The New York Times reported yesterday that neuroscience researchers in Brooklyn have recently been trying out a new drug called ZIP – which, when delivered to areas of the brain critical for holding specific types of memory, like emotional associations, spatial knowledge or motor skills, can actually erase memories by blocking the activity of PKMzeta – a substance that the brain apparently needs to retain much of its learned information. Critically, the report says that now it has been recognised, if enhanced, the substance could help ward off dementias and other memory problems.
So far, the research has only been carried out on animals, but with more than 100 million people worldwide predicted to have Alzheimer's disease or other dementias by 2050 as well as the far greater numbers who will struggle with age-related memory decline, the scientists' biggest target is to try to get cells to make more PKMzeta.
Unsurprisingly, many questions remain. For example, it is still not known if PKMzeta can really link a network of neurons for a lifetime, nor how, and they don't yet know how it works with the many other substances in the brain that appear to be important in creating a memory. As the article points out, no one expects there to be one, single memory molecule – the system is just not that simple. Many molecules will be found in different kinds of memories all along the process of learning, storage and retrieval.
Yet even at these early stages, scientists are upbeat about altering our understanding of human nature. Without doubt, they would be making a massive contribution to the ageing population if they can find some way to reverse the memory-degrading effects of
dementia.
Image: Photographersdirect.com
I'm not sure why, but if there's one dish that I will always associate with my mother, it is bread and butter pudding. She cooked lots a lovely things but good old-fashioned bread and butter pudding was a staple of our life at home. The joy of the crispy, bubbling, golden treat with its delicate vanillary sweetness that she brought to the family lunch table, will be one of my reminiscences of her motherliness for all time.