Dementia is a progressive illness that has
preoccupied philosophers and physicians for many centuries, yet there's still
no known cure and it continues to afflict an increasing number of people
in Portugal and around the globe.
The World Health Organization (WHO) defines
dementia as a syndrome in which there is deterioration in memory, thinking,
behaviour and the ability to perform everyday activities.
About 50 million people in the world have dementia
and there are as many as 10 million new cases expected each year. Although it mostly
involves the elderly, dementia is not an inevitable part of growing old.
The effect of aging on human cognitive processes
was the subject of
much philosophical deliberation in ancient Greek and Roman times. It was
studied by Pythagoras in the 6th century BC and by
Hippocrates, the “father of medicine”, who lived between the 4th and 3rd
centuries BC. Plato and Aristotle both had profound but often conflicting views
on the aging process and cognitive decline, though Plato carried on writing up
to the grand old age of 80 and Aristotle to around 62 in an era when life
expectancy was about 30.
The Roman philosopher Cicero in the 1st century BC
put forward the reasonable theory that cognitive decline could be offset by
vigorous mental activity.
During the Middle Ages, religion stifled medical
studies, and renewed efforts were not sparked again until the 17th and 18th
centuries, in the “Age of Enlightenment”.
The notion that those with severe mental problems
were possessed by demons and should be locked up in lunatic asylums or even
executed persisted into the 20th century, despite the humanitarian attitudes of
such specialists as the French physician Philippe Pinel and the pioneering work
of German psychiatrist Alois Alzheimer.
Dementia is a generic term for a group of related
illnesses, the commonest being the one named after the German psychiatrist.
Vascular dementia is the second most common.
Mental illness is taken much more seriously by the general
public nowadays than it used to be. Those who scornfully used the term “bird-brain”
probably didn’t realise it was they themselves who were being stupid. Birds
have very complex brains.
The cells in a bird’s brain interactively organise
with extraordinary precision how the bird communicates with other members of
the same species through characteristic calls and song, how it finds a suitable
nesting site either singly or in colonies, and how it manages to fly
individually or in flocks across unfamiliar terrain.
Some species manage to migrate thousands of
kilometres and turn up at just the right time to prepare for breeding in the
very same spot they used the previous year. This and much more in each
bird is dependent on one or two billion brain cells called neurons.
A honey bee has less than a million neurons in its
brain, which measures just one cubic millimetre but operates far faster than
the most advanced computers. The neuron cells allow bees to stay in touch with
one another using their own distinctive language, remember where to find their
favourite pollen and display extraordinary aerial agility.
We humans pride ourselves on being the most
intelligent of mammals because of the relative size of our brain and the
presence of some 1o0 billion neurons in the frontal part known as the cerebral
cortex.
Several types of neurons work in conjunction with
other cells to send and receive electrochemical nerve impulses that transmit
with lightning speed all sorts of messages to different parts of the body. In
short, neurons are the key to everything we think, sense and do from birth
to death.
Under normal conditions, our neurons continue to
function well into old age, but abnormal events such as strokes may kill
certain neurons, with serious and irreparable consequences – including the
onset of dementia.
While the causes of particular and sometimes mixed
forms of dementia may be somewhat different, the effects are rather similar:
loss of short-term memory,
confusion when trying to carry out basic daily
tasks, inability to solve problems, misplacing or losing small items, not
always recognising friends, not remembering names, uncertainty about time and
place, trouble understanding straightforward events.
Such frailties usually worsen with time and even if
the progression is slowed by medications it may be accompanied by increased
anxiety, depression and aggression. Except in the early stages of
dementia, these symptoms are likely to be more severe than having “senior
moments” such as making bad judgements now and again, occasionally forgetting
an appointment, getting the time or the day wrong but getting it right a little
later, temporarily struggling to come up with the right word.
It's estimated that in ancient times only 3% of the
population in Greece or the Roman Empire lived to
the age of 65. Since the early 20th century, life expectancy globally has risen
dramatically due to the advances in medical treatment. According to WHO figures
from 2018, average life expectancy is Portugal is now 78.3 for men and 84.5 for
women.
The main lifecycle problems in Portugal currently
are that this country has one of the lowest birth rates in the world and state
social care is extremely underfunded while professional private care is
expensive if not unaffordable.
In seeking a second term in the 6 October general
election, the popular Socialist prime minister, António Costa, has put both of
these matters high on his campaign agenda.
As the size of our aging community rapidly grows,
it is encouraging that medical technology is improving
internationally and understanding of all forms of dementia is increasing.
Meanwhile, it is far from easy for those with
dementia, their partners, families, friends and carers to cope, but cope we all
must do as best we can.
