BY ELIZABETH SCOTT
The battle against chronic illness is long,
expensive and can involve a lot of guesswork. But closer monitoring of our body
in real time is improving chances for better long-term health – and,
ultimately, quality of life.
Over the
past decade, the evolution of medical technology has produced sophisticated,
hi-tech and non-invasive tools. Devices like advanced brain scans and
semi-invasive blood sugar sensors are opening exciting new doors to research –
and in the face of new data, whole medical disciplines are shifting focus as
science debunks theories of the past.
For a long
time, brain researchers could only theorize about how the brain worked; there
was no way watch it in living colour.
But
thanks to neuroimaging, “what we know today compared to a decade ago blows your
mind,” says Stan Kutcher an expert in adolescent mental health based at
Dalhousie University in Halifax.
“Explanations
for mental disorder [used to be] what I would call ‘brainless,' ” Dr. Kutcher
says. They were “based on theories of mind or psychological models in which the
brain did basically nothing.”
This was
because, until recently, data gleaned from CAT scans and EEGs wasn't
sufficiently sharp.
“The data
was overwhelming, but it wasn't specific enough because both
psychoneuroendocrinology and our special EEG analysis of function were still so
far removed from what was actually going on inside the brain itself. They were
very, very rough tools. So it was like trying to have sex wearing five condoms.
You're sort of in the general area, but you haven't got a clue what should be
going on.”
But where
brain scans of the mid- to late eighties proved there were structural
differences in the brains of people with mental disorders compared with healthy
ones, today we can also actually watch the brain in action as it functions,
both in health and in disease: “How does the brain control anger, listen to
music, read, express love?” Dr. Kutcher asks.
Answers to
those questions are being found, thanks to today's functional MRIs and PET
scans – technology that has eclipsed former scanning methods. Dr. Kutcher
believes that will soon lead to direct diagnosis. The hope is that brain
illness – from injury to stroke to mental illness – will become precisely and
accurately diagnosable, in turn making targeted, consistently successful
treatments possible.
“I wouldn't
be surprised if in the next 15 to 20 years two things happen,” Dr. Kutcher
says. “We will have abandoned our current nomenclature, which is based on
science and symptoms, for one based on a much better understanding of brain
dysfunction and the symptoms that are a result of that … and at that time
neuroimaging may well become diagnostic.”