Thank you very much for having me today.
I'm a clinician, researcher, and I also do a lot of education and training around fetal alcohol spectrum disorder and other neurodevelopmental disabilities, as I am a developmental pediatrician.
What I'm going to talk about to you today is more from that clinical, medical, diagnostic perspective. I think we've heard from our other presenters that FASD is common, maybe in up to 5% of the population, it's very expensive, and it is overrepresented in the justice system. As I've worked across the lifespan, it's overrepresented in children who are in the foster care system as well. It's a lifelong disability, and I strongly feel it is a mental disorder. In the DSM-5, which is the diagnostic and statistical manual, it is currently being considered for psychiatry use, so it is definitely recognized as a mental disorder caused by damage from prenatal exposure to alcohol.
It is an invisible disability because we only see the dysmorphic face of full fetal alcohol syndrome in about 10% of the population. As Dr. Cook explained, we create FAS in the laboratory rat models and we know it's just a small window of time, three days, in human gestation where that face is a result of the teratogenic effect of alcohol. It's not surprising then that we don't see the face in most individuals affected by prenatal exposure to alcohol.
We also don't have any biomarkers, such as a blood test. There are some biomarkers of interest in the research world, such as eye movement, but we have a lot of research ahead of us before that becomes a clinical tool. Right now we need to assess 10 different brain domains in the clinic in order to make a diagnosis of fetal alcohol spectrum disorder. It's also a differential diagnosis. We consider many other factors.
We also know that prenatal exposure to alcohol is often not the only factor. Dr. Cook mentioned some of the maternal stress factors, maternal nutrition. There's also genetic endowment. We also know that postnatal stressors, especially in the early years—exposure to trauma, maltreatment, toxic stress, and so on—can also have a long-term impact on brain development that is not necessarily reversible by simply optimizing the environment if we've lost that window of time in the early years.
Currently, we don't have diagnostic capacity in Canada, although we're far ahead of many other countries to provide the diagnosis. There's less diagnosis available for the adult population. There are some good models of diagnostic clinics embedded within the justice system that I think need to be followed as examples of good practice. The diagnosis is not just a label of a four-letter word. It must lead to a constellation of strengths and challenges for that individual so that we can design the appropriate intervention programs.
I'm going to talk a little bit about the scientific evidence we have from both the animal models, as well as from the human neuroimaging and neurochemical techniques that support that alcohol exposure prenatally does indeed cause brain damage.
We know that alcohol can alter the brain cell development in the neurons by causing simply cell death, or it can interfere with the neurons migrating to the right level of the brain where they need to be for functioning and then connecting with other neurons, because that's how information is conveyed from neuron to neuron. It can interfere with myelination, which is an important part of that conductivity of those pathways. It can cause epigenetic changes and it can alter neurotransmitter activity. Neurotransmitters are those chemicals that go from one brain cell to the other in brain functioning. The brain neurotransmitters impacted are dopamine, serotonin, and glutamine, which are implicated in almost all of the mental health disorders that we know of. It can also alter the stress response through the hypothalamic-pituitary axis and cortisol, so if you have the normal stress responses, you can see in certain situations the right outcome is not going to happen.
One of the exciting parts is neuroimaging studies. A clinical MRI that I do today on my clients shows me usually no abnormalities in structure unless we have abnormal neurological findings that I find on my clinical exam. But in our lab we're able to do very highly refined imaging and we do see abnormalities, specifically in decrease of brain volume and abnormalities in cortical thickness. There's actually less thinning, so less pruning goes on. Pruning is important in normal learning and development.
We see reductions in key pathways connecting one part of the brain to the other, especially the frontal lobes of the brain, which are the seat of our executive functions. Those pathways are reduced, and we've seen, in our own research lab at the Glenrose, a direct correlation with one pathway and difficulties with reading.
Functional MRIs have shown that there is a difference in function in different areas of the brain. One study showed that the frontal lobe of the brain was working harder as the task got more complex, but it was less efficient and it led to early mental exhaustion. Again, harder work doesn't necessarily get you a better result.
We talked a little about the adverse environments that can be compounding the effect of prenatal exposure to alcohol, and I think this is an area of.... I'm always looking for opportunities for prevention intervention. When we look at adverse life experiences and we look at why women drink, they're all rooted in the social determinants of health and this is an opportunity to put in place interventions and preventions to break this multi-generational cycle.
I'm going to quickly go over some of the brain assessments that I can do in my day-to-day clinic.
An average assessment costs about $4,000 and you can see from the number of domains that we test why this is an expensive assessment, but it's worth the money and investment to inform best practices moving forward. Intellectual ability is one area that we use as a baseline, but IQ does not define the disability and level of impairment in individuals with FASD. Often their IQ levels are within the average range. We need to move beyond the basic testing into assessing memory, attention, executive functioning, and adaptive functioning.
One problem with an IQ above 70 is that currently you do not qualify for any of the supportive funding or housing systems as adults, and in most cases as children and teenagers, you don't qualify for extra educational supports. What happens is that you then transition to adulthood without essential academics, training, or employability options. You have no funding. That can lead to homelessness and unemployment. Food as a commodity is scarce. You're in a homeless situation. You can see this person coming in contact with other people who may drag them into becoming involved with the law. We know when we look at intellectual abilities, often individuals with FASD are slower at processing, so this has implications in a very fast-moving court scene, arrest situation, where they may not be processing all the information.
One of the areas we also look at is academic abilities, learning. Reading disability is very common when we do our academic assessments. They may have superficial reading abilities, so that they can read the words but they lack the comprehension and understanding. You can see how somebody reading their parole conditions or reading a document that they need to sign to say this is what happened.... Don't necessarily leap to the conclusion that they have understood what they have read. This may explain a lot of our breaches.
Math disability is really important, which impacts both money and time management and understanding. No wonder our individuals don't show up on time for an appointment or they don't understand the financial value of items and they aren't able to handle their own money for budgeting and daily living without extensive mentorship and other external supports.
Attention issues are another I'd like to cover. It's very common, about 65% of individuals with FASD also get a diagnosis of attention deficit hyperactivity disorder. They have problems focusing on what is relevant, inhibiting responses to what is not relevant. They're easily distracted by extraneous cues in their environment. Having a short attention span impacts your ability to learn in the academic world, but you also can't learn from day-to-day experiences. If you have FASD with a short attention span, you may not be paying attention to all the information in your environment. You can't put the information into your memory and retrieve it when you want it, and then you can't use any of this information for the right decision-making at the right time. This can help explain a lot of them not being able to learn from their mistakes or the consequences of their actions. Don't assume the individual with FASD who appears to be listening is attaining and processing the information.
Memory problems are also significant, both in verbal memory and in visual-spatial items. Short-term memory and long-term memory can be impacted. If you have an impaired memory, you may not be able to remember and use the information that you were taught in your group therapy session in order to use it in that moment in time when you need to use it. Memory deficits and FASD are especially more noticeable in an emotionally charged situation, such as being interrogated for a crime or being a witness on the stand when you're a victim. Problems with memory can lead to confabulation.
Executive function is a really core deficit. Executive function refers to higher order processes that result in goal-directed behaviour, such as planning, organizing, impulse control, inhibition, flexible thinking, working memory, reasoning, and so on. We can measure all of these in our clinic situation, and we look at all those core deficits. They can certainly explain why somebody is not able to control their impulses and make the right decision at the right time.
Communication deficits, which I've already alluded to, are significant. They can present well, talk a lot, but don't always understand at a higher level. We analyze, in our clinic situation, inferencing, predicting, social communication deficits. All are implicated in getting into trouble with the law. Social communication deficits are also implicated in making bad social choices, getting in with the wrong crowd, and then being led and becoming more of a victim rather than a perpetrator.
All of these deficits lead to impaired adaptive functioning, which at the end of the day is how you function safely in life and independently. We often say our individuals with FASD are maladaptive, but really they just simply can't use all of the information from their environment to make that right decision at the right time. We need to put in place good strategies.
We've already talked about the overlap with mental health, and when you reflect back on the fact that our neurotransmitter systems are changed by the prenatal exposure to alcohol, there's no wonder that we have a higher level of mental health disorders associated with FASD.
In my briefing notes I did provide a reference to the legal conference that was held in Edmonton on the legal issues of FASD. It has been printed through the Institute of Health Economics website and I would refer the members of this committee to have the opportunity to both look at the consensus conference and the document that was developed as the result of that. Many learned individuals contributed.
Thank you.