Auditory Processing Deficits In Specific Language Impairment And Specific Reading Disability:Their Effects And Treatment
Funder
National Health and Medical Research Council
Funding Amount
$314,250.00
Summary
One possible cause of specific language impairment (SLI) and specific reading disability (SRD; commonly known as dyslexia) is an inability to discriminate between sounds. Such an impairment could affect the ability to discriminate between simple speech sounds (phonemes) which are the basic building blocks for developing spoken language and reading skills. How many children with SLI or SRD have poor sound discrimination? What pattern of spoken language and reading impairments do these children ha ....One possible cause of specific language impairment (SLI) and specific reading disability (SRD; commonly known as dyslexia) is an inability to discriminate between sounds. Such an impairment could affect the ability to discriminate between simple speech sounds (phonemes) which are the basic building blocks for developing spoken language and reading skills. How many children with SLI or SRD have poor sound discrimination? What pattern of spoken language and reading impairments do these children have as a result of this impairment? Can poor sound discrimination be fixed? If it can, does it improve spoken language and reading impairments? And if it does, does it have an immediate effect or does it take some time to make a difference? These are some of the questions that will be addressed by this research. The answers will help us develop a training program that focuses specifically on improving the sound discrimination abilities of children who really need it. This will be a more efficient and inexpensive (if not free) than the Fast ForWord program that trains multiple non-verbal and verbal processing abilities regardless of whether a child has an impairment in all (or any) of these abilities and is therefore time consuming (approximately 80 hours) and expensive (approximately $AUD2000). The data will also help up better identify the spoken and written language profiles that characterise children who have sound discrimination deficits so we can better predict whether they would benefit from training programs such as Fast ForWord. And the data will tell use whether impaired sound discrimination can be used to predict whether infants might be at risk for later spoken language and reading problems.Read moreRead less
Improving The Communication Of People With Severe Traumatic Brain Injury: A Clinical Trial
Funder
National Health and Medical Research Council
Funding Amount
$448,293.00
Summary
Traumatic brain injury is the leading cause of disability in young Australians, and is particularly prevalent in young men. The condition disturbs thinking and problem solving. Ultimately, these problems manifest in impaired verbal communication. Communication problems following traumatic brain injury can make critical relationships-such as father, husband, and employee-impossible to sustain. Those affected are socially inappropriate and uncomfortable to be around, which causes a lifetime of los ....Traumatic brain injury is the leading cause of disability in young Australians, and is particularly prevalent in young men. The condition disturbs thinking and problem solving. Ultimately, these problems manifest in impaired verbal communication. Communication problems following traumatic brain injury can make critical relationships-such as father, husband, and employee-impossible to sustain. Those affected are socially inappropriate and uncomfortable to be around, which causes a lifetime of lost friendships, unemployability, and social isolation. Minimisation of these lifelong effects is of the utmost importance to the health of those affected, and is critical to reducing the economic burden of the condition. Two approaches have been shown to improve the communication of those with traumatic brain injury. Training in social skills is helpful, as is training partners to deal with difficult communication behaviours. However, to date, no research has concurrently studied these two approaches to rehabilitation. Consequently, it is unknown whether best results are achieved with either one of the two methods, or both. The present project uses a clinical trials approach in an innovative evaluation of three methods of treating those with traumatic brain injury compared with a control group. The trial involves the conceptual advances of including cost effectiveness of treatment as an outcome measure, and inclusion of advanced methods to measure the intricacies of verbal communication. The multidisciplinary team of Chief Investigators has international track records in the requisite disciplines for the study of traumatic brain injury and its rehabilitation.Read moreRead less
Molecular Genetics Of Dyslexia: A Component Processes Approach
Funder
National Health and Medical Research Council
Funding Amount
$348,960.00
Summary
With the advent of the human genome project, Australian researchers into serious childhood reading disorders are now in a position to make breakthroughs in understanding the complex linkages between genes and dyslexia. It is widely acknowledged that previous studies on the genetics of dyslexia have been limited by their failure to distinguish the different component processes in reading and the different patterns of dyslexia that they produce, and by being unable to look widely across the human ....With the advent of the human genome project, Australian researchers into serious childhood reading disorders are now in a position to make breakthroughs in understanding the complex linkages between genes and dyslexia. It is widely acknowledged that previous studies on the genetics of dyslexia have been limited by their failure to distinguish the different component processes in reading and the different patterns of dyslexia that they produce, and by being unable to look widely across the human genome. This new research addresses these two problems. Firstly, the researchers have developed a computational model of reading that identifies around a dozen basic mental processes which are recruited during skilled reading. This model provides the extremely precise phenotypes required for genetic research. Secondly, the researchers will take advantage of both very high density scans within known regions of interest on chromosomes 2,6, and 15, as well as a genome-wide scan of 400 markers small elements of DNA whose position within the genome is known, thus allowing researchers to narrow-down the location of new genes for reading. The research thus promises not only to refine our understanding of the basis for three previous genetic markers of dyslexia, but also to potentially uncover new genes related to specific elements of reading across the genome. The project pools the resources of the Macquarie Centre for Cognitive Science, the Australian Genome Research Facility, and The Garvan Institute and the researchers hope that the work will lead eventually to identifying the genes for dyslexia and to improved diagnosis and treatment of reading disorders in Australia.Read moreRead less
The Relationship Between Cognition And Interictal Discharges: Language Organization And Spike Localisation In BECTS
Funder
National Health and Medical Research Council
Funding Amount
$216,500.00
Summary
Benign epilepsy with centro-temporal spikes (BECTS, rolandic epilepsy) is a common cause of seizures in primary school children. Despite this it is poorly understood. Although seizures are infrequent, brainwave recordings (electroencephalography, EEG) reveal striking abnormalities present much of the time. Large, sharply contoured brain waves (spikes) are seen frequently, increasing during sleep. The pattern of the spikes, and the characteristic nature of seizures have suggested the epilepsy ari ....Benign epilepsy with centro-temporal spikes (BECTS, rolandic epilepsy) is a common cause of seizures in primary school children. Despite this it is poorly understood. Although seizures are infrequent, brainwave recordings (electroencephalography, EEG) reveal striking abnormalities present much of the time. Large, sharply contoured brain waves (spikes) are seen frequently, increasing during sleep. The pattern of the spikes, and the characteristic nature of seizures have suggested the epilepsy arises near the face area of the motor cortex, but this remains unproven. Functional magnetic resonance imaging (fMRI) is a safe and non-invasive way of imaging cerebral function, to reveal the brain at work . The technology is contributing to major advances in understanding of basic human functions such as language. Recent developments at the Brain Research Institute in Melbourne mean it is now possible to record EEG during fMRI. This has permitted visualisation of spike activity in the brain. The BRI is the only centre in Australia, and one of only a handful in the world that is able to perform such studies. One purpose of this study is reveal the location of spikes in BECTS. Recent studies have revealed subtle language and learning difficulties in BECTS children. Our preliminary EEG-fMRI studies have suggested spikes arise from brain regions adjacent to important language areas. It is possible that the frequent spikes of BECTS are interfering with adjacent cognitive processes. In addition to spike mapping, we will perform functional imaging of language to look for interactions between spike and language areas, and compare with patterns of language activation seen in normal children. The demonstration of spike related affects on cognition may lead to a reassessment of current epilepsy management strategies, which focus predominately on seizure control. This study, with researchers in Cairns and Melbourne, shares the benefits of world class research with regional Australia.Read moreRead less
Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the ....Bipolar affective disorder (BP), or manic-depressive illness, is a major cause of disability and mortality worldwide. It has a lifetime prevalence of about 1% and suicide risk of about 20%. The disorder is characterised by episodes of mania or hypomania and depression, appearing in varying succession, with or without intermission. Twin, family, and adoptive studies point to a strong genetic component leading to the development of bipolar disorder, with a heritability of the order of 80%. Yet the identification of the genetic basis of the disease has proved exceedingly difficult, with numerous studies producing no definitive data. The lack of convincing results has been interpreted as an indication of complex genetic mechanisms and underlying differences between affected families and ethnic groups. Genetically isolated populations, where most individuals descend from a small number of founders, are believed to hold great potential for understanding the genetic basis of complex diseases, such as bipolar disorder. Affected subjects in such populations are likely to share the same predisposing genes, making these genes easier to identify. During the last 10 years, we have been involved in the study of bipolar disorder in one such population, with very promising results. In this project, we propose to take the research further by collecting more affected families, confirming the current positive findings and narrowing down the search to a small region, possibly a single gene. If successful, the study will be a major breakthrough which, by identifying a molecular pathway and disease mechanism, will contribute valuable and generally valid information on the biological basis of mood disorders.Read moreRead less
Understanding The Role Of Muscarinic Receptors In The Pathophysiology Of Depression And Bipolar Disorder
Funder
National Health and Medical Research Council
Funding Amount
$480,074.00
Summary
The causes of bipolar disorder and major depressive disorder, which effect many Australians, remain unknown. We have recently shown decreases in muscarinic receptors in the brain of people with bipolar disorder and major depressive disorder. Muscarinic receptors are important in maintaining the functions of the brain that seem to be affected in people with bipolar disorder and major depressive disorder. Here we seek to understand how changes in muscarinic receptors occur in both disorders.
Anti-Estrogens - A Potential Treatment For Bipolar Affective Disorder In Women?
Funder
National Health and Medical Research Council
Funding Amount
$239,250.00
Summary
Bipolar Affective Disorder (BPAD) or Manic-Depressive Illness is a serious mental illness with high morbidity and mortality. The cause of the illness is still unclear and the underlying neurochemical changes are different for the manic phase compared with the depressive phase. The current treatments for BPAD are limited in scope and not biochemically well understood. There are gender differences in the presentation and outcomes for BPAD which adds to the complexity of the illness. We are proposi ....Bipolar Affective Disorder (BPAD) or Manic-Depressive Illness is a serious mental illness with high morbidity and mortality. The cause of the illness is still unclear and the underlying neurochemical changes are different for the manic phase compared with the depressive phase. The current treatments for BPAD are limited in scope and not biochemically well understood. There are gender differences in the presentation and outcomes for BPAD which adds to the complexity of the illness. We are proposing a study to develop a new type of treatment for the manic phase of BPAD and are exploring the use of anti-estrogens in women with mania. The background to our proposed study comes from a few case reports suggesting that anti-estrogen agents such as progesterone and tamoxifen may be useful adjuncts to treatment. We conducted a small pilot study comparing the addition of oral tamoxifen with oral progesterone and placebo in 10 women with mania and found that the women who received tamoxifen made significantly better improvements in their manic symptoms over a 28-day trial. The research study we are now proposing is a larger, three-arm, double blind, placebo controlled, 28-day adjunctive study in women with mania to expand and clarify our pilot study findings. Patients in our proposed study would receive either 40mg per day tamoxifen or 20mg per day progesterone or placebo in addition to standardised lithium medication. We will measure enzyme activity (protein kinase C) and estrogen-progesterone levels to understand more about the mechanisms of action by these new hormone treatments. BPAD is a crippling disorder and if we are successful, then tamoxifen treatment may be an important new treatment. This proposed study will also shed new light on some of the neurochemical mechanisms underlying BPAD as well as opening up the new area of hormone treatments for serious mental illness.Read moreRead less
Understanding How Language And Reading Problems Develop: A Population-based Longitudinal Study From Infancy To Age 7
Funder
National Health and Medical Research Council
Funding Amount
$667,507.00
Summary
Early language and reading problems are common and therefore significant public health problems. They are disabling and have life-long implications for oral and written communication skills, social and emotional well-being, cognition, behaviour, academic achievement and employment. This study will address the following three problems: 1. To date no study has documented how language and reading problems develop from infancy (8 months) through to school age (7 years). 2. Little is known about risk ....Early language and reading problems are common and therefore significant public health problems. They are disabling and have life-long implications for oral and written communication skills, social and emotional well-being, cognition, behaviour, academic achievement and employment. This study will address the following three problems: 1. To date no study has documented how language and reading problems develop from infancy (8 months) through to school age (7 years). 2. Little is known about risk factors, identified early in infancy and childhood, that can be reliably used to predict language and reading problems later in childhood. 3. The relationships between language difficulties and reading problems are poorly understood. Therefore, we currently have no satisfactory methods for reliably detecting which children at much younger ages are at risk of later language disorders or reading problems. Without this information it is impossible to develop effective prevention and early intervention programs. These programs are critical if we are to: a) Prevent language and reading problems from occurring, thereby reducing the prevalence of the problem b) Intervene early in childhood, thereby reducing in the longer term the burden and cost associated with language and reading problems. The proposed study builds on an existing substantial investment by the NHMRC in the Early Language in Victoria Study (ELVS). It will provide a world-first description of the evolution of language difficulties and reading problems from infancy through to school age within a single population cohort.Read moreRead less