Effects Of Lead And Socio-cultural Factors On Cognition And Behaviour Of Children In Port Pirie And Broken Hill
Funder
National Health and Medical Research Council
Funding Amount
$394,825.00
Summary
The effect of lead on children's 'intelligence' is controversial. Poorer IQ scores in children with higher exposure to lead, have been found reasonably consistently, - but there is disagreement on whether lead exposure is simply a common ASSOCIATE of poor IQ, or whether it actually CAUSES deficits. In 1994, the NHMRC prudently recommended a graded series of interventions to be implemented, depending on the proprtion of children in the community with blood lead concentrations in specific categori ....The effect of lead on children's 'intelligence' is controversial. Poorer IQ scores in children with higher exposure to lead, have been found reasonably consistently, - but there is disagreement on whether lead exposure is simply a common ASSOCIATE of poor IQ, or whether it actually CAUSES deficits. In 1994, the NHMRC prudently recommended a graded series of interventions to be implemented, depending on the proprtion of children in the community with blood lead concentrations in specific categories above 10 ug lead -100 ml of blood. The choice of this figure (10 ug-dl) was more pragmatic than scientific; there being very little data on the health effects of exposures below 10 ug-dl available at that time. A recent analysis of pooled data from past studies has now suggested there may be very large effects on child IQ at blood lead concentration BELOW 10 ug-dl. Health authorities will soon be lobbied intensely to spend vast sums on new lead abatement programs. Cities like Port Pirie and Broken Hill (where cooperative programs have achieved such significant reductions in lead exposure that a high percentage of their children now have blood lead levels below 10 ug-dl), will be forced to examine expensive options to avoid closure of the industries which provide their economic backbones, if this analysis proves to be correct. Our proposal argues that before committing to new and costly abatement programs, there is an urgent need to augment our evidence-base by conducting a new study ofchildren with lead exposures below 10 ug-dl, using more modern measures of intelligence. The study will pay closer attention to some of the socio-cultural and inherited determinants of child IQ which may have confounded the lead-IQ association in past studies, and will supplement IQ assessments (which are now considered to derive from a very old and narrow view of intelligence) with new tools for measuring 'intelligence' that may be less socio-culturally dependent.Read moreRead less
Developmental Changes In Cerebral Oxygenation After Term And Preterm Birth
Funder
National Health and Medical Research Council
Funding Amount
$445,306.00
Summary
Approximately 10% of all births are preterm and the numbers of infants surviving are increasing. We have previously found that infants born preterm have lower blood pressure over the first 6 months after term equivalent age than infants born at term. We will use new technology to examine how preterm birth affects brain oxygenation and how this is altered with gestational age, sleep states and sleeping position, to provide insights into their increased risk for SIDS.
Supraspinal Neural Adaptations In The Transition From Acute Injury To Chronic Pain And Disability
Funder
National Health and Medical Research Council
Funding Amount
$429,360.00
Summary
Although there have been significant clinical advances in the management of injury and the control of acute pain following tauma, many people still develop disabling conditions of chronic pain. Chronic pain and disability occurs even though the acute signs of trauma have subsided and injuries have healed. People with chronic pain conditions not only experience ongoing changes in sensation (ie., most commonly lowered thresholds for pain, touch evoked pain and spontaneous pain), they also endure a ....Although there have been significant clinical advances in the management of injury and the control of acute pain following tauma, many people still develop disabling conditions of chronic pain. Chronic pain and disability occurs even though the acute signs of trauma have subsided and injuries have healed. People with chronic pain conditions not only experience ongoing changes in sensation (ie., most commonly lowered thresholds for pain, touch evoked pain and spontaneous pain), they also endure a number of disabilities for example disrupted family and social relations, disturbed sleep, loss of appetite, weight changes, loss of sex drive, changes in menstrual cycle, the inability to cope with stressors, and often moderate to severe anxiety and depression. The proposed research aims to (i) identify changes in brain circuits which are responsible for producing these patterns of pain and disability following injury and (ii) attempts to selectively reverse some of these disabilities by reversing the brain changes. The results of this study will offer for the first time a rational basis for improving the outcomes of injury and pain management in the acute phase of trauma, by identifying and reversing the critical changes which predict the advent of the state state of chronic pain and disability.Read moreRead less
Depression, Anxiety And Somatic Distress: Syndromal Structure And Relationship To Onset Of Clinical Disorder
Funder
National Health and Medical Research Council
Funding Amount
$224,085.00
Summary
The project aims to identify the principal dimensions or syndromes underlying symptoms of psychological distress (negative emotional states such as depression, anxiety, stress and fatigue). We plan to use an intensive longitudinal design to examine how these syndromes develop into episodes of clinical disorder. We expect that episodes of disorder will be predicted not only by closely related syndromes, but also by other causally related syndromes - for example, a period of increased anxiety and ....The project aims to identify the principal dimensions or syndromes underlying symptoms of psychological distress (negative emotional states such as depression, anxiety, stress and fatigue). We plan to use an intensive longitudinal design to examine how these syndromes develop into episodes of clinical disorder. We expect that episodes of disorder will be predicted not only by closely related syndromes, but also by other causally related syndromes - for example, a period of increased anxiety and stress may precipitate a depressive disorder. This information is important for understanding the aetiology of clinical disorders, for refining diagnostic criteria, and for the prediction and prevention of disorder. We also plan to collect information about the degree of disability that people suffer and the type of health services they access at various levels of severity of each syndrome. We expect that subclinical levels of some syndromes will be associated with substantial impairment and service usage, but that for other syndromes impairment will be minimal until clinical levels of severity are reached. This information will give a more complete picture of the community-wide burden of emotional distress, and will be directly relevant to health planning and policy.Read moreRead less