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Pharyngeal Wall Folding: Role In Upper Airway Collapsibility
Funder
National Health and Medical Research Council
Funding Amount
$217,274.00
Summary
In obstructive sleep apnoea (OSA) the throat closes during sleep. In order for the throat to close the surface of the throat has to fold. Mathematical models predict that the more folds present, the more stable a structure will be. This research will examine how folding of the airway surface of the throat is achieved in subjects with and without OSA. It will also develop ways of changing the folding patterns using bench, animal and human studies. This will result in new treatments for OSA.
While many cases of asthma are mild, severe cases require extensive health care resources and are virtually unresponsive to conventional treatment. This project will investigate whether specific compounds released from the airway are able to cause lung damage and airway abnormalities similar to that in severe asthma. We will investigate whether these changes are responsive to conventional therapy and investigate a potential treatment for regaining this responsiveness in severe asthma.
Atrial fibrillation (AF) is the most common sustained cardiac rhythm disorder. Obstructive sleep apnea (OSA), is four times more common among patients with AF than without. OSA has been associated with a greater recurrence rate of AF after initially successful treatment of AF and treatment of OSA reduces recurrence of AF. To identify the underlying mechanisms, we aim to determine effects of OSA on atrial electrical activation and to characterize sleep apnea in AF patients in a more precise way.
Intrinsic Response Of Airways To Cyclical Dilation And Elongation In Breathing
Funder
National Health and Medical Research Council
Funding Amount
$355,014.00
Summary
Variations in lung pressures during breathing produce cyclical expansion of the airway tubes. These respiratory movements provide one of the most powerful protective mechanisms for the lung. The protective mechanism fails in asthma so that cyclical expansion of the airway tubes can make breathing more difficult. Current belief is that protective and harmful effects of lung expansion occur by either relaxation or contraction of the muscles lining the airway tubes. Findings from this laboratory su ....Variations in lung pressures during breathing produce cyclical expansion of the airway tubes. These respiratory movements provide one of the most powerful protective mechanisms for the lung. The protective mechanism fails in asthma so that cyclical expansion of the airway tubes can make breathing more difficult. Current belief is that protective and harmful effects of lung expansion occur by either relaxation or contraction of the muscles lining the airway tubes. Findings from this laboratory suggest that the above dogma needs reconsideration. The project will utilize a novel model of the lung to enable us to determine the mechanisms producing both the protective effect, and in asthmatics the harmful effects of cyclical lung expansion. Once the part of the lung that 'fails' in this aspect of asthma has been detected then therapeutic strategies can be put in place to reverse the defect.Read moreRead less
Development Of An Effective Therapy For Cheyne-Stokes Breathing In Heart Failure.
Funder
National Health and Medical Research Council
Funding Amount
$604,030.00
Summary
During sleep, patients with heart failure often exhibit a cyclic pattern of breathing in which a period of regular breathing alternates with a period when breathing ceases. This breathing pattern is associated with increased mortality and reduced quality of life but to date no effective treatment for it exists. We have developed a method to calculate an exact level of carbon dioxide to stabilise breathing in each individual, offering the prospect of a better night’s sleep and a longer life.
Patients With Obstructive Sleep Apnoea And Motor Control
Funder
National Health and Medical Research Council
Funding Amount
$302,798.00
Summary
Obstructive Sleep Apnoea is a major health concern, affecting at least 4% of the population, associated with obesity, and aging. The symptoms of sleep apnoea are definitively associated with cardiovascular complications. I am focused on understanding how sleep apnoea patients are remodelled with the rewiring of connections between the brain and muscles. Using neurophysiological techniques, this project will study how the anatomy and functional connections of circuits change with sleep apnoea.
Obstructive sleep apnea (OSA) is one of the most common complications of obesity and is independently associated with a reduced quality of life and cardiovascular disease. This project aims to identify the underlying factors linking obesity with OSA by examining how weight loss surgery can improve these factors. These important findings will contribute greatly to our understanding of OSA pathophysiology and are necessary to find better treatments for obesity-associated OSA.
It’s The Amount That Counts: The Impact Of Seven Days Of Sleep Restriction On Predictors Of Type 2 Diabetes.
Funder
National Health and Medical Research Council
Funding Amount
$743,269.00
Summary
The aim of this project is to examine the relationship between sleep duration (5, 6, 7, 8, or 9h per day for one week) and glucose metabolism. This will allow us to quantify the amount of harm that different levels of sleep loss cause to the physiological systems that protect people from developing serious health disorders. In particular, the results of the project will be invaluable in the design of effective behavioural interventions for the prevention and/or treatment of type 2 diabetes.
Circadian Mechanisms For Sex Differences In Shift Work Tolerance
Funder
National Health and Medical Research Council
Funding Amount
$562,002.00
Summary
It is well-established that women respond more poorly than men to shift work schedules, having more health complaints, more drowsiness and more accidents at work than men. The physiological cause of this sex difference is not known. Our research suggests that differences in the circadian rhythms of women and men may promote shift work intolerance in women. This study is designed to examine sex differences in the effect of office-level light on the biological clock during a simulated night shift.
THE EFFECT OF LONG ACTING BRONCHODILATORS ON VENTILATION IN COPD
Funder
National Health and Medical Research Council
Funding Amount
$143,676.00
Summary
COPD is a common and important smoking-related lung disease. Well-established treatments with inhaled medications including long-acting bronchodilators have a proven clinical track record. However the physiological basis for their effects is still under investigation. This research examines some of the physiological changes in lung function and the response to long-acting bronchodilators in patients with COPD, and may help explain why some patients respond to therapy while others do not, leading ....COPD is a common and important smoking-related lung disease. Well-established treatments with inhaled medications including long-acting bronchodilators have a proven clinical track record. However the physiological basis for their effects is still under investigation. This research examines some of the physiological changes in lung function and the response to long-acting bronchodilators in patients with COPD, and may help explain why some patients respond to therapy while others do not, leading to more targeted therapeuticsRead moreRead less