The Role Of The Systemic Milieu In Preventing Motor Unit Remodelling And Loss During Ageing
Funder
National Health and Medical Research Council
Summary
Motor unit remodeling and loss contributes to the decline in muscle mass, strength and quality of life in our aging population. Recent data shows that exposing aged mice to 'blood-borne factors' from the circulation of a young mouse can reverse the age-associated deficits in motor unit structure and function. A better understanding of the factors controlling these anti-aging effects will be vital for finding new compounds to reverse the aging process and improve quality of life.
Reflex Control Of Human Jaw Muscles By Periodontal Mechanoreceptors
Funder
National Health and Medical Research Council
Funding Amount
$405,173.00
Summary
An understanding of the functional connection between the jaw muscles and various receptor organs in and around the mouth is necessary to elucidate the process of chewing and its underlying rules. Unless the details of this functional connection in health and disease are thoroughly understood, the diagnosis and treatment of chewing related disorders will remain at the present state. For example: a We still do not know why chewing in edentulous subjects is less efficient and why the bite forces i ....An understanding of the functional connection between the jaw muscles and various receptor organs in and around the mouth is necessary to elucidate the process of chewing and its underlying rules. Unless the details of this functional connection in health and disease are thoroughly understood, the diagnosis and treatment of chewing related disorders will remain at the present state. For example: a We still do not know why chewing in edentulous subjects is less efficient and why the bite forces in these individuals immediately fall to about 20 % of the teethed value. Do jaw muscles in these subjects get weak because they get less support from the receptor organs around the teeth? a We still do not understand the cause-causes of the temporomandibular dysfunction (a painful disease involving jaw muscles) which forms 18.7 % of total dental patients consulted per week in South Australia. This South Australian study indicated that the current treatments (such as pain killers, night plates, massage) Ocures? only about the half of all patients. We cannot increase the success of the treatment if we do not fully understand the control mechanisms of chewing? It is expected that the results of this study will establish the functional connection between one of the most important receptor organs in the mouth (periodontal mechanoreceptors) to the jaw muscle motoneurons in subjects with healthy teeth and gums and will illustrate the importance of keeping the periodontium healthy for developing strong and smooth masticatory forces. This knowledge can also allow us to treat jaw related disorders by approaches that bring back normal operation of the system. For example, this knowledge may help us design active dentures that replace the missing support.Read moreRead less
Reconsideration Of The Mechanisms Underlying Movement Changes With Pain
Funder
National Health and Medical Research Council
Funding Amount
$401,361.00
Summary
Pain changes the way we move. Although undisputed, there is a surprising lack of agreement regarding the underlying mechanisms. This project involves an innovative mix of neurophysiological methods to investigate how the drive to muscle cells from the nervous system is altered during pain. We aim to resolve the perplexing problem of how pain changes our ability to activate muscle. Our findings are likely to provide a clear understanding of the underlying mechanisms and guide rehabilitation.