The role of afferent input in the development of focal task specific dystonia

Funded Activity Summary

The term dystonia is used to describe a condition that is characterised by abnormal muscle activation patterns. This leads to impaired control of voluntary movements. Depending upon which part of the body is affected, dystonia may be classified as generalised (affecting two or more body segments), hemi (involving one side), segmental (involving adjacent body parts or a segment), or focal (affecting one part of the body). Many of the focal dystonias are also task specific and the aim of this proposal is to investigate these task-specific focal dystonias. Task-specific focal dystonia is common in the community and causes considerable suffering and loss of productivity. For example, writer's cramp (a common form of task specific focal dystonia) is probably the commonest cause of writing difficulty in patients in whom this is the sole complaint. No treatment regimen has been shown to be effective in alleviating it's often debilitating symptoms. The aim of these studies is to further define the pathophysiological changes seen in task-specific dystonia and investigate the mechanisms responsible for their generation. Using the techniques of transcranial magnetic stimulation and peripheral nerve stimulation we will investigate the organisation of the motor cortex in this condition and examine the influence of afferent input on intrinsic cortical circuitry. We hypothesise that the motor regions of the brain are more sensitive to the particular repeated patterns of sensory information reaching the brain during repetitive movement and this results in abnormal alterations in organisation that may be responsible for the symptoms of dystonia. Additionally, we predict that it may be possible to reverse these organisational changes by applying novel patterns of nerve stimulation

Funded Activity Details

Start Date: 01-01-2005

End Date: 01-01-2007

Funding Scheme: NHMRC Project Grants

Funding Amount: $213,000.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Central Nervous System

ANZSRC Socio-Economic Objective (SEO)

There are no SEO codes available for this funding activity

Other Keywords

afferent input | cortical reorganisation | dystonia | focal dystonia | motor cortex | plasticity | rehabilitation of motor function | transcranial magnetic stimulation

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