Neuroanatomical dynamics of attention in stroke patients and healthy individuals: A magnetic stimulation investigation

Funded Activity Summary

Mechanisms of selective attention are of central importance in guiding human behaviour. The brain uses attention to enhance the processing of information that is behaviourally relevant, and to suppress irrelevant information. The operation of attention within sensory modalities (vision, touch, hearing) has been studied for many decades; however, little is known about how attention combines information between different senses. An understanding of 'crossmodal' attention is important for many reasons. First, real events in the environment provide inputs simultaneously from different locations to multiple senses, and these inputs must be integrated to yield coherent perception. Second, the most basic aspects of human perception depend upon attention; the brain implements selective mechanisms in order to filter the immense quantities of information that constantly bombard our sensory receptors. Finally, many neurological disorders are characterised by impairments of attention; these syndromes are debilitating for the patients themselves, and also place a heavy burden on caregivers and the healthcare system. This project will examine mechanisms of attention in healthy individuals and in stroke patients with attentional deficits. In all experiments, we will employ a new technique in neuroscience called 'transcranial magnetic stimulation' (TMS). TMS enables the safe and reversible stimulation of brain activity in humans. In the current project, we will use TMS with two broad objectives: (i) to determine the key brain areas involved in crossmodal attention in healthy individuals, and (ii) to treat attentional deficits that occur within and between the senses in stroke patients ('magnetic stimulation rehabilitation'). This research will provide important insights into the brain mechanisms that govern selective attention in the healthy brain, and will help guide future methods for managing and treating neurological disorders in which deficits of attention are prominent.

Funded Activity Details

Start Date: 01-01-2004

End Date: 01-01-2008

Funding Scheme: NHMRC Project Grants

Funding Amount: $360,363.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Economic history

ANZSRC Socio-Economic Objective (SEO)

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Other Keywords

Crossmodal Interactions | Extinction | Neurological Rehabilitation | Parietal Lobe | Selective Attention | Stroke | Transcranial Magnetic Stimulation | Unilateral Neglect

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