EATING food from only the right side of the plate, shaving or applying makeup to only one side of the face, and running into objects on the left are common traits post-stroke - and some survivors' current therapies aren't working.
University of Queensland researchers are leading a world-first project that might help overcome disability that can affect many everyday activities for stroke survivors.
The research will investigate a new therapy in which robots would guide the hand to retrain the survivor's brain.
"The neuropsychological condition - called spatial neglect - often occurs after damage to the right hemisphere of the brain, making it difficult for stroke survivors to pay attention to the left side of space," said researcher Associate Professor Timothy Carroll from the UQ School of Human Movement and Nutrition Sciences.
"Up to 85 per cent of right hemisphere stroke survivors have reduced ability to attend to the left side of space, which can affect many activities.
"A person might fail to eat food on the left half of their plate, and they might only shave or apply makeup to the left side of their face.
"They may collide with objects or structures such as door frames on their left.
"At present there is no satisfactory treatment for people with spatial neglect."
One current treatment involves reaching towards visual targets while wearing spectacles containing prisms that shift the entire field of view towards the right.
To reach accurately while wearing the prism spectacles, people with spatial neglect must learn to reach targets on their neglected side.
Dr Carroll said the treatment's effectiveness varied dramatically - from long-lasting functional improvement to no benefit at all.
"We are testing a new approach in which we use a robot to physically push the person's hand to one side while they are reaching, instead of using prisms to distort vision," he said.
"We hope to show that learning to move straight when the robot pushes the hand to one side will help people with neglect to better orient attention to the left side of space.
"This will help us to better understand the links between attention and movement after stroke, and may lead to new rehabilitation approaches for stroke survivors with attention deficits."
Volunteers needed
Now the researchers are looking for stroke survivors with damage to the right hemisphere to participate in a single two-hour testing session at UQ's St Lucia campus in Brisbane.
Volunteers must be able to sit in a stable position for an hour, have no significant vision impairments (normal spectacles are fine), and be able to effectively reach to objects with their right arm.
Information on (07) 3365-6240, email timothy.carroll@uq.edu.au
