A Flinders University researcher has started a new study into a poorly-understood condition called dystonia.
The neurological disorder affects thousands of Australians and causes muscles to contract and spasm involuntarily.
Dr Lynley Bradnam hopes her study will lead to an alternative treatment for neck dystonia, using a magnetic brain stimulation.
One of the study participants is Margot Chiverton, who had to give up an award-winning career as principal bassoon player in the Adelaide Symphony Orchestra because of the condition.
"It's just constant involuntarily movement and it's like a tug-of-war going on in your body. It's like some muscles are pulling one way and some muscles are pulling the other way and they're having a tug of war with each other, so it's not always visible to other people but there's an awful lot going on inside," she said.