Measurements of muscle strength, balance and gait Isometric muscle strength of the non-dominant hand is measured using a validated isokinetic hand dynamometer. Postural instability is studied when standing on a force plate with preferred placements of the feet. The instability is estimated by calculating the variability in the centre of pressure in relation to the supported foot area - with and without vision. The methods for testing have been developed exclusively for this project since clinical measurements used today are lacking in sensitivity. Details surrounding specific methods have been development in a joint cooperation with researchers from the Department of Integrative Medical Biology, Physiology unit (Professor Benoni Edin and Göran Westling, PhD).