Effective interaction with the world requires the brain to signal behaviourally relevant events and organise an appropriate and timely motor response to such events. Unilateral brain lesion typically results in a reduction and slowing of motor behaviour directed to contralesional space. Accumulator models of choice and reaction time can distinguish between two possible functional causes of this deficit: slowed extraction of evidence in favour of a motor response or an increase in the required amount of evidence for response generation. Three patients with unilateral damage to the right hemisphere were tested on a visually guided saccade task.
- brain lesion
- computational modelling
- motor response
Ludwig, C. J. H., Butler, S. H., Rossit, S., Harvey, M., & Gilchrist, I. D. (2009). Modelling contralesional movement slowing after unilateral brain damage. Neuroscience Letters, 452(1), 1-4. https://doi.org/10.1016/j.neulet.2009.01.033