Fast, accurate motor control for movements requires the interaction of sensory, attention, decision making, and learning systems during their development and maintenance. Neuropathology is frequently revealed by deficits in motor control, or in compensatory learning mechanisms. Dr Mark Harwood has shown how the spatial scale of attention is the strongest determinant in the decision of when to move one's eyes our most frequent movement, and critical for information gathering. In collaboration with Prof. Laurent Madelain (University of Lille), we have shown the importance of reinforcement learning on movement timing and accuracy. Electrophysiology has identified cortical and subcortical loci for these effects, in collaboration with Prof. Rob McPeek (SUNY, New York), and we apply computational modelling to explain and interpret the data. Finally, new empirical and theoretical work is applied to multiple human conditions, such as Parkinson's disease, schizophrenia, and dyslexia.
- Vullings, C., Harwood, M.R., Madelain, L., (2019). Reinforcement reduces the size-latency phenomenon: a cost-benefit evaluation of saccade triggering. Journal of Vision, 19(4): 16. 10.1167/19.4.16
- de Vries, J., Azadi, R., & Harwood, M.R. (2016). The saccade size-latency phenomenon explored: Proximal target size is a determining factor in the saccade latency. Vision Research, 129: 87-97. doi.org/10.1016/j.visres.2016.09.006
- Azadi, R. & Harwood, M.R. (2014). Visual cues that are effective for contextual saccade adaptation. Journal of Neurophysiology, 111(11): 2307-19. Doi.org/0.1152/jn.00894.2013