Visual hallucinations in Parkinson’s disease—imbalances in top-down vs. bottom up information processing
Dr Claire O'Callaghan (University of Cambridge)
Tuesday, 11 December 2018, 1pm to 2pm
Schlich Theatre, Department of Plants Sciences, South Parks Road, Oxford, OX1 3RB
Hosted by Dr Michele Veldsman
Abstract: Perception can be considered a process of inference where bottom-up sensory information is integrated with previously learnt information about the world. Imbalances in this process can contribute to the development of hallucinations. My talk will cover work in Parkinson’s disease visual hallucinations, where we have used a variety of methodologies (i.e., cognitive tasks, MRI, and computational modelling) to explore sensory evidence accumulation processes and top-down influences over vision related to the default network. These studies will be discussed with reference to the evolution of visual hallucinations in Parkinson’s disease and the potential role for a predictive processing account.