The functional brain networks underpinning perceptual decision-making

This thesis examines the neural and cognitive mechanisms that underpin perceptual decision-making, with a focus on the complex interplay between functional brain networks, sensory evidence accumulation, and attentional processes. The research combines computational modelling and non-invasive forms of neurophysiological measurement, including electroencephalography (EEG) and functional magnetic resonance imaging (fMRI), to delineate the key processes that govern perceptual decisions, such as evidence accumulation. Within this thesis, I elucidate the spatial and temporal dynamics of decision-related brain activity and report a series of experiments that examine how these dynamics are modulated by the processing of distractors.