Topic: visual orientation discrimination

Stringer et al. used two-photon calcium imaging to record activity from tens of thousands of V1 cells in head-fixed mice during a visual orientation discrimination task, and showed that the neural response encodes stimulus discrimination thresholds nearly 100 times more precise than the corresponding behavioral thresholds. Animal arousal state was monitored by measuring the locomotion speed during task execution, but could not explain this large discrepancy in discrimination threshold. Here, we take advantage of the fact that the behavioral data was acquired in that experiment, and ask whethe

It is well known that humans and other animals can exploit the probabilities of events occurring at different spatial locations to covertly guide attention. However, attentional shifts observed before saccadic eye movements seem to rely on different mechanisms than those observed during covert spatial attention. In this study, we investigated if presaccadic attentional shifts are modulated by the probability of spatial cues. Nineteen participants performed a visual orientation discrimination task in which a central cue indicated the location of a target stimulus with four different probabiliti