Publications by authors named "Philippe Petrov"
Article Synopsis
- The study investigates how the prefrontal cortex of behaving monkeys processes information for making context-dependent decisions during visual tasks.
- Using advanced analysis techniques, researchers tracked neural activity related to identifying targets and non-targets based on visual cues and object identity.
- Results reveal that while object choice information is quickly encoded in the contralateral hemisphere, cue information is weaker and present earlier, indicating a complex interaction between different types of information during decision-making and attentional competition.
Prefrontal neurons code many kinds of behaviourally relevant visual information. In behaving monkeys, we used a cued target detection task to address coding of objects, behavioural categories and spatial locations, examining the temporal evolution of neural activity across dorsal and ventral regions of the lateral prefrontal cortex (encompassing parts of areas 9, 46, 45A and 8A), and across the two cerebral hemispheres. Within each hemisphere there was little evidence for regional specialisation, with neurons in dorsal and ventral regions showing closely similar patterns of selectivity for objects, categories and locations.
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- The prefrontal cortex adapts coding strategies by reallocating neuron resources to process information based on its relevance to the task at hand.
- In a study with monkeys, early responses showed equal neural activity for both target and nontarget objects; however, attention later shifted predominantly to the important target.
- The speed of this shift in focus depended on previous training, indicating that the prefrontal cortex is capable of dynamically adjusting its responses based on what is most behaviorally significant.