人类顶叶在不同数量范围下的动态适应

Abstract The brain’s representations are encoded in the collective activity of neural populations whose non-monotonic tuning properties define the population code. Adaptive behavior calls for flexible retuning of this code as stimulus statistics change across contexts. Yet how such adaptation occurs is unknown. Using fMRI during a numerosity-estimation task with variable number ranges, we show that number representations in human parietal cortex dynamically recalibrate to context, enabling context-sensitive behavioral accuracy. The tuning properties of neural populations collectively shift and