解説
Reconstructing Human Population Receptive Field Properties
2011 年 23 巻 1 号 p. 41-45
詳細
2011 年 23 巻 1 号 p. 41-45
A method is described that reconstructs population receptive field (pRF) properties in human visual cortex using functional MRI. This data-analysis technique fits a model of the pRF to the fMRI timeseries. It is able to reconstruct visual field maps and additional properties of the underlying neural population, such as quantitative estimates of the pRF size and surround. The pRF sizes vary systematically between visual field maps and as a function of eccentricity. As we change the stimulus, we expect different contributions from the underlying neural population and different pRF sizes. Different neural contributions to the pRF can be teased apart by comparing pRF size estimates from different stimuli within the same cortical location. In this fashion, the pRF method provides an additional technique to elucidate the neural computations of the human visual system.
