Moving in on human motor cortex. Characterizing the relationship between body parts with non-rigid population response fields
Fig 10
The schematic shows the different steps in the fitting procedure. The different body parts are fitted in one half of a static Gaussian response field model (non-rigid pRF model), which is multiplied by the motor task onset design matrix (Motor task). The multiplication generates the estimated pRF response amplitude for each condition in time (pRF response), which is convolved with a canonical hemodynamic response function (HRF). This results in predicted timeseries (Prediction), which is contrasted with the observed fMRI timeseries (Data). Using the LMA, the position of the body parts in the non-rigid pRF model is updated in order to obtain the best fit.