Fig 2. The distributions of CRF center positions and size of recorded neurons for an example single recording session.

Each CRF was estimated by fitting a 2D Gaussian to the neural responses. A: The distribution of estimated CRF centers of neurons in an example recording session. CRF centers (red crosses) are overlaid on four example stimulus patches. The red circle at the center illustrates the mean extent of estimated CRFs (1.8 degrees in diameter). B: The histogram of estimated CRF extents of the neurons in the same session. The extent was defined as the diameter of a circle whose area is identical to the area surrounded by the half-height of the 2D Gaussian. The mean estimated diameter was 1.4 degrees in this session.