Skip to main content
. 2019 Oct 30;10:4934. doi: 10.1038/s41467-019-12623-6

Fig. 4.

Fig. 4

Receptive field reconstructions of two example model units. Two out of the seven model units that were found to significantly predict responses of single face contacts in a leave-one out search (see Supplementary Fig. 12 for the full set). Model units were defined as units which were best correlated with a single iEEG contact responses to all N−1 exemplar sets and significantly predicted the held out responses based on a linear fit. a Model unit found in layer pool5 for set 1. Top left scatter plot depicts the responses of the model unit versus the mean HFA responses (50–500 ms) of the face contact. Red dots correspond to the three exemplars for which receptive field visualizations are presented (see below). Red line is the least-squares linear fit. Top right plot depicts the mean categorical responses of the face-selective contact to which the model unit matched. Bar inset presents the categorical selectivity of the model unit, which responded solely to faces and not to places or patterns. All error bars  denote s.e.m. across exemplars. Bottom gallery presents visualizations of the model unit’s receptive field for three example face exemplars: left column shows the original images in a descending order of the model unit’s response; middle column shows the reconstructed receptive field using deconvolution; right column shows the delta between the altered image following activation maximization and the original image, reflecting the added image that maximally amplified the model unit’s response. For visualization purpose, the contrast of each receptive field image was normalized by stretching the active range of RGB values. b Same as panel a, depicting a different model unit detected in layer pool5 for set 1 and its matching face contact. Note the view point selectivity and consistency of the face fragments that are highlighted by the two visualization procedures, and the large expanse of image changes following activation maximization. Copy rights holders: Woodie Allen photo—Colin Swan, license link https://creativecommons.org/licenses/by-sa/2.0/; Christopher Falkenberg photo—Christopher Falkenberg; Gila Gamliel photo—https://en.wikipedia.org/wiki/Gila_Gamliel#/media/File:Gila_Gamliel.jpg, license link https://creativecommons.org/licenses/by-sa/3.0/deed.en; Barack Obama photo—Pete Souza, license link https://creativecommons.org/licenses/by/3.0/deed.en