Figure 3.

Relationship between the patterns of response to individual oriented gratings and the organization of orientation preference. The results depicted here were obtained from the cat used for the maps shown in Fig. 2. (A) Patterns of response to individual grating patterns. Within the posterior part of the presented image, the cortical zones activated by a single oriented grating have a beaded appearance. In contrast, more anteriorily, the pattern of activated domains is elongated approximately parallel to the ML axis. (B) Angle representation of the orientation map from the same part of cortex. Within the posterior part of the presented image, the preferred orientation is organized in elongated iso-orientation domains, located around orientation centers. More anteriorily, zones with iso-orientation preference are organized as slabs elongated parallel to the ML axis. The values of preferred orientation change continuously in an approximately linear manner along the PA axis.