Figure 17.

Mosaic organization of body pattern control in the optic lobe and the downstream neural processing stages. A, Conceptual diagram based on the findings of the present study illustrating that the control units of individual body pattern components are organized in a mosaic fashion in the motor command module involved in body pattern generation. Each module contains all the control units of body pattern components with different proportions. These modules are spread widely across the medulla of the optic lobe. Therefore, when stimulating any module in the optic lobe, various numbers of different components can be evoked. In turn, different body patterns can be generated by activating distinct subregions in the module. Note the module depicted here represents a continuous structure of cell islands in the medulla. B, Flow chart showing the neural processing stages responsible for body pattern generation. Visual information from eye is integrated by mosaic modules in the optic lobe, then the optic lobe sends motor commands to the downstream lobes such as the peduncle lobe, lateral basal lobe, and chromatophore lobe to control the chromatophore organs.