6.2.1 Detection mechanisms

Figure 6.12: The neural circuitry directly supports motion detection. As the image feature moves across the retina, nearby feature detection neurons (labeled $a$ and $b$) activate in succession. Their outputs connect to motion detection neurons (labeled $c$). Due to different path lengths from $a$ and $b$ to $c$, the activation signal arrives at different times. Thus, $c$ activates when the feature was detected by $a$ slightly before being detected by $b$.