Author response: Neural coding of multiple motion speeds in visual cortical area MT

This study concerns how macaque visual cortical area MT represents stimuli composed of more than one speed of motion.The study is valuable because little is known about how the visual pathway segments and preserves information about multiple stimuli, and the study involves perceptual reports from both humans and one monkey regarding whether there are one or two speeds in the stimulus.The study presents compelling evidence that (on average) MT neurons shift from fasterspeed-takes-all at low speeds to representing the average of the two speeds at higher speeds.Ultimately, this study raises intriguing questions about how exactly the response patterns in visual cortical area MT might preserve information about each speed, since such information could potentially be lost in an average response as described here, depending on assumptions about how MT activity is evaluated by other visual areas.