Shift in speed selectivity of visual cortical neurons: A neural basis of perceived motion contrast

• DOI: 10.1073/pnas.96.7.4052
• Publication Date: 2002-07-26T14:39:15Z
• Authors: Chao-Yi Li; Jing-Jiang Lei; Hai-Shan Yao
• Keywords: Cortical neurons; Neural Activity

The perceived speed of motion in one part the visual field is influenced by its surrounding fields. Little known about cellular mechanisms causing this phenomenon. Recordings from mammalian cortex revealed that preference cortical cells could be changed displaying a contrast cell’s classical receptive field. neuron’s selectivity shifted to prefer faster if contextual surround was set at relatively lower speed, and vice versa. These specific center–surround interactions may underlie perceptual enhancement between adjacent