Perceptually Bistable Three-Dimensional Figures Evoke High Choice Probabilities in Cortical Area MT

• DOI: 10.1523/jneurosci.21-13-04809.2001
• Publication Date: 2018-04-05T14:20:19Z
• Authors: Jonathan V. Dodd; Kristine Krug; Bruce G. Cumming; Andrew J. Parker
• Keywords: Percept; Stimulus (psychology); Bistability; Binocular disparity

The role of the primate middle temporal area (MT) in depth perception was examined by considering trial-to-trial correlations between neuronal activity and reported sensations. A set moving random dots portrayed a cylinder rotating about its principal axis. In this structure-from-motion stimulus, direction rotation is ambiguous resulting percept undergoes spontaneous fluctuations. stimulus can be rendered unambiguous addition binocular disparities. We trained monkeys to report these stimuli, one which had zero disparity. Many disparity-selective neurons MT are selective for defined Across repeated presentations (zero-disparity) there correlation firing rotation, as found Bradley et al. (1998). Quantification effect using choice probabilities (Britten al., 1996) allowed us demonstrate that cannot explained eye movements, behavioral biases, or attention spatial location. therefore appear involved perceptual decision process. mean probability (0.67) substantially larger than discrimination task 1996). This implies make different contribution two tasks. For task, either pool used smaller larger.