Macaque V2 Neurons, But Not V1 Neurons, Show Choice-Related Activity

• DOI: 10.1523/jneurosci.2256-06.2006
• Publication Date: 2006-09-13T16:59:40Z
• Authors: Hendrikje Nienborg; Bruce G. Cumming
• Keywords: Extrastriate cortex; Binocular neurons; Stimulus (psychology)

In the macaque extrastriate cortex, robust correlations between perceptual choice and neuronal response have been demonstrated, frequently quantified as probabilities (CPs). Such are modest in early visual suggesting that CPs may depend on position of a neuron hierarchy processing. However, previous studies not compared neurons with similar precision equivalent tasks. We investigated role cortical CP using task for which significant described previously middle temporal area (MT). measured disparity-selective from both V1 V2. The stimulus was dynamic random dot stereogram, presented near or far disparity, masked by varying numbers binocularly uncorrelated dots. Two monkeys reported whether they perceived circular patch front behind surrounding annulus forced task. For V2 ( n = 69), average 0.56, first demonstration systematic 74), at chance level (0.51). pattern subgroup selected such statistical identical to MT (mean CP, 0.51 V1, 33; 0.58 V2, 54). This difference could be explained eye movements, size relative receptive field, differences disparity tuning. Rather, it seems reflect functional (at least processing) striate cortex.