Encoding of Stimulus Probability in Macaque Inferior Temporal Cortex.
Encoding of Stimulus Probability in Macaque Inferior Temporal Cortex.
复制标题
猕猴下颞皮层中刺激概率的编码。
DOI：
10.1016/j.cub.2016.07.007
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发表时间：
2016-09-12
期刊：
影响因子：
9.2
通讯作者：
Ungerleider, Leslie G.
中科院分区：
文献类型：
--
作者：
Bell, Andrew H.;Summerfield, Christopher;Morin, Elyse L.;Malecek, Nicholas J.;Ungerleider, Leslie G.
最佳的感知决策需要感觉信号与刺激概率的先验信息相结合。虽然有几种理论认为刺激发生的概率信息是在感觉皮层中编码的，但来自神经元记录的证据尚未完全支持这一观点。我们记录了活动从单个神经元在下颞叶皮层（IT），而猴子执行的任务，涉及歧视退化图像的面孔和水果。线索是脸还是水果的相对概率是由一个潜在变量操纵的，这个变量没有透露给猴子，并且在每次记录过程中都发生不可预测的变化。除了响应刺激身份（脸或水果），人口的反应在IT编码的长期刺激的概率，无论是脸或水果刺激更有可能发生。面部反应神经元表现出减少的放电率预期的面孔，与“期望抑制”的效果一致，但预期的刺激解码从多变量人口信号具有更高的准确性。这些发现支持“预测编码”理论，即哺乳动物视觉系统中的神经信号主动编码和更新有关局部感觉环境的预测。
Optimal perceptual decisions require sensory signals to be combined with prior information about stimulus probability. Although several theories propose that probabilistic information about stimulus occurrence is encoded in sensory cortex, evidence from neuronal recordings has not yet fully supported this view. We recorded activity from single neurons in inferior temporal cortex (IT) whilst monkeys performed a task that involved discriminating degraded images of faces and fruit. The relative probability of the cue being a face vs. a fruit was manipulated by a latent variable that was not revealed to the monkeys, and which changed unpredictably over the course of each recording session. In addition to responding to stimulus identity (face or fruit), population responses in IT encoded the long-term stimulus probability of whether a face or a fruit stimulus was more likely to occur. Face-responsive neurons showed reduced firing rates to expected faces, an effect consistent with “expectation suppression”, but expected stimuli were decoded from multivariate population signals with greater accuracy. These findings support ‘predictive coding’ theories, whereby neural signals in the mammalian visual system actively encode and update predictions about the local sensory environment.
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影响因子：
16.2
作者：
Bastos AM;Usrey WM;Adams RA;Mangun GR;Fries P;Friston KJ
通讯作者：
Friston KJ
DOI：
10.1093/cercor/bhn161
发表时间：
2009-05
期刊：
Cerebral cortex (New York, N.Y. : 1991)
影响因子：
--
作者：
den Ouden HE;Friston KJ;Daw ND;McIntosh AR;Stephan KE
通讯作者：
Stephan KE
DOI：
10.1098/rstb.2005.1622
发表时间：
2005-04-29
影响因子：
6.3
作者：
Friston, KJ
通讯作者：
Friston, KJ
影响因子：
3.7
作者：
Kaliukhovich, Dzmitry A.;Vogels, Rufin
通讯作者：
Vogels, Rufin
影响因子：
9.2
作者：
Kok, Peter;Bains, Lauren J.;de lange, Floris P.
通讯作者：
de lange, Floris P.