Percept-choice sequences driven by interrupted ambiguous stimuli: A low-level neural model
Percept-choice sequences driven by interrupted ambiguous stimuli: A low-level neural model
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DOI：
10.1167/7.8.10
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发表时间：
2007-01-01
影响因子：
1.8
通讯作者：
van Wezel, R. J. A.
中科院分区：
文献类型：
--
作者：
Noest, A. J.;van Ee, R.;van Wezel, R. J. A.
现有的关于在稳定观察模糊刺激下自发感知转换的神经学解释并不符合刺激中断导致相同感知在多个开/关周期中重新出现的事实。我们提出了一个简单的神经模型，可以解释观察到的行为，并预测几个更复杂的感知序列，而不需要调用任何“高级”决策或记忆。刺激开始时的感知选择与标准的感知转换有着根本的不同，它主要取决于迄今为止被忽视的局部“分流”适应和近阈值神经基线之间的相互作用。刺激的开/关时间控制着重复、交替或更复杂选择序列的产生。我们的模型还解释了“启动”和“习惯化”对感知选择的影响，重新解释了最近的神经生理学数据，并预测了感知序列水平上出现的滞后现象，偶尔会出现噪声引起的序列“跳变”。
Existing neural explanations of spontaneous percept switching under steady viewing of an ambiguous stimulus do not fit the fact that stimulus interruptions cause the same percept to reappear across many ON/OFF cycles. We present a simple neural model that explains the observed behavior and predicts several more complicated percept sequences, without invoking any "high-level" decision making or memory. Percept choice at stimulus onset, which differs fundamentally from standard percept switching, depends crucially on a hitherto neglected interaction between local "shunting" adaptation and a near-threshold neural baseline. Stimulus ON/OFF timing then controls the generation of repeating, alternating, or more complex choice sequences. Our model also explains "priming" versus "habituation" effects on percept choice, reinterprets recent neurophysiological data, and predicts the emergence of hysteresis at the level of percept sequences, with occasional noise-induced sequence "hopping ''.