论文标题
听觉流来自快速激发和缓慢的延迟抑制作用
Auditory streaming emerges from fast excitation and slow delayed inhibition
论文作者
论文摘要
在听觉流范式中，纯色调的交流序列可以被视为单个疾驰的节奏（积分），也可以将其视为具有分离的低调和高音调（隔离）的两个序列。尽管研究了数十年，但强调这种声音的感知分组的神经机制仍然是一个谜。为了确定捕获这一现象的合理最小神经回路，我们提出了一个发射速率模型，其中两个定期强迫神经种群与快速直接激发和缓慢的延迟抑制相结合。通过在非平滑，缓慢的态度中分析模型，我们可以分析地证明存在丰富的动力状态曲目及其参数依赖性过渡。我们施加了合理的参数限制，并将所有状态与知觉解释联系起来。与每个感知相关的状态所占据的刺激参数区域与行为实验中发现的感知相匹配。我们的模型表明，缓慢的抑制掩盖了在隔离过程中对后续音调的感知（正向掩盖），而快速激发可以使两种音调之间的大量音高差异进行集成。
In the auditory streaming paradigm alternating sequences of pure tones can be perceived as a single galloping rhythm (integration) or as two sequences with separated low and high tones (segregation). Although studied for decades, the neural mechanisms underlining this perceptual grouping of sound remains a mystery. With the aim of identifying a plausible minimal neural circuit that captures this phenomenon, we propose a firing rate model with two periodically forced neural populations coupled by fast direct excitation and slow delayed inhibition. By analyzing the model in a non-smooth, slow-fast regime we analytically prove the existence of a rich repertoire of dynamical states and of their parameter dependent transitions. We impose plausible parameter restrictions and link all states with perceptual interpretations. Regions of stimulus parameters occupied by states linked with each percept matches those found in behavioral experiments. Our model suggests that slow inhibition masks the perception of subsequent tones during segregation (forward masking), while fast excitation enables integration for large pitch differences between the two tones.
