Biosciences Institute, Newcastle University, Newcastle upon Tyne, NE2 4HH, UK.
Institute of Neuroscience and Psychology, University of Glasgow, Glasgow G128QB, UK.
Cereb Cortex. 2022 Aug 3;32(16):3568-3580. doi: 10.1093/cercor/bhab434.
Whether human and nonhuman primates process the temporal dimension of sound similarly remains an open question. We examined the brain basis for the processing of acoustic time windows in rhesus macaques using stimuli simulating the spectrotemporal complexity of vocalizations. We conducted functional magnetic resonance imaging in awake macaques to identify the functional anatomy of response patterns to different time windows. We then contrasted it against the responses to identical stimuli used previously in humans. Despite a similar overall pattern, ranging from the processing of shorter time windows in core areas to longer time windows in lateral belt and parabelt areas, monkeys exhibited lower sensitivity to longer time windows than humans. This difference in neuronal sensitivity might be explained by a specialization of the human brain for processing longer time windows in speech.
人类和非人类灵长类动物是否以相似的方式处理声音的时间维度仍然是一个悬而未决的问题。我们使用模拟发声的频谱和时变复杂度的刺激，研究了恒河猴对声音时间窗的大脑处理基础。我们在清醒的猕猴中进行了功能磁共振成像，以确定对不同时间窗的反应模式的功能解剖结构。然后，我们将其与之前在人类中使用的相同刺激的反应进行了对比。尽管整体模式相似，从核心区域处理较短的时间窗到外侧带和副外侧带区域处理较长的时间窗，但猴子对较长时间窗的敏感性低于人类。这种神经元敏感性的差异可能是由于人类大脑专门用于处理更长的语音时间窗。
