Emberson Lauren L, Cannon Grace, Palmeri Holly, Richards John E, Aslin Richard N
Princeton University, United States.
University of Houston, United States.
Dev Cogn Neurosci. 2017 Feb;23:26-38. doi: 10.1016/j.dcn.2016.11.002. Epub 2016 Dec 15.
How does the developing brain respond to recent experience? Repetition suppression (RS) is a robust and well-characterized response of to recent experience found, predominantly, in the perceptual cortices of the adult brain. We use functional near-infrared spectroscopy (fNIRS) to investigate how perceptual (temporal and occipital) and frontal cortices in the infant brain respond to auditory and visual stimulus repetitions (spoken words and faces). In Experiment 1, we find strong evidence of repetition suppression in the frontal cortex but only for auditory stimuli. In perceptual cortices, we find only suggestive evidence of auditory RS in the temporal cortex and no evidence of visual RS in any ROI. In Experiments 2 and 3, we replicate and extend these findings. Overall, we provide the first evidence that infant and adult brains respond differently to stimulus repetition. We suggest that the frontal lobe may support the development of RS in perceptual cortices.
发育中的大脑如何对近期经历做出反应？重复抑制（RS）是一种对近期经历的强烈且特征明确的反应，主要在成人大脑的感觉皮层中发现。我们使用功能近红外光谱技术（fNIRS）来研究婴儿大脑中的感觉（颞叶和枕叶）和额叶皮层如何对听觉和视觉刺激重复（口语单词和面孔）做出反应。在实验1中，我们发现额叶皮层存在重复抑制的有力证据，但仅针对听觉刺激。在感觉皮层中，我们仅在颞叶皮层发现了听觉重复抑制的暗示性证据，在任何感兴趣区域（ROI）均未发现视觉重复抑制的证据。在实验2和3中，我们重复并扩展了这些发现。总体而言，我们提供了首个证据表明婴儿和成人大脑对刺激重复的反应不同。我们认为额叶可能支持感觉皮层中重复抑制的发展。
