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Emotion Processing in Early Blind and Sighted Individuals

机译：早期盲目和患有人的情感加工

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Objective: Emotion processing is known to be mediated by a complex network of cortical and subcortical regions with evidence of specialized hemispheric lateralization within the brain. In light of prior evidence indicating that lateralization of cognitive functions (such as language) may depend on normal visual development, we investigated whether the lack of prior visual experience would have an impact on the development of specialized hemispheric lateralization in emotional processing. Method: We addressed this issue by comparing performance in early blind and sighted controls on a dichotic listening task requiring the detection of specific emotional vocalizations (i.e., suggestive of happiness or sadness) presented independently to either ear. Results: Consistent with previous studies, we found that sighted individuals showed enhanced detection of positive vocalizations when presented in the right ear (i.e., processed within the left hemisphere) and negative vocalizations when presented in the left ear (i.e., right hemisphere). It is interesting to note that although blind individuals were as accurate as sighted controls in detecting the valance of the vocalization, performance was not consistent with any pattern of specialized hemispheric lateralization. Conclusions: Overall, these results suggest that although the lack of prior visual experience may not lead to impaired emotion processing performance, the underlying neurophysiological substrate (i.e.,degree of special hemispheric lateralization) may depend on normal visual development.
机译：目的：已知情绪加工由复杂的皮质和皮质区域内介导，具有脑内脑内专门的半球横向化的证据。根据现有证据，表明认知函数（如语言）的横向化可能取决于正常的视觉开发，我们调查了缺乏先前的视觉体验，对情绪加工的专业半球侧向化产生影响。方法：我们通过比较早期盲目和视力控制中的表现来解决这一问题，以便检测特定情绪发声（即，宣传幸福或悲伤）独立于任何耳朵呈现的特定情绪发声。结果：与先前的研究一致，我们发现当左耳（即，在左半球内）和负发声中呈现时，所谓的个体显示出对正起的阳性发声的检测。值得注意的是，虽然盲人在检测到发声的遵守方面，但盲人在检测到遵守率时，性能与任何专门的半球侧向化模式不一致。结论：总体而言，这些结果表明，虽然缺乏先前的视觉体验可能不会导致情绪加工性能受损，但是潜在的神经生理学基质（即，特殊的半球横向化）可能取决于正常的视觉开发。

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