Vecchiato G, Maglione A G, Scorpecci A, Malerba P, Marsella P, Di Francesco G, Vitiello S, Colosimo A, Babiloni Fabio
Dept of Physiology and Pharmacology, University of Rome "Sapienza", Italy.
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:4740-3. doi: 10.1109/EMBC.2012.6347026.
Interestingly, the international debate about the quality of music fruition for cochlear implanted users does not take into account the hypothesis that bilateral users could perceive music in a more pleasant way with respect to monolateral users. In this scenario, the aim of the present study was to investigate if cerebral signs of pleasantness during music perception in healthy child are similar to those observed in monolateral and in bilateral cochlear implanted users. In fact, previous observations in literature on healthy subjects have indicated that variations of the frontal EEG alpha activity are correlated with the perceived pleasantness of the sensory stimulation received (approach-withdrawal theory). In particular, here we described differences between cortical activities estimated in the alpha frequency band for a healthy child and in patients having a monolateral or a bilateral cochlear implant during the fruition of a musical cartoon. The results of the present analysis showed that the alpha EEG asymmetry patterns observed in a healthy child and that of a bilateral cochlear implanted patient are congruent with the approach-withdrawal theory. Conversely, the scalp topographic distribution of EEG power spectra in the alpha band resulting from the monolateral cochlear user presents a different EEG pattern from the normal and bilateral implanted patients. Such differences could be explained at the light of the approach-withdrawal theory. In fact, the present findings support the hypothesis that a monolateral cochlear implanted user could perceive the music in a less pleasant way when compared to a healthy subject or to a bilateral cochlear user.
有趣的是，关于人工耳蜗植入使用者音乐体验质量的国际辩论并未考虑到这样一种假设，即双侧使用者相对于单侧使用者可能会以更愉悦的方式感知音乐。在这种情况下，本研究的目的是调查健康儿童在音乐感知过程中愉悦感的大脑信号是否与单侧和双侧人工耳蜗植入使用者中观察到的信号相似。事实上，以往针对健康受试者的文献观察表明，额叶脑电图α活动的变化与所接受的感觉刺激的感知愉悦感相关（趋近 - 回避理论）。特别是，在这里我们描述了在观看音乐卡通片时，健康儿童以及单侧或双侧人工耳蜗植入患者在α频段估计的皮层活动之间的差异。本分析结果表明，健康儿童和双侧人工耳蜗植入患者中观察到的α脑电图不对称模式与趋近 - 回避理论一致。相反，单侧人工耳蜗使用者α频段脑电图功率谱的头皮地形图分布呈现出与正常人和双侧植入患者不同的脑电图模式。根据趋近 - 回避理论可以解释这些差异。事实上，目前的研究结果支持这样一种假设，即与健康受试者或双侧人工耳蜗使用者相比，单侧人工耳蜗植入使用者可能会以不那么愉悦的方式感知音乐。
