Rombaux Philippe, Huart Caroline, De Volder Anne G, Cuevas Isabel, Renier Laurent, Duprez Thierry, Grandin Cecile
Université Catholique de Louvain, Institute of Neurosciences, Unit of Otorhinolaryngology, Brussels, Belgium.
Neuroreport. 2010 Dec 8;21(17):1069-73. doi: 10.1097/WNR.0b013e32833fcb8a.
It has been shown that the volume of the olfactory bulb (OB) changes with function. The aim of this study was to investigate whether the OB volume and the olfactory function in early blind (EB) subjects increase compared with controls. Psychophysical testing of olfactory performances and OB volumetric measurements assessed by an MRI scan were studied. Quantitative olfactory function expressed in the odor discrimination and odor-free identification scores was higher in EB subjects compared with controls. The mean of right, left and total OB volume was 65.40, 75.48, and 140.89 mm, respectively for the EB subjects and 54.47, 52.11, and 106.60 mm, respectively for the controls, with these differences being significant. EB subjects have superior olfactory abilities and presented with significantly higher OB volume than the sighted controls. OB plasticity may explain this compensatory mechanism between visual deprivation and enhanced olfactory perception.
研究表明，嗅球（OB）的体积会随功能变化。本研究的目的是调查早期失明（EB）受试者的嗅球体积和嗅觉功能与对照组相比是否增加。研究了通过MRI扫描评估的嗅觉表现的心理物理学测试和嗅球体积测量。与对照组相比，EB受试者以气味辨别和无气味识别分数表示的定量嗅觉功能更高。EB受试者的右侧、左侧和总嗅球体积平均值分别为65.40、75.48和140.89立方毫米，对照组分别为54.47、52.11和106.60立方毫米，这些差异具有显著性。EB受试者具有 superior嗅觉能力，并且与有视力的对照组相比，其嗅球体积明显更大。嗅球可塑性可能解释了视觉剥夺和增强嗅觉感知之间的这种补偿机制。
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