Brand G, Millot J L, Biju C
Laboratoire de neurosciences, UFR Sciences et techniques, place Leclerc, 25000 Besançon, France.
C R Acad Sci III. 2000 Nov;323(11):959-65. doi: 10.1016/s0764-4469(00)01235-x.
The study of olfactory lateralization in human subjects has given rise to many publications, but the findings have often been contradictory. Most research used either birhinal or monorhinal stimulations, but rarely a comparison between these two types of olfactory input. The aim of this study was to investigate variations in psychophysiological measurements and test each side of the nose and binasal performances. This work used bilateral electrodermal recordings and compared the skin conductance responses (SCRs) for a pleasant odorant (isoamyl acetate) and an unpleasant odorant (triethylamine) in a suprathreshold concentration on 30 dextral subjects (16 females and 14 males). First, the results reported no differences between the two nostrils but differences in electrodermal activity (EDA) in relation to the odorant: 1) higher amplitude in response to unpleasant versus pleasant odorant; 2) no differences between monorhinal and birhinal stimulations for the unpleasant odour but higher amplitude in response to birhinal versus monorhinal for the pleasant odour. Second, the results showed constant bilateral differences in EDA recordings and are discussed in terms of hemispheric asymmetry activation.
对人类受试者嗅觉偏侧化的研究已产生了许多出版物，但研究结果往往相互矛盾。大多数研究使用双侧嗅觉或单侧嗅觉刺激，但很少对这两种嗅觉输入方式进行比较。本研究的目的是调查心理生理学测量的变化，并测试每侧鼻腔及双侧鼻腔的表现。这项研究采用双侧皮肤电记录，并比较了30名右利手受试者（16名女性和14名男性）对阈上浓度的一种愉悦气味剂（乙酸异戊酯）和一种不愉悦气味剂（三乙胺）的皮肤电导反应（SCR）。首先，结果显示两个鼻孔之间没有差异，但皮肤电活动（EDA）与气味剂有关：1）对不愉悦气味剂的反应幅度高于愉悦气味剂；2）对于不愉悦气味，单侧嗅觉和双侧嗅觉刺激之间没有差异，但对于愉悦气味，双侧嗅觉刺激的反应幅度高于单侧嗅觉刺激。其次，结果显示EDA记录中存在持续的双侧差异，并根据半球不对称激活进行了讨论。
