Reichert J L, Ninaus M, Schuehly W, Hirschmann C, Bagga D, Schöpf V
Institute of Psychology, University of Graz, Graz, Austria; BioTechMed Graz, Graz, Austria.
Leibniz-Institut für Wissensmedien, Tübingen, Germany.
Behav Brain Res. 2017 Aug 30;333:98-108. doi: 10.1016/j.bbr.2017.06.022. Epub 2017 Jun 21.
Contextual odors can serve as retrieval cues when applied during encoding and recall/recognition of information. To investigate the neuronal basis of these observations, we collected functional MRI data while participants (n=51) performed an encoding and recognition memory task during which odors (congruent: CO or incongruent: IO) were presented as contextual cues. Recognition performance was not influenced by odor, but there was increased activation in the piriform cortex during successful encoding in the CO group, possibly indicating enhanced retrieval of information previously integrated with an olfactory percept. Moreover, group-independent component analysis revealed a stronger task-modulation of subcortical networks for IO versus CO during the recognition task, pointing to differences in olfactory processing. These observations provide a deeper understanding of the involvement of functional neuronal networks in memory tasks and a basis for further evaluation of the impact of odor contexts.
当在信息编码和回忆/识别过程中应用时，情境气味可以作为检索线索。为了研究这些观察结果的神经基础，我们收集了功能磁共振成像数据，参与者（n = 51）在执行编码和识别记忆任务时，气味（一致：CO或不一致：IO）作为情境线索呈现。识别性能不受气味影响，但在CO组成功编码期间梨状皮层的激活增加，这可能表明先前与嗅觉感知整合的信息检索增强。此外，独立于组的成分分析显示，在识别任务期间，与CO相比，IO的皮层下网络的任务调制更强，这表明嗅觉处理存在差异。这些观察结果为深入理解功能性神经网络在记忆任务中的参与提供了依据，并为进一步评估气味情境的影响奠定了基础。
