This article is a part of a large-scale brain mapping project aimed at finding the relations among semantic categories in oral Russian-language texts and brain activity as measured using functional magnetic resonance imaging (fMRI). The goal of present study in particular is to examine the nature of lexical semantic relations and find an appropriate lexical space, homeomorphic to the activation patterns in the brain. Participants were presented with oral narratives, which described significant social issues from the first-person perspective. Stimuli were annotated using a dictionary and a vector approach. Results show that fMRI signal and clusters of related words have similar patterns of brain activation across participants. Results also show that annotation by a list of features more strongly contributes to prediction of the observed activation patterns. Findings confirm the hypothesis of situational semantic representation in the brain.

本文是大规模大脑映射项目的一部分，该项目旨在发现俄文口语文本中的语义类别与使用功能磁共振成像（fMRI）测量的大脑活动之间的关系。本研究的目的尤其是检查词汇语义关系的性质，并找到适当的词汇空间，使其与大脑中的激活模式同胚。与会者获得了口头叙述，从第一人称视角描述了重大的社会问题。使用字典和矢量方法对刺激进行注释。结果表明，功能磁共振成像信号和相关词簇在参与者之间具有相似的大脑激活模式。结果还表明，通过一系列特征进行注释会更有助于预测观察到的激活模式。研究结果证实了大脑中情境语义表示的假设。