Imaizumi S, Mori K, Kiritani S, Hosoi H, Tonoike M
Department of Speech and Cognitive Sciences, Graduate School of Medicine, University of Tokyo, Bunkyo, Japan.
Neuroreport. 1998 Mar 30;9(5):899-903. doi: 10.1097/00001756-199803300-00025.
The task-dependent laterality of the auditory cortices was investigated by measuring the magnetic fields elicited by three forms of a Japanese verb, which differed in terms of prosodic and phonetic cues. Significant task-dependent magnetic fields were found in both hemispheres during a prosody-related task, but only in the left during a phoneme-related task. The latency was similar to the mismatch negatively which reflects the neural activity of automatic cue decoding. These results suggest that task-dependent schemata are activated at least partially in parallel with automatic cue-decoding processes such that those in the left hemisphere process linguistic information irrespective of acoustic cues whereas those in the right hemisphere process prosodic information.
通过测量一个日语动词的三种形式所诱发的磁场，研究了听觉皮层的任务依赖偏侧性，这三种形式在韵律和语音线索方面存在差异。在与韵律相关的任务中，两个半球均发现了显著的任务依赖磁场，但在与音素相关的任务中，仅在左侧发现了该磁场。其潜伏期与失配负波相似，失配负波反映了自动线索解码的神经活动。这些结果表明，任务依赖图式至少部分地与自动线索解码过程并行激活，以至于左半球的图式处理语言信息而不考虑声学线索，而右半球的图式处理韵律信息。
