1. Facilitated Lexical Ambiguity Processing by Transcranial Direct Current Stimulation over the Left Inferior Frontal Cortex.
- Author
-
Aya S. Ihara, Takanori Mimura, Takahiro Soshi, Shiro Yorifuji, Masayuki Hirata, Tetsu Goto, Toshiki Yoshinime, Hiroaki Umehara, and Norio Fujimaki
- Subjects
- *
AMBIGUITY , *TRANSCRANIAL direct current stimulation , *FRONTAL lobe , *COMPREHENSION , *HUMAN behavior , *SEMANTICS , *PHYSIOLOGY - Abstract
Previous studies suggest that the left inferior frontal cortex is involved in the resolution of lexical ambiguities for language comprehension. In this study, we hypothesized that processing of lexical ambiguities is improved when the excitability of the left inferior frontal cortex is enhanced. To test the hypothesis, we conducted an experiment with transcranial direct current stimulation (tDCS). We investigated the effect of anodal tDCS over the left inferior frontal cortex on behavioral indexes for semantic judgment on lexically ambiguous and unambiguous words within a context. Supporting the hypothesis, the RT was shorter in the anodal tDCS session than in the sham session for ambiguous words. The results suggest that controlled semantic retrieval and contextual selection were facilitated by anodal tDCS over the left inferior frontal cortex. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF