The authors found key differences in the early brain activity of normal adults when they were reading words compared to reading consonant strings and seeing faces. Time-frequency analyses showed a left-lateralized inferior frontal gyrus (pars opercularis) response to words between 100-250 ms in the beta frequency band that was significantly stronger than the response to consonant strings or faces. The left inferior frontal gyrus response to words peaked at ~130 ms. This response was significantly later in time than the left middle occipital gyrus, which peaked at ~115 ms, but not significantly different from the peak response in the left mid fusiform gyrus, which peaked at ~140 ms, at a location coincident with the fMRI-defined visual word form area (VWFA). Significant responses were also detected to words in other parts of the reading network, including the anterior middle temporal gyrus, the left posterior middle temporal gyrus, the angular and supramarginal gyri, and the left superior temporal gyrus.
The left inferior frontal gyrus is located in the front of the brain. This is a key region of the language brain and lesions can lead to the inability to articulate words. In the context of the experiment, the inferior frontal gyrus appears to play a key role integrating the visual and language aspects of reading.
Reading problems are common. Further research could identify whether the present findin
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