Thalamus and Attention Kazuhiko Tokoro 1 , Hironobu Sato 1 , Mayumi Yamamoto 2 , Yoshiko Nagai 2 1Departments of Neurosurgery, Kanagawa Rehabilitation Center 2Clinical Psychology, Kanagawa Rehabilitation Center Keyword: 視床 , 注意選択 , 注意障害 , 視床網様核 , 視床出血 , thalamus , attentional modulation , thalamic reticular nucleus , pulvinar , thalamic hemorrhage pp.1471-1480
Published Date 2015/12/1
DOI https://doi.org/10.11477/mf.1416200324
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Attention is the process by which information and selection occurs, the thalamus plays an important role in the selective attention of visual and auditory information. Selective attention is a conscious effort; however, it occurs subconsciously, as well. The lateral geniculate body (LGB) filters visual information before it reaches the cortex (bottom-up attention). The thalamic reticular nucleus (TRN) provides a strong inhibitory input to both the LGB and pulvinar. This regulation involves focusing a spotlight on important information, as well as inhibiting unnecessary background information. Behavioral contexts more strongly modulate activity of the TRN and pulvinar influencing feedforward and feedback information transmission between the frontal, temporal, parietal and occipital cortical areas (top-down attention). The medial geniculate body (MGB) filters auditory information the TRN inhibits the MGB. Attentional modulation occurring in the auditory pathway among the cochlea, cochlear nucleus, superior olivary complex, and inferior colliculus is more important than that of the MGB and TRN. We also discuss the attentional consequence of thalamic hemorrhage.

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