The Japanese journal of neuropsychology

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ArticleTitle	Neurological basis and network of language system
Language	J
AuthorList	Mika Otsuki
Affiliation	Graduate School of Health Sciences, Hokkaido University
Publication	Japanese Journal of Neuropsychology: 28 (2), 145-150, 2012
Received
Accepted
Abstract	We investigated neural basis of word retrieval adopting various methods: clinical study on the causative lesions of impairment of naming, fMRI and equivalent current dipole source (ECDL) of word retrieval. The process of word retrieval should implicate various brain systems such as semantic system, lexical system, phonemic system and articulatory system. Our study indicated that there need at least two routes for word retrieval. One route is originated from the left temporal lobe, leads to the left frontal lobe by way of the left parietal lobe (supramariginal gyrus). Another route also originates from the left temporal lobe and just proceeding forward to the tip of the temporal lobe and gets over to the left frontal lobe. The former routs should implicate phonemic weighted process and the latter route should implicate semantic weighted process.
Keywords	word retrieval, neural basis, neural network, language system