Generating animal and tool names: An fMRI study of effective connectivity  

Oleh:

Vitali, Paolo ; Abutalebi, Jubin ; Tettamanti, Marco ; Rowe, James ; Scifo, Paola ; Fazio, Ferruccio ; Cappa, Stefano F. ; Perani, Daniela

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 93 no. 1 (2005), page 32-45.
Topik: fMRI; Neuroimaging; Effective connectivity; Functional integration; Psychophysiological interaction; Semantic memory; Semantic fluency; Semantic categories; Living and non-living; Tools and animals
Fulltext: 93_01_Vitali.pdf (824.26KB)

Isi artikel

The present fMRI study of semantic fluency for animal and tool names provides further evidence for category-specific brain activations, and reports task-related changes in effective connectivity among defined cerebral regions. Two partially segregated systems of functional integration were highlighted: the tool condition was associated with an enhancement of connectivity within left hemispheric regions, including the inferior prefrontal and premotor cortex, the inferior parietal lobule and the temporo-occipital junction; the animal condition was associated with greater coupling among left visual associative regions. These category-specific functional differences extend the evidence for anatomical specialization to lexical search tasks, and provide for the first time evidence of category-specific patterns of functional integration in word-retrieval.

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