Laterality in metaphor processing: Lack of evidence from functional magnetic resonance imaging for the right hemisphere theory  

Oleh:

Rapp, Alexander M. ; Leube, Dirk T. ; Erb, Michael ; Grodd, Wolfgang ; Kircher, Tilo T.J.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 100 no. 2 (2007), page 142-149.
Topik: Language lateralisation; Metaphor nonliteral language; fMRI; Right hemisphere; Laterality; Schizophrenia; Metaphoric language; Proverb
Fulltext: 100_02_Rapp.pdf (245.83KB)

Isi artikel

We investigated processing of metaphoric sentences using event-related functional magnetic resonance imaging (fMRI). Seventeen healthy subjects (6 female, 11 male) read 60 novel short German sentence pairs with either metaphoric or literal meaning and performed two diVerent tasks: judging the metaphoric content and judging whether the sentence has a positive or negative connotation. Laterality indices for 8 regions of interest were calculated: Inferior frontal gyrus (opercular part and triangular part), superior, middle, and inferior temporal gyrus, precuneus, temporal pole, and hippocampus. A left lateralised network was activated with no signiWcant diVerences in laterality between the two tasks. The lowest degree of laterality was found in the temporal pole. Other factors than metaphoricity per se might trigger right hemisphere recruitment. Results are discussed in the context of lesion and hemiWeld studies.

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