Interhemispheric Inhibition, Intrahemispheric Activation, and Lexical Capacities of the Right Hemisphere: A Tachistoscopic, Divided Visual-Field Study in Normal Subjects  

Oleh:

Querne, Laurent ; Eustache, Francis ; Faure, Sylvane

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 74 no. 2 (2000), page 171-190.
Fulltext: 74_02_Quern-.pdf (145.85KB)

Isi artikel

This study proposes that the lexical-semantic capacities of the right hemisphere (RH) are underestimated in normal subjects and reexamines them in a ‘‘dynamic model’’ framework. As expected, overloading the left hemisphere by combining a lexical-decision task presented in divided visual field with a concurrent heavy verbal memory load, and activating the RH by combining the lexical-decision task with a concurrent visuo-imaged memory load, lead to enhanced left visual field–RH lexical performance. The RH appears to support a larger lexical-semantic network than suggested in the literature, including representations for long and nonimageable words, and the accessibility threshold for the representations stored therein is modulated by hemispheric activation–inhibition mechanisms.

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