Using Multivariate Pattern Analysis to Identify Conceptual Knowledge Representation in the Brain

摘要: concepts is restricted to the language-dominant hemisphere, while concrete rely on both hemispheres because image-based system known be bilateral (Paivio, 1986). Although some neuroimaging studies use hemispherical asymmetry as a criterion of involvement mental imagery process (e.g., Binder, et al., 2005), laterality image generation has been controversial. Compared listening passively abstract words, imagining appearance objects when nouns were aurally presented was found activate inferior temporal lobe, premotor area and anterior cingulate gyrus in left hemisphere (D'Esposito 1997). Based current understanding neural machineries for object representation (Ganis, Thompson, & Kosslyn, 2004; Ganis, 2001), simply using hemispheric argued lack specificity (Scott, 2004). Similarly, different have offered explanations predictions context-availability from view. Some emphasize difference strength association with context between concepts. For example, Binder al. (2005) stated that according availability hypothesis, substrates are identical, activations correlating stronger than those Other accessibility context, or retrieval difficulty. Fiebach Friederici (2004) interpreted its prediction activity words brain regions associated semantic information, mainly posterior superior region. The correspondence early