Abstract
Humans process the meaning of the world via both verbal and nonverbal modalities. It has been established that widely distributed cortical regions are involved in semantic processing, yet the global wiring pattern of this brain system has not been considered in the current neurocognitive semantic models. We review evidence from the brain-network perspective, which shows that the semantic system is topologically segregated into three brain modules. Revisiting previous region-based evidence in light of these new network findings, we postulate that these three modules support multimodal experiential representation, language-supported representation, and semantic control. A tri-network neurocognitive model of semantic processing is proposed, which generates new hypotheses regarding the network basis of different types of semantic processes.
Highlights
Humans process the meaning of the world via both verbal and nonverbal modalities
One may know about Beijing by being there and experiencing it. These approaches of gaining knowledge about Beijing roughly correspond to two types of proposals about how semantic memory is developed and organized: one is based on experiences of various specific attributes, and the other is based on rich information supported by language, such as, word associations, word orders, and syntactic structures
Language is often considered as a processing modality in parallel to these modalities rather than as a system that makes special contributions to semantic representation (Patterson et al, 2007; Lambon Ralph et al, 2016)
Summary
Humans process the meaning of the world via both verbal and nonverbal modalities. It has been established that widely distributed cortical regions are involved in semantic processing, yet the global wiring pattern of this brain system has not been considered in the current neurocognitive semantic models.
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