Separate neural systems support representations for actions and objects during narrative speech in post-stroke aphasia.

ABSTRACT:

Background

Representations of objects and actions in everyday speech are usually materialized as nouns and verbs, two grammatical classes that constitute the core elements of language. Given their very distinct roles in singling out objects (nouns) or referring to transformative actions (verbs), they likely rely on distinct brain circuits.

Method

We tested this hypothesis by conducting network-based lesion-symptom mapping in 38 patients with chronic stroke to the left hemisphere. We reconstructed the individual brain connectomes from probabilistic tractography applied to magnetic resonance imaging and obtained measures of production of words referring to objects and actions from narrative discourse elicited by picture naming tasks.

Results

Words for actions were assoc

SUBMITTER: Gleichgerrcht E 

PROVIDER: S-EPMC4683458 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature