Hemispheric co-lateralization of language and spatial attention reduces performance in dual-task

Hemispheric specialization of different functions is proposed to confer evolutionary benefits, yet the behavioral impacts of lateralization and its cognitive and neural mechanisms remain unclear. This study investigated the effect of lateralization pattern between language and spatial attention on dual-task performance and its association with callosal connectivity. Functional lateralization was assessed using fMRI verbal fluency and landmark tasks, and interhemispheric connections were evaluated through diffusion-weighted imaging. The typical lateralization pattern enhanced overall performance and reduced interference in dual-task compared to the co-lateralized pattern (both functions lateralized to one hemisphere). However, no differences were observed between the mirrored pattern (right language dominance and left attention dominance) and the co-lateralized pattern. While callosal connectivity did not significantly differ among groups, a negative correlation was observed between the lateralization degree and callosal connectivity. Our findings partially support the functional crowding hypothesis and offer insights into neurocognitive mechanisms underlying functional reorganization after brain lesions

Cognitive psychology · Dual (grammatical number) · Laterality · Lateralization of brain function · Linguistics · Task (project management) · Hemispheric Asymmetry in Neuroscience · Motor Control and Adaptation · Neuroscience · Psychology · Spatial Neglect and Hemispheric Dysfunction

• Control of goal-directed and stimulus-driven attention in the brain

  Open Access•Maurizio Corbetta, Gordon L Shulman•Nature Reviews Neuroscience•2002

  Incluir item

• Working Memory

  Open Access•Alan Baddeley•Science•1992

  Incluir item

• A consensus guide to capturing the ability to inhibit actions and impulsive behaviors in the stop-signal task

  Open Access•Frederick Verbruggen, Adam R Aron et al.•eLife•2019

  Incluir item

• Population-Level Right Handedness for a Coordinated Bimanual Task in Chimpanzees

  Open Access•William D Hopkins, Michelle Hook et al.•International Journal of…•2003

  Incluir item

• Multimodal mapping of the face connectome

  Open Access•Yin Wang, Athanasia Metoki et al.•Nature Human Behaviour•2020

  Incluir item