An inside-out theory of attention

Area of Science:

• Neuroscience
• Cognitive Psychology
• Brain Sciences

Background:

• The brain possesses distinct attentional systems for intrapersonal (internal) and extrapersonal (external) space.
• These systems evolved from hemispheral neural networks originally dedicated to attending to contralateral extrapersonal space.

Purpose of the Study:

• To propose a novel conceptualization of attention explaining hemispheral dominance and related neurological phenomena.
• To provide a coherent framework for understanding clinical hemineglect, anosognosia, and imagery.

Main Methods:

• Conceptual analysis of existing neurological and cognitive theories.
• Integration of findings on brain lateralization and language evolution.
• Theoretical modeling of attentional system development.

Main Results:

• Attention is organized into two systems: intrapersonal and extrapersonal.
• Language development necessitated the specialization of one hemisphere for intrapersonal attention.
• This specialization explains why the left hemisphere attends to right extrapersonal space, while the right attends to both.
• The model accounts for phenomena like hemineglect, anosognosia, and imagery.

Conclusions:

• The proposed dual-system model of attention offers a unified explanation for hemispheric specialization in attention.
• This framework clarifies the neural basis of spatial attention, hemineglect, and related disorders.
• Understanding these attentional systems is crucial for advancing cognitive neuroscience and clinical neurology.