Affordance processing in segregated parieto-frontal dorsal stream sub-pathways.

Area of Science:

• Cognitive Neuroscience
• Neuroscience
• Psychology

Background:

• Affordances represent 'action possibilities' derived from object properties and environmental context.
• These action possibilities link perception and action through sensory-motor processes during goal-directed interactions.
• A distinction exists between stable affordances (invariant features) and variable affordances (context-dependent features).

Purpose of the Study:

• To identify consistent anatomical correlates for stable and variable affordances using a coordinate-based meta-analysis.
• To investigate the neural basis of differentiated affordances.
• To explore the functional pathways associated with object interaction.

Main Methods:

• Coordinate-based meta-analysis of functional neuroimaging studies on object interaction.
• Synthesis of data from studies investigating stable and variable affordances.
• Identification of overlapping and distinct brain networks.

Main Results:

• Two parallel, partially overlapping functional pathways were identified for processing affordances.
• Stable affordances are associated with the left inferior parietal and frontal cortices within the ventro-dorsal stream.
• Variable affordances are preferentially localized in the dorso-dorsal stream, suggesting adaptation to changing object properties.

Conclusions:

• The findings support a model of differentiated affordances with distinct neural underpinnings.
• Stable affordances rely on knowledge of invariant object features, processed in the ventro-dorsal pathway.
• Variable affordances involve adaptation to dynamic object properties, processed in the dorso-dorsal pathway.