Revealing the Semantic Association between Perception of Scenes and Significant Objects by Representational...

Area of Science:

• Neuroscience
• Cognitive Science
• Visual Perception

Background:

• Significant objects are crucial for scene recognition.
• The lateral occipital complex (LOC), parahippocampal place area (PPA), and retrosplenial cortex (RSC) are implicated in object and scene processing.
• The precise neural mechanisms linking objects and scenes remain unclear.

Purpose of the Study:

• To investigate the neural mechanisms underlying the association between objects and scenes in human brain.
• To explore the roles of LOC, PPA, and RSC in processing object-scene relationships.
• To differentiate the contributions of these regions to semantic and spatial aspects of scene recognition.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was employed to measure brain activity.
• Representational Similarity Analysis (RSA) was used to compare activity patterns for objects and scenes.
• Stimuli included four categories of scene images and four types of significant objects.

Main Results:

• Positive correlations between object and scene activity patterns were observed in the LOC and PPA.
• Within-scene objects showed stronger correlations than out-of-scene objects in the PPA, LO, and PF.
• Scene-object correlations varied for indoor and outdoor scenes, with LO and PF processing semantic associations and PPA handling semantic and spatial characteristics.

Conclusions:

• The LOC and PPA are involved in integrating object information within scene context.
• The PPA, LO, and PF exhibit distinct roles in processing semantic and spatial scene properties.
• The RSC does not appear to be involved in processing semantic associations between scenes and objects.