Poster Session E, Monday, March 25, 2:30 – 4:30 pm, Pacific Concourse
The organization of object concepts in modality specific brain association areas: A quantitative approach
skiker kaoutar1, Maouene Mounir1; 1Univerity of Abdelmalek Essaadi
In this paper, we propose a quantitative approach to describe how object concepts organize within modality specific association brain areas. Our approach builds on the idea that an object concept is distributed in different modality specific association areas as a collection of sensorimotor features learned through our experiences and interactions with objects (Lambon Ralph et al. 2017; Martin 2016). The data consists of familiar object concepts (eg. cat, table, car) from different semantic categories (eg. animal, tool, vehicle) and their corresponding sensory and motor features including visual, auditory, olfactory/gustatory, tactile and motor features. Within each modality, object concepts are organized as a network with two object concepts are linked if they share at least one feature in common. We suppose that, in each modality specific association brain area, object concepts are organized differently. We use graph measures including clustering coefficient, path length and efficiency to examine how object concepts organize in visual, auditory, motor, olfactory/gustatory and tactile modality specific association areas. Clustering coefficient indicates to what extend object concepts are connected with each other and path length traces the distances between them. Our results show that object concepts are connected in different ways in modality specific areas. Within the visual modality specific areas, object concepts are densely connected compared in other modalities indicated by high clustering coefficient. This approach allows to describe how object concepts organize in different modality specific brain areas and provides cognitive neuroscientists with a guideline in studying object concepts.
Topic Area: LONG-TERM MEMORY: Semantic