Open AccessGesturing tool use and tool transport actions modulates inferior parietal functional connectivity with the dorsal and ventral object processing pathways
Author(s) -
Garcea Frank E.,
Buxbaum Laurel J.
Publication year - 2019
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.24565
Subject(s) - neuroscience , intraparietal sulcus , inferior parietal lobule , psychology , visual system , dorsum , supramarginal gyrus , posterior parietal cortex , functional magnetic resonance imaging , anatomy , biology , visual cortex
Interacting with manipulable objects (tools) requires the integration of diverse computations supported by anatomically remote regions. Previous functional neuroimaging research has demonstrated the left supramarginal (SMG) exhibits functional connectivity to both ventral and dorsal pathways, supporting the integration of ventrally‐mediated tool properties and conceptual knowledge with dorsally‐computed volumetric and structural representations of tools. This architecture affords us the opportunity to test whether interactions between the left SMG, ventral visual pathway, and dorsal visual pathway are differentially modulated when participants plan and generate tool‐directed gestures emphasizing functional manipulation (tool use gesturing) or structure‐based grasping (tool transport gesturing). We found that functional connectivity between the left SMG, ventral temporal cortex (bilateral fusiform gyri), and dorsal visual pathway (left superior parietal lobule/posterior intraparietal sulcus) was maximal for tool transport planning and gesturing, whereas functional connectivity between the left SMG, left ventral anterior temporal lobe, and left frontal operculum was maximal for tool use planning and gesturing. These results demonstrate that functional connectivity to the left SMG is differentially modulated by tool use and tool transport gesturing, suggesting that distinct tool features computed by the two object processing pathways are integrated in the parietal lobe in the service of tool‐directed action.