TY  - JOUR
A1  - Smaczny, Stefan
A1  - Sperber, Christoph
A1  - Jung, Stefanie
A1  - Moeller, Korbinian
A1  - Karnath, Hans-Otto
A1  - Klein, Elise
T1  - Disconnection in a left-hemispheric temporo-parietal network impairs multiplication fact retrieval
T2  - NeuroImage
N2  - Arithmetic fact retrieval has been suggested to recruit a left-lateralized network comprising perisylvian language areas, parietal areas such as the angular gyrus (AG), and non-neocortical structures such as the hippocampus. However, the underlying white matter connectivity of these areas has not been evaluated systematically so far. Using simple multiplication problems, we evaluated how disconnections in parietal brain areas affected arithmetic fact retrieval following stroke. We derived disconnectivity measures by jointly considering data from n = 73 patients with acute unilateral lesions in either hemisphere and a white-matter tractography atlas (HCP-842) using the Lesion Quantification Toolbox (LQT). Whole-brain voxel-based analysis indicated a left-hemispheric cluster of white matter fibers connecting the AG and superior temporal areas to be associated with a fact retrieval deficit. Subsequent analyses of direct gray-to-gray matter disconnections revealed that disconnections of additional left-hemispheric areas (e.g., between the superior temporal gyrus and parietal areas) were significantly associated with the observed fact retrieval deficit. Results imply that disconnections of parietal areas (i.e., the AG) with language-related areas (i.e., superior and middle temporal gyri) seem specifically detrimental to arithmetic fact retrieval. This suggests that arithmetic fact retrieval recruits a widespread left-hemispheric network and emphasizes the relevance of white matter connectivity for number processing.
KW  - disconnectome
KW  - VLSM
KW  - arithmetic fact retrieval
KW  - lesion mapping
KW  - connectivity
KW  - Hemisphäre <Anatomie>
KW  - Linke Hemisphäre
KW  - Hirnareal
KW  - Gyrus temporalis
KW  - Schlaganfall
KW  - Läsion
KW  - Substantia alba
Y1  - 2023
UR  - https://hst.opus.hbz-nrw.de/frontdoor/index/index/docId/236
UR  - https://nbn-resolving.org/urn:nbn:de:hbz:tr5-2360
VL  - 268 (2023)
SP  - 1
EP  - 12
PB  - Elsevier
ER  -