Bihemispheric Navigated Transcranial Magnetic Stimulation Mapping for Action Naming Compared to Object Naming in Sentence Context

Preoperative language mapping with navigated transcranial magnetic stimulation (nTMS) is currently based on the disruption of performance during object naming. The resulting cortical language maps, however, lack accuracy when compared to intraoperative mapping. The question arises whether nTMS resul...

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Bibliographic Details
Published in:Brain sciences 2021-09, Vol.11 (9), p.1190
Main Authors: Ohlerth, Ann-Katrin, Bastiaanse, Roelien, Negwer, Chiara, Sollmann, Nico, Schramm, Severin, Schröder, Axel, Krieg, Sandro M.
Format: Article
Language:English
Subjects:
action naming
bihemispheric
Brain research
Context
Error analysis
German language
Hemispheric laterality
Language
language mapping
Lexical semantics
Linguistics
Magnetic fields
Magnetic resonance imaging
Mapping
Naming
navigated transcranial magnetic stimulation
object naming
Phonology
picture naming
Postcentral gyrus
Semantics
Superior temporal gyrus
Temporal gyrus
Transcranial magnetic stimulation
Verbs
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Summary:Preoperative language mapping with navigated transcranial magnetic stimulation (nTMS) is currently based on the disruption of performance during object naming. The resulting cortical language maps, however, lack accuracy when compared to intraoperative mapping. The question arises whether nTMS results can be improved, when another language task is considered, involving verb retrieval in sentence context. Twenty healthy German speakers were tested with object naming and a novel action naming task during nTMS language mapping. Error rates and categories in both hemispheres were compared. Action naming showed a significantly higher error rate than object naming in both hemispheres. Error category comparison revealed that this discrepancy stems from more lexico-semantic errors during action naming, indicating lexico-semantic retrieval of the verb being more affected than noun retrieval. In an area-wise comparison, higher error rates surfaced in multiple right-hemisphere areas, but only trends in the left ventral postcentral gyrus and middle superior temporal gyrus. Hesitation errors contributed significantly to the error count, but did not dull the mapping results. Inclusion of action naming coupled with a detailed error analysis may be favorable for nTMS mapping and ultimately improve accuracy in preoperative planning. Moreover, the results stress the recruitment of both left- and right-hemispheric areas during naming.
ISSN:2076-3425
2076-3425
DOI:10.3390/brainsci11091190