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Erschienen in: The Cerebellum 3/2011

01.09.2011

Cerebellar Theta-Burst Stimulation Selectively Enhances Lexical Associative Priming

verfasst von: Giorgos P. Argyropoulos

Erschienen in: The Cerebellum | Ausgabe 3/2011

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Abstract

Recent research in cerebellar cognitive and linguistic functions makes plausible the idea that the cerebellum is involved in processing temporally contiguous linguistic input. In order to assess this hypothesis, a simple lexical decision task was constructed to study whether the effect of transcranial magnetic stimulation on two different cerebellar sites would have a selective impact on associative as opposed to semantic priming. This is the first experiment applying transcranial magnetic stimulation of the cerebellum to a linguistic task. The results show a selective drop in lexical decision accuracy after stimulation of a medial cerebellar site in the first session of participation. Most importantly, they also demonstrate a selective increase of associative priming sizes after stimulation of the same site that cannot be attributed to changes in sensorimotor performance or in accuracy rates. The finding is discussed within the context of domain-general associative cerebellar computations.
Fußnoten
1
As the reviewer correctly notes, a limitation in the design was that only unilateral (right) cerebellar stimulation was used, while laterality of limb responses (right-/left-hand index finger) was confounded with lexical decisions (“word”/“nonword” responses). The number of participants did not suffice to introduce further between-subjects variables to address these issues, and a more elaborate study with more experimental conditions would be required. As noted above, though, trials corresponding to “nonword” responses were all filler trials, and the primary focus of the study was on the speed and accuracy in different types of word–word trials. Furthermore, any motor-related disruptions induced by (right) cerebellar stimulation were expected to selectively affect performance in “word” responses, performed by the ipsilateral (right) index finger (see “Discussion” section).
 
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Metadaten
Titel
Cerebellar Theta-Burst Stimulation Selectively Enhances Lexical Associative Priming
verfasst von
Giorgos P. Argyropoulos
Publikationsdatum
01.09.2011
Verlag
Springer-Verlag
Erschienen in
The Cerebellum / Ausgabe 3/2011
Print ISSN: 1473-4222
Elektronische ISSN: 1473-4230
DOI
https://doi.org/10.1007/s12311-011-0269-y

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