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  Are recognition deficits following occipital lobe TMS explained by raised detection thresholds?

Kammer, T., & Nusseck, H.-G. (1998). Are recognition deficits following occipital lobe TMS explained by raised detection thresholds? Neuropsychologia, 36(11), 1161-1166. doi:10.1016/S0028-3932(98)00003-7.

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Kammer, T1, 2, 3, Autor           
Nusseck, H-G1, 3, Autor           
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497800              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Zusammenfassung: It is known that transcranial magnetic stimulation (TMS) administered over the occipital pole suppresses recognition of visual objects. Our aim
was to ascertain whether this suppression can be interpreted as a change in visual contrast threshold. Four subjects detected the orientation of an U- shaped
hook flashed for 21 ms. Under control conditions, mean contrast threshold was found at 0.88 log units Weber contrast. Thresholds were raised if TMS was
applied 40-200 ms after the visual stimulus. Maximum elevation was 1.67 log units under TMS at 120 ms stimulus onset asynchrony. This phenomenon can
be interpreted as a reduction in signal-to-noise ratio of the visual stimuli by TMS, which can be compensated for by increasing the contrast of the stimuli.
(C) 1998 Elsevier Science Ltd. All rights reserved.

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 Datum: 1998-11
 Publikationsstatus: Erschienen
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 Identifikatoren: BibTex Citekey: 238
DOI: 10.1016/S0028-3932(98)00003-7
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Titel: Neuropsychologia
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Oxford : Pergamon
Seiten: - Band / Heft: 36 (11) Artikelnummer: - Start- / Endseite: 1161 - 1166 Identifikator: ISSN: 0028-3932
CoNE: https://pure.mpg.de/cone/journals/resource/954925428258