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

Kammer, T; Nusseck, H-G

doi:10.1016/S0028-3932(98)00003-7

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

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Kammer, T
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Former Department Comparative Neurobiology, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Nusseck, H-G
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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引用

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.

引用: https://hdl.handle.net/11858/00-001M-0000-0013-E903-6

要旨

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.