The left visual-field advantage in rapid visual presentation is amplified rather than reduced by posterior-parietal rTMS.
In the present task, series of visual stimuli are rapidly presented left and right, containing two target stimuli, T1 and T2. In previous studies, T2 was better identified in the left than in the right visual field. This advantage of the left visual field might reflect dominance exerted by the right over the left hemisphere. If so, then repetitive transcranial magnetic stimulation (rTMS) to the right parietal cortex might release the left hemisphere from right-hemispheric control, thereby improving T2 identification in the right visual field. Alternatively or additionally, the asymmetry in T2 identification might reflect capacity limitations of the left hemisphere, which might be aggravated by rTMS to the left parietal cortex. Therefore, rTMS pulses were applied during each trial, beginning simultaneously with T1 presentation. rTMS was directed either to P4 or to P3 (right or left parietal cortex) either as effective or as sham stimulation. In two experiments, either one of these two factors, hemisphere and effectiveness of rTMS, was varied within or between participants. Again, T2 was much better identified in the left than in the right visual field. This advantage of the left visual field was indeed modified by rTMS, being further increased by rTMS to the left hemisphere rather than being reduced by rTMS to the right. It may be concluded that superiority of the right hemisphere in this task implies that this hemisphere is less irritable by external interference than the left hemisphere.
Verleger
Rolf
R
Department of Neurology, University of Lübeck, 23538, Lübeck, Germany. rolf.verleger@neuro.uni-Luebeck.de
Möller
Friderike
F
Kuniecki
Michał
M
Smigasiewicz
Kamila
K
Groppa
Sergiu
S
Siebner
Hartwig R
HR
D000328:Adult; D000704:Analysis of Variance; D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D010296:Parietal Lobe / Q000502:physiology*; D010775:Photic Stimulation; D011597:Psychomotor Performance / Q000502:physiology; D011930:Reaction Time / Q000502:physiology; D050781:Transcranial Magnetic Stimulation / Q000379:methods; D014794:Visual Fields / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*
Psychol Sci. 2002 Sep;13(5):416-24
12219807
Cereb Cortex. 2007 Jun;17(6):1486-92
16923778
J Cogn Neurosci. 2009 Sep;21(9):1782-9
18823232
J Neurosci. 2007 Oct 17;27(42):11271-8
17942721
Exp Brain Res. 2005 Jan;160(4):510-6
15480601
Neuropsychologia. 1983;21(6):633-9
6664482
Cognition. 2001 Apr;79(1-2):39-88
11164023
Neuropsychologia. 1971 Mar;9(1):97-113
5146491
Brain Res. 2006 Jun 30;1097(1):149-55
16764838
J Cogn Neurosci. 2007 Mar;19(3):513-24
17335398
J Neurosci. 1993 Mar;13(3):1202-26
8441008
Eur J Neurosci. 2009 Mar;29(6):1271-6
19302162
Psychol Bull. 1994 Sep;116(2):220-44
7972591
J Cogn Neurosci. 2008 May;20(5):916-26
18201128
J Cogn Neurosci. 2009 Mar;21(3):474-88
18564053
Nat Neurosci. 2001 Sep;4(9):953-7
11528429
Exp Brain Res. 2007 Nov;183(3):329-39
17643233
Exp Brain Res. 2003 Jan;148(1):1-16
12478392
Psychophysiology. 1993 Nov;30(6):547-58
8248447
J Neurophysiol. 2006 May;95(5):3277-80
16436477
Nat Neurosci. 2001 Jun;4(6):656-61
11369949
Brain Res. 2008 Nov 25;1242:191-9
18304520
J Exp Psychol Gen. 1979 Jun;108(2):251-79
528905
J Int Neuropsychol Soc. 2005 May;11(3):263-72
15892902
J Exp Psychol Hum Percept Perform. 2007 Apr;33(2):298-329
17469970
Brain. 1997 Mar;120 ( Pt 3):515-33
9126062
Eur J Neurosci. 2005 May;21(9):2563-74
15932614
Neuroimage. 2007 Apr 15;35(3):1247-55
17336097
Neuropsychologia. 2006;44(6):987-1006
16300805
Nat Neurosci. 2004 Mar;7(3):217-8
14983182
Neuropsychologia. 2010 Aug;48(10):2852-60
20546763
J Cogn Neurosci. 2009 Oct;21(10):1946-55
18855545
Neuropsychologia. 1979;17(6):653-60
522979
Neuropsychologia. 2005;43(1):35-40
15488903
J Cogn Neurosci. 2009 Feb;21(2):207-21
18823235