Contralateral neglect induced by right posterior parietal rTMS in healthy subjects

We applied repetitive transcranial magnetic stimulation (rTMS) in order to induce interference on visuo-spatial perception in 11 healthy subjects. Subjects performed a visuo-spatial task requiring judgements about the symmetry of prebisected lines. Visual stimuli consisted of symmetrically or asymme...

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Bibliographic Details
Published inNeuroreport Vol. 11; no. 7; p. 1519
Main Authors Fierro, B, Brighina, F, Oliveri, M, Piazza, A, La Bua, V, Buffa, D, Bisiach, E
Format Journal Article
LanguageEnglish
Published England 15.05.2000
Subjects
Adult
Aged
Agnosia - physiopathology
Electric Stimulation
Functional Laterality - physiology
Humans
Magnetics
Middle Aged
Parietal Lobe - physiology
Photic Stimulation
Psychomotor Performance - physiology
Space Perception - physiology
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Summary:We applied repetitive transcranial magnetic stimulation (rTMS) in order to induce interference on visuo-spatial perception in 11 healthy subjects. Subjects performed a visuo-spatial task requiring judgements about the symmetry of prebisected lines. Visual stimuli consisted of symmetrically or asymmetrically transected lines, tachystoscopically presented for 50 ms on a computer-monitor. Performance was examined in basal condition and during rTMS trains of 10 stimuli at 25 Hz, delivered through a focal coil over right or left posterior parietal cortex (P5 and P6 sites) and triggered synchronously with visual stimulus. Randomly intermixed sham rTMS trains were employed to control for non-specific effects. Right parietal rTMS induced a significant rightward bias in symmetry judgements as compared with basal and sham rTMS conditions. No differences emerged between other conditions.
ISSN:0959-4965
DOI:10.1097/00001756-200005150-00031