Effects of right parietal transcranial magnetic stimulation on object identification and orientation judgments

Irina M. Harris, Claire T. Benito, Manuela Ruzzoli, Carlo Miniussi

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We investigated the role played by the right parietal lobe in object identification and the ability to interpret object orientation, using transcranial magnetic stimulation (TMS) to momentarily interfere with ongoing cortical activity. Short trains of TMS pulses (12 Hz) were applied to a site overlying the right intraparietal sulcus/inferior parietal lobe while subjects performed either object identification tasks (i.e., picture-word verification and categorizing objects as natural or manufactured) or object orientation judgment tasks (i.e., picture-arrow verification and deciding whether an object was rotated clockwise or counterclockwise). Across different tasks, right parietal TMS impaired orientation judgments, but facilitated object identification, compared to TMS applied to a brain vertex control site. These complementary findings demonstrate that the right parietal lobe - a region belonging to the dorsal visual stream - is critical for processing the spatial attributes of objects, but not their identity. The observed improvement in object recognition, however, suggests an indirect role for the right parietal lobe in object recognition. We propose that this involves the creation of a spatial reference frame for the object, which allows interaction with the object and the individuation of specific viewing instances.

Original languageEnglish
Pages (from-to)916-926
Number of pages11
JournalJournal of Cognitive Neuroscience
Volume20
Issue number5
DOIs
Publication statusPublished - May 2008

Fingerprint

Parietal Lobe
Transcranial Magnetic Stimulation
Individuation
Aptitude
Identification (Psychology)
Brain

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

Cite this

Effects of right parietal transcranial magnetic stimulation on object identification and orientation judgments. / Harris, Irina M.; Benito, Claire T.; Ruzzoli, Manuela; Miniussi, Carlo.

In: Journal of Cognitive Neuroscience, Vol. 20, No. 5, 05.2008, p. 916-926.

Research output: Contribution to journalArticle

Harris, Irina M. ; Benito, Claire T. ; Ruzzoli, Manuela ; Miniussi, Carlo. / Effects of right parietal transcranial magnetic stimulation on object identification and orientation judgments. In: Journal of Cognitive Neuroscience. 2008 ; Vol. 20, No. 5. pp. 916-926.
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