Exploring the neural correlates of the reversed letter effect: Evidence from left and right parietal patients

Giuseppa Renata Mangano, Lisa Cipolotti, Patrizia Turriziani, Isabella Giammusso, Daniela Smirni, Li Zhaoping, Martina Bracco, Massimiliano Oliveri

Research output: Contribution to journalArticle

Abstract

To investigate the hemispheric lateralization of attentional processes during visual search tasks depending on the stimulus material embedding the target, twelve patients with unilateral left (n = 7) or right (n = 5) parietal lesions and 20 age and education matched healthy controls (HC) were recruited. We used a visual search task for a uniquely tilted oblique bar embedded in an object shape ‘N’ or in its mirror reversal ‘И’. The accuracy and the averaged reaction times (RTs) in each stimulus type (’N’ or ‘И’) were analysed. HC presented significantly longer RTs when the target bar was embedded in ‘N’ among its mirror reversed ‘И’ (p <.05). This “reversed letter effect” was also found in the right parietal patients (p <.001), while no evidence of a reversed letter effect was found in the left parietal patients.

Original languageEnglish
Pages (from-to)217-224
Number of pages8
JournalNeuroscience Letters
Volume699
DOIs
Publication statusPublished - Apr 23 2019

Keywords

  • Parietal cortex
  • Top-down attention
  • Visual search asymmetries

ASJC Scopus subject areas

  • Neuroscience(all)

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    Mangano, G. R., Cipolotti, L., Turriziani, P., Giammusso, I., Smirni, D., Zhaoping, L., Bracco, M., & Oliveri, M. (2019). Exploring the neural correlates of the reversed letter effect: Evidence from left and right parietal patients. Neuroscience Letters, 699, 217-224. https://doi.org/10.1016/j.neulet.2019.02.017