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

doi:10.1016/j.neulet.2019.02.017

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

Fondazione Santa Lucia

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	217-224
Number of pages	8
Journal	Neuroscience Letters
Volume	699
DOIs	https://doi.org/10.1016/j.neulet.2019.02.017
Publication status	Published - 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

Exploring the neural correlates of the reversed letter effect : Evidence from left and right parietal patients. / Mangano, Giuseppa Renata; Cipolotti, Lisa; Turriziani, Patrizia; Giammusso, Isabella; Smirni, Daniela; Zhaoping, Li; Bracco, Martina; Oliveri, Massimiliano.

In: Neuroscience Letters, Vol. 699, 23.04.2019, p. 217-224.

Research output: Contribution to journal › Article

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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 {\textquoteleft}N{\textquoteright} or in its mirror reversal {\textquoteleft}И{\textquoteright}. The accuracy and the averaged reaction times (RTs) in each stimulus type ({\textquoteright}N{\textquoteright} or {\textquoteleft}И{\textquoteright}) were analysed. HC presented significantly longer RTs when the target bar was embedded in {\textquoteleft}N{\textquoteright} among its mirror reversed {\textquoteleft}И{\textquoteright} (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.",

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