Emotionally negative stimuli can overcome attentional deficits in patients with visuo-spatial hemineglect

Anna Grabowska , Artur Marchewka , Joanna Seniów , Katarzyna Polanowska , Katarzyna Jednoróg , Leszek Królicki , Małgorzata Kossut , A. Członkowska

Abstract

Left unilateral spatial neglect resulting from right brain damage is characterized by loss of awareness for stimuli in the contralesional side of space, despite intact visual pathways. We examined using fMRI whether patients with neglect are more likely to consciously detect in the neglected hemifield, emotionallynegative complex scenes rather than visually similar neutral pictures and if so, what neural mechanisms mediate this effect. Photographs of emotional and neutral scenes taken from the IAPS were presented in a divided visual field paradigm. As expected, the detection rate for emotional stimuli presented in the neglected field was higher than for neutral ones. Successful detection of emotional scenes as opposed to neutral stimuli in the left visual field (LVF) produced activations in the parahippocampal and anterior cingulate areas in the right hemisphere. Detection of emotional stimuli presented in the intact right visual field (RVF) activated a distributed network of structures in the left hemisphere, including anterior and posterior cingulate cortex, insula, as well as visual striate and extrastriate areas. LVF-RVF contrasts for emotional stimuli revealed activations in right and left attention related prefrontal areas whereas RVF-LVF comparison showed activations in the posterior cingulate and extrastriate visual cortex in the left hemisphere. An additional analysis contrasting detected vs. undetected emotional LVF stimuli showed involvement of left anterior cingulate, right frontal and extrastriate areas. We hypothesize that beneficial role of emotion in overcoming neglect is achieved by activation of frontal and limbic lobe networks, which provide a privileged access of emotional stimuli to attention by top-down modulation of processing in the higher-order extrastriate visual areas. Our results point to the importance of top-down regulatory role of the frontal attentional systems, which might enhance visual activations and lead to greater salience of emotional stimuli for perceptual awareness
Author Anna Grabowska (Wydział Psychologii)
Anna Grabowska,,
- Wydział Psychologii
, Artur Marchewka (Wydział Psychologii)
Artur Marchewka,,
- Wydział Psychologii
, Joanna Seniów (Wydział Psychologii)
Joanna Seniów,,
- Wydział Psychologii
, Katarzyna Polanowska
Katarzyna Polanowska,,
-
, Katarzyna Jednoróg
Katarzyna Jednoróg,,
-
, Leszek Królicki
Leszek Królicki,,
-
, Małgorzata Kossut
Małgorzata Kossut,,
-
, A. Członkowska
A. Członkowska,,
-
Journal seriesNeuropsychologia, ISSN 0028-3932, (A 40 pkt)
Issue year2011
Vol49 (12)
Pages3327-3337
Publication size in sheets0
Languageen angielski
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Emotionally-negative-stimuli-can-overcome-attentional-deficits-in-patients-with-visuo-spatial-hemineglect-.pdf of 14-09-2015
554.4 KB
Score (nominal)40
Citation count*
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Dorobek Naukowy - Preview URLhttp://dn.swps.edu.pl/Podglad.aspx?WpisID=8506
Dorobek Naukowy - Approve URLhttp://dn.swps.edu.pl/Biuro/ZatwierdzanieWpisu.aspx?WpisID=8506
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* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
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