Perceptual Pseudoneglect in Schizophrenia: Candidate Endophenotype and the Role of the Right Parietal Cortex
| Autor: | Giuseppe Rociola, Bianca Pezzarossa, Valentina Magni, Alberto Siracusano, Cinzia Niolu, Michele Ribolsi, Giorgio Di Lorenzo, Giulia Lisi, Massimiliano Oliveri, Anna Saya, Giacomo Koch, Ivo Alex Rubino |
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| Přispěvatelé: | Ribolsi, M, Lisi, G, Di Lorenzo, G, Koch, G, Oliveri, M, Magni, V, Pezzarossa, B, Saya, A, Rociola, G, Rubino, IA, Niolu, C, Siracusano, A |
| Rok vydání: | 2012 |
| Předmět: |
Adult
Male medicine.medical_specialty Endophenotypes Bisection medicine.medical_treatment Posterior parietal cortex Audiology Functional Laterality Lateralization of brain function NO Perceptual Disorders Young Adult schizophrenia brain stimulation Parietal Lobe medicine Humans Family Depressive Disorder Schizophrenia Case-Control Studies Schizophrenic Psychology Space Perception Middle Aged Female Settore MED/25 - Psichiatria Settore M-PSI/02 - Psicobiologia E Psicologia Fisiologica Transcranial direct-current stimulation Parietal lobe Regular Article medicine.disease Psychiatry and Mental health Endophenotype Laterality Psychology Cognitive psychology |
| Zdroj: | Schizophrenia Bulletin. 39:601-607 |
| ISSN: | 1745-1701 0586-7614 |
| DOI: | 10.1093/schbul/sbs036 |
| Popis: | Several contributions have reported an altered expression of pseudoneglect in psychiatric disorders, highlighting the existence of an anomalous brain lateralization in affected subjects. Surprisingly, no studies have yet investigated pseudoneglect in first-degree relatives (FdR) of psychiatric patients. We investigated performance on “paper and pencil” line bisection (LB) tasks in 68 schizophrenic patients (SCZ), 42 unaffected FdR, 41 unipolar depressive patients (UP), and 103 healthy subjects (HS). A subgroup of 20 SCZ and 16 HS underwent computerized LB and mental number line bisection (MNL) tasks requiring judgment of prebisected lines and numerical intervals. Moreover, we evaluated, in a subgroup of 15 SCZ, performance on LB and MNL before and after parietal transcranial direct current stimulation (tDCS). In comparison to HS and UP, SCZ showed a systematic rightward bias on LB, partially corrected by selective right posterior parietal tDCS. Interestingly, even FdR showed a lack of pseudoneglect on LB, expressing a mean error lying in the middle between those of HS and SCZ. On the other hand, our results showed no significant difference between the performance of SCZ and HS on MNL. Both groups showed a comparable leftward bias that could not be significantly altered after left or right parietal tDCS. These findings confirm the existence of reduced lateralization in SCZ, suggesting specific impaired functioning of the right parietal lobule. Notably, we report a lack of pseudoneglect not only in SCZ but also in FdR, raising the hypothesis that an inverted laterality pattern may be considered a concrete marker of schizotypal traits. |
| Databáze: | OpenAIRE |
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