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Brain Sciences
Special Issues
Novel Understandings in Visual Awareness and Spatial Neglect
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Novel Understandings in Visual Awareness and Spatial Neglect

A special issue of Brain Sciences (ISSN 2076-3425). This special issue belongs to the section "Neuropsychology".

Deadline for manuscript submissions: closed (31 August 2022) | Viewed by 6585

Special Issue Editors

Dr. Stefano Lasaponara

E-Mail Website
Guest Editor
1. Dipartimento di Psicologia, Università degli Studi di Roma “La Sapienza”, Via dei Marsi 78, 00185 Roma, Italy
2. Fondazione Santa Lucia, Centro Ricerche di Neuropsicologia, IRCCS, Via Ardeatina 306, 00179 Roma, Italy
Interests: neuropsychology; attention; brain damage; rehabilitation; affective; social neuroscience; electrophysiology; reinforcement learning; conscious perception
Special Issues, Collections and Topics in MDPI journals
Dr. Francesco Tomaiuolo

E-Mail Website
Co-Guest Editor
Dipartimento di Medicina Clinica e Sperimentale, Università degli Studi di Messina, Messina, Italy
Interests: neuroanatomy; connectome; neuropsychology

Special Issue Information

Dear Colleagues,

It is well established that lesions to the right brain hemisphere (RBD), usually led to the inability of attending the contralesional space, i.e. unilateral spatial neglect (USN). Neglect implies longer rehabilitation treatment and poorer functional outcome. This has two main negative effects: the reduction in the quality of life of these patients and the enhancement in the duration and costs of therapeutic intervention. Despite these crucial issues, the understanding of mechanism behind this syndrome is still a matter of debate, with theories involving attention circuits, neural spatial representations, interhemispheric balance and others.

This Special Issue of Brain Sciences aims to present a collection of studies detailing the most recent advancements in the field of spatial neglect. Authors are invited to submit cutting-edge research and reviews that address a broad range of topics related to USN and visual awareness, including the following: neuroimaging and electrophysiological correlates of USN, screening, early diagnosis, evidence-based intervention and rehabilitation.

Dr. Stefano Lasaponara
Guest Editor

Dr. Francesco Tomaiuolo
Co-Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Brain Sciences is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • spatial neglect
  • attention
  • visual awareness
  • brain lesion
  • rehabilitation

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Published Papers (2 papers)

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Research

10 pages, 5886 KiB  
Article
Splenial Callosal Disconnection in Right Hemianopic Patients Induces Right Visual-Spatial Neglect
by Francesco Tomaiuolo, Giovanni Raffa, Serena Campana, Giada Garufi, Stefano Lasaponara, Loredana Voci, Salvatore M. Cardali, Antonino Germanò, Fabrizio Doricchi and Michael Petrides
Brain Sci. 2022, 12(5), 640; https://doi.org/10.3390/brainsci12050640 - 12 May 2022
Cited by 2 | Viewed by 2264
Abstract
Posterior cerebral artery (PCA) territory infarction involving occipital cortical damage can give rise to contralateral homonymous hemianopia. Here, we report two rare cases of patients with lesions in the left hemisphere PCA territory who developed right visuo-spatial neglect. One patient suffered right hemianopia [...] Read more.
Posterior cerebral artery (PCA) territory infarction involving occipital cortical damage can give rise to contralateral homonymous hemianopia. Here, we report two rare cases of patients with lesions in the left hemisphere PCA territory who developed right visuo-spatial neglect. One patient suffered right hemianopia and right visuo-spatial neglect after a stroke that damaged the left primary visual cortex and the callosal splenial fibers. The other unique case is of a patient who had a brain tumor in the posterior cerebral region in the left hemisphere and initially exhibited only right hemianopia that developed into right visuo-spatial neglect after tumor resection that included the splenial fibers. These cases indicate that, as in cases with damage in the right PCA territory, lesions in the left PCA yield visuo-spatial neglect when the damage produces contralateral hemianopia and concomitant disconnection of the splenium of the corpus callosum, which interferes with the arrival of visual inputs from the intact right to the lesioned left hemisphere. These results also emphasize the necessity of sparing the splenial fibers in surgical interventions in patients who exhibit hemianopia. Full article
(This article belongs to the Special Issue Novel Understandings in Visual Awareness and Spatial Neglect)
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20 pages, 5118 KiB  
Article
The Neural Responses of Visual Complexity in the Oddball Paradigm: An ERP Study
by Rui Hu, Liqun Zhang, Pu Meng, Xin Meng and Minghan Weng
Brain Sci. 2022, 12(4), 447; https://doi.org/10.3390/brainsci12040447 - 27 Mar 2022
Cited by 8 | Viewed by 3747
Abstract
This research measured human neural responses to images of different visual complexity levels using the oddball paradigm to explore the neurocognitive responses of complexity perception in visual processing. In the task, 24 participants (12 females) were required to react to images with high [...] Read more.
This research measured human neural responses to images of different visual complexity levels using the oddball paradigm to explore the neurocognitive responses of complexity perception in visual processing. In the task, 24 participants (12 females) were required to react to images with high complexity for all stimuli. We hypothesized that high-complexity stimuli would induce early visual and attentional processing effects and may elicit the visual mismatch negativity responses and the emergence of error-related negativity. Our results showed that the amplitude of P1 and N1 were unaffected by complexity in the early visual processing. Under the target stimuli, both N2 and P3b components were reported, suggesting that the N2 component was sensitive to the complexity deviation, and the attentional processing related to complexity may be derived from the occipital zone according to the feature of the P3b component. In addition, compared with the low-complexity stimulus, the high-complexity stimulus aroused a larger amplitude of the visual mismatch negativity. The detected error negativity (Ne) component reflected the error detection of the participants’ mismatch between visual complexity and psychological expectations. Full article
(This article belongs to the Special Issue Novel Understandings in Visual Awareness and Spatial Neglect)
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