Visual information processing in hemispatial neglect
Trends in Cognitive SciencesPublished 1 June 1997
Regina McGlinchey‐Berroth
Citations24
SJR quartileQ1
SJR score4.51
SNIP5.51
Generate an AI Snapshot to get a quick, structured summary of this paper.
Study Snapshot
ObjectiveStudy objective
MethodsResearch methodology
PopulationPopulation studied
Sample sizeSample sizes
OutcomesStudy outcomes here
ResultsStudy results comes here
LimitationsResearch study limitations comes here
A concise AI-generated summary of the paper will appear here once you click Generate AI Snapshot.
TL;DR
Evidence that a great deal of visual information processing does occur inemispatial neglect is presented and a new theoretical framework that may help to direct future research into uncovering the underlying mechanism(s) is suggested.
Abstract
Hemispatial neglect is a complex neuropsychological disorder characterized by a severe attentional deficit that produces a lack of awareness for information appearing in contralesional hemispace. Despite this lack of phenomenal awareness, recent studies suggest that a great deal of visual information processing does occur and can influence the performance of patients in certain tasks. The current review will present this evidence and suggest a new theoretical framework that may help to direct future research into uncovering the underlying mechanism(s).
Keywords
Neuroscience
Journal of NeuroscienceEffects of parietal injury on covert orienting of attention
2,196 Citations1984Mi Posner, JA Walker +2 more
The results show that damage to the parietal lobe produces a deficit in the disengage operation when the target is contralateral to the lesion, and suggest one mechanism of the effects of parietal lesions reported in clinical neurology.
Cognitive PsychologyConscious and unconscious perception: Experiments on visual masking and word recognition
1,395 Citations1983Anthony J. Marcel
It is proposed that central pattern masking has little effect on visual processing itself (while peripheral energy masking does), but affects availability of records of the results of those processes to consciousness, casting doubt on the paradigm assumption that representations yielded by perceptual analysis are identical to and directly reflected by phenomenal percepts.
Annals of NeurologyMechanisms underlying hemispatial neglect
865 Citations1979Kenneth M. Heilman, Edward Valenstein
If patients with left‐sided hemispatial neglect bisect lines incorrectly because hemianopia or sensory hemiinattention prevents them from seeing how far the line extends to the left, a strategy that ensures their seeing the left side of the line in their normal field should improve performance.
Medical Entomology and ZoologyBlindsight: A Case Study and Implications
774 Citations1986Lawrence Weiskrantz
The present study focuses on the development of a novel approach to discrimination of orientation within the scotoma of the optic disc, which is based on a direct comparison of the response of the orbiculares to light.
Advances in psychologyNeurophysiological and Neuropsychological Aspects of Spatial Neglect
721 Citations1987
In this volume, three aspects are examined: a) normal subjects, where new findings on spatial behavior are described, and brain-lesioned subjects,Where the classical studies on neglect are reconsidered in the light of new findings.
Journal of clinical and experimental neuropsychologyClinical neuropsychology: 1960-1990
641 Citations1992Arthur L. Benton
Neuropsychologists now require a deeper understanding of basic neuroscience and cognitive psychology than was true in the past and steps should be taken to insure that training to achieve that understanding is provided to the upcoming generation of neuropsychologists.
Canadian Journal of Psychology/Revue Canadienne de PsychologieDistinguishing conscious from unconscious perceptual processes.
608 Citations1986Jim Cheesman, Philip M. Merikle
Deux experiences avec une tâche d'amorce type stroop indiquent que les mots masques de couleur presentes au-dela and en-deca du seuil subjectif permettent d’amorcer l'identification verbale ulterieure de taches de Couleur.
NatureTime to understand pictures and words
498 Citations1975Mary C. Potter, Barbara A. Faulconer
Here it is confirmed that naming a drawing of an object takes much longer than reading its name, but it is shown that deciding whether the object is in a given category such as ‘furniture’ takes slightly less time for a drawing than for a word, a result that seems to be inconsistent with the second view.
BrainUNILATERAL SPATIAL NEGLECT AND RECOVERY FROM HEMIPLEGIA
464 Citations1982Gianfranco Denes, Carlo Semenza +2 more
After six months from onset, left hemiplegics show a lesser degree of improvement in independence and social adjustment coupled with a tendency to a poorer recovery of motor function than the corresponding group of right hemipLegics.
BrainUNILATERAL NEGLECT, REPRESENTATIONAL SCHEMA AND CONSCIOUSNESS
444 Citations1979Edoardo Bisiach, Claudio Luzzatti +1 more
Right brain-damaged patients with unilateral neglect were asked to detect differences within pairs of patterns moving left- or rightward behind a narrow vertical slit; it was seen that differences occurring on the left side of the mentally reconstructed images were less easily detected.
NeuropsychologiaThe effect of cueing on unilateral neglect
391 Citations1983M. Jane Riddoch, Glyn W. Humphreys
The results are interpreted as a failure of patients with unilateral neglect to orient automatically to the side of space contralateral to the lesion, though processes governing the conscious orienting of attention are intact.
Awareness of deficit after brain injury : clinical and theoretical issues
353 Citations1991George P. Prigatano, Daniel L. Schacter
This book discusses anosognosia, consciousness, and the self, as well as the role of psychological factors in disordered awareness, and three possible mechanisms of unawareness of deficit.
Journal of Cognitive NeuroscienceVisual Processing without Awareness: Evidence from Unilateral Neglect
307 Citations1992Anna Berti, Giacomo Rizzolatti
This finding suggests that patients with neglect are able to process stimuli presented to the neglected field to a categorical level of representation even when they deny the stimulus presence in the affected field.
NeurologyHemispatial neglect affected by non‐neglected stimuli
261 Citations1988Victor W. Mark, Carol A. Kooistra +1 more
The improved performance when lines were cancelled by removal instead of by marking them suggests that hemispatial neglect is influenced by the presence of stimuli in the non-neglected hemispace.
NatureInformation processing of visual stimuli in an ‘extinguished’ field
258 Citations1979Bruce T. Volpe, Joseph E. LeDoux +1 more
The following observations demonstrate that although the extinguished stimulus often goes completely unnoticed by the patient, the patients are able to utilise the extinguished stimuli in an interfield comparison task.
NeuropsychologiaBrain and conscious representation of outside reality
237 Citations1981Edoardo Bisiach, Erminio Capitani +2 more
It is suggested that the left half of the spatial framework of visual representations is impaired in patients with contralateral neglect, and analogical brain processes seem to underlie these representations.
NeuropsychologiaDeficits of attention in acute and recovered visual hemi-neglect
207 Citations1988Hans‐Otto Karnath
Three patients with right-sided lesions and, in two cases, clinically manifest neglect had to compare and to name stimuli presented tachistoscopically either bilateral-simultaneously or unilaterally in the LVF and/or RVF, suggesting a common mechanism underlying visual neglect and "extinction" with three components.
Journal of Neurology Neurosurgery & PsychiatryA variety of reading disability associated with right hemisphere lesions
201 Citations1962Marcel Kinsbourne, Elizabeth K. Warrington
Six right-handed patients with acquired right hemisphere lesions who suffered from reading disability had paralexic errors of a very characteristic, consistent, and hitherto undescribed type that could be reproduced experimentally under the controlled conditions of tachistoscopic presentation of written material.
Cognitive NeuropsychologySemantic processing in the neglected visual field: Evidence from a lexical decision task
186 Citations1993Regina McGlinchey‐Berroth, William Milberg +3 more
NeuropsychologiaImplicit associative priming in a patient with left visual neglect
150 Citations1993Elisabetta Làdavas, Raffaela Paladini +1 more
This patient with damage to the right hemisphere and with left visual neglect was able to perform a covert post-perceptual processing of the neglected stimuli, but could not do so when explicitly requested.
PubMedNeglect as a neural representation deficit.
130 Citations1990Giacomo Rizzolatti, Anna Berti
It is concluded that this syndrome is essentially a representational deficit consequent to lesions of neural centers responsible for the organization of motor acts, in which space is coded in non-retinal coordinates.
BrainMECHANISMS OF UNILATERAL SPATIAL NEGLECT IN RELATION TO LATERALITY OF CEREBRAL LESIONS
112 Citations1986Guido Gainotti, Patrizia D'Erme +2 more
The investigation was designed to test the hypothesis that the extent of space to be explored may have a different influence on unilateral spatial neglect of right and left brain-damaged patients, and found that inability to extract visual information from one side of the stimuli during single eye fixations may be the most characteristic feature of unilateral spatial neglected.
NeuropsychologiaUnconscious perception of “extinguished” visual stimuli: Reassessing the evidence
111 Citations1991Martha J. Farah, Mark A. Monheit +1 more
It is pointed out that the dissociation between identification and same/different matching could also be due to the possibility that less visual information about the contralesional stimulus is necessary to make a same/ different judgement than to identify the stimulus, and that chance performance is considerably higher in the first than in the second type of task.
NeuropsychologiaLevels of processing for visual stimuli in an “extinguished” field
105 Citations1992Anna Berti, Alan Allport +4 more
The case of another patient, E.M., in whom the patient was able to judge whether two simultaneous stimuli were identical or different, even when they were unable to name the stimulus contralateral to their brain injury is reported.
Journal of Experimental Psychology Learning Memory and CognitionInhibitory semantic priming of lexical decisions due to failure to retrieve weakly activated codes.
104 Citations1990Dale Dagenbach, Thomas H. Carr +1 more
BrainSELECTIVE SPATIAL ATTENTION IN PATIENTS WITH VISUAL EXTINCTION
82 Citations1990Elisabetta Làdavas
The results showed that the focus of attention in patients with visual extinction is on the rightmost stimulus and that the increased attention to the right is accompanied by a decreased Attention to the left.
Journal of the International Neuropsychological SocietyAssessment of neglect reveals dissociable behavioral but not neuroanatomical subtypes
68 Citations1996Regina McGlinchey‐Berroth, David P. Bullis +4 more
Data confirm the notion that hemispatial neglect is a complex and multifaceted disorder composed of cognitively independent processes, however, these processes cannot be dissociated neuroanatomically based on currently available assessment techniques.
NeuropsychologyActivating response codes by stimuli in the neglected visual field.
65 Citations1995Asher Cohen, Richard B. Ivry +2 more
Cognitive NeuropsychologyDoes the midsagittal plane play any privileged role in “left” neglect?
51 Citations1989John C. Marshall, Peter W. Halligan
It is found that, for most patients, there is an “attentional boundary” beyond which sustained attention cannot be further directed leftwards; the spatial position of this boundary is not intrinsically linked to the midsagittal plane; its position is rather a function of the overall severity of the patient's deficit on the task.
Brain and CognitionVisual neglect and left-sided context effects
47 Citations1991Thérèse Audet, Daniel N. Bub +1 more
The results reveal that a neglected item may influence the speed of responding in patients with left visual neglect, and are interpreted relative to the loci of context effects in normal subjects.
Cognitive NeuropsychologyOn the Processing of "Extinguished" Stimuli in Unilateral Visual Neglect: An Approach Using Negative Priming
28 Citations1996Luis J. Fuentes
The data indicate both that "extinguished" stimuli can be processed to activate internal representations and that inhibitory processes may not be applied unless conscious attention is involved.
Journal of NeurologyResidual information processing in the neglected visual half-field
27 Citations1987H.‐O. Karnath, W. Hartje
It is concluded that inattention for the left hemispace in patients with visual neglect occurs whenever information in the right hemi-space attracts attention or must be consciously processed.
Journal of Cognitive NeuroscienceSemantic Processing and Orthographic Specificity in Hemispatial Neglect
25 Citations1996Regina McGlinchey‐Berroth, William Milberg +4 more
Findings indicate that semantic processing of neglected lexical information is based on fully specified perceptual and orthographic information, and a lateral inhibitory mechanism is proposed that maximizes the probability that neglected Orthographic information will reach awareness.