Eye movements and bisection behavior in spatial neglect syndrome: representational biases induced by the segment length and spatial dislocation of the stimulus

2012 ◽  
Vol 13 (S1) ◽  
pp. 89-92 ◽  
Author(s):  
Michela Balconi ◽  
Matteo Sozzi ◽  
Chiara Ferrari ◽  
Luigi Pisani ◽  
Claudio Mariani
Keyword(s):  
Eye Movements ◽  
Spatial Neglect ◽  
Segment Length ◽  
Neglect Syndrome

Higher visual cognition: search, neglect, attention, and eye movements

2012 ◽  
Author(s):  
Jacinta OʼShea ◽  
Matthew F. S. Rushworth
Keyword(s):  
Eye Movements ◽  
Posterior Parietal Cortex ◽  
Visual Cognition ◽  
Spatial Neglect ◽  
Neural Basis ◽  
Functional Roles ◽  
Frontoparietal Network ◽  
Posterior Parietal ◽  
Future Work ◽  
Patient Studies

This article reviews the contribution of transcranial magnetic stimulation (TMS) research to the understanding of attention, eye movements, visual search, and neglect. It considers how TMS studies have confirmed, refined, or challenged prevailing ideas about the neural basis of higher visual cognition. It shows that TMS has enhanced the understanding of the location, timing, and functional roles of visual cognitive processes in the human brain. The main focus is on studies of posterior parietal cortex (PPC), with reference to recent work on the frontal eye fields (FEFs). TMS offers many advantages to complement neuropsychological patient studies to enhance the understanding of how the fronto-parietal cortical nerves function. The visuo-spatial neglect- and extinction-like deficits incurred by parietal damage have been modelled successfully using TMS. Future work might be directed at teasing apart the distinct functional roles of nodes within this frontoparietal network in different sensorimotor contexts.

Coupling Acoustic Feedback to Eye Movements to Reduce Spatial Neglect

2013 ◽  
Vol 20 (3) ◽  
pp. 262-269 ◽  
Author(s):  
Gisela Pusswald ◽  
Nikolaus Steinhoff ◽  
Christian Müller
Keyword(s):  
Eye Movements ◽  
Spatial Neglect ◽  
Acoustic Feedback

scholarly journals Bisection and visual exploration strategy in hemineglect: eye-movement measures for rehabilitation treatment

2013 ◽  
Author(s):  
Matteo Sozzi ◽  
Michela Balconi ◽  
Luigi Pisani ◽  
Claudio Mariani
Keyword(s):  
Eye Movements ◽  
Eye Movement ◽  
Visual Exploration ◽  
Movement Behavior ◽  
Segment Length ◽  
Task Space ◽  
Behavioral Measures ◽  
Gradient Effect ◽  
Gradient Effects ◽  
Healthy Participants

Aim of this study is to explore behavioral responses and eye movements of unilateral neglect patients in a virtual bisection task. Space to be bisected was included between two endpoint, segment length together with segment spatial dislocation were varied in order to test the presence of a gradient effect in both bisection behavior and visual exploration. Ten right neglect patients took part to the study, all data were then matched with those obtained from ten healthy participants. Behavioral measures (bisection and RTs) and eye-movements (fixation count and duration; first fixation count) were analyzed. Consistent spatial biases were found for bisection responses, RTs, fixation count and duration, as well as for the first fixation count. We then find a significant rightward bias in patients, i.e. increasing rightside bisection and rightward fixations when the stimuli were in the extreme left-position. Concerning merely segment length, we observed significant differences between-groups only for eye movement behavior, with increased rightward fixation count and duration in response to longer segments. In conclusion, left-to-right and longer-to-shorter continuous-gradient effects were not totally supported by our results, whereas an extreme-left gradient effect was suggested and discussed.

scholarly journals A Chinese Patient with Pusher Syndrome and Unilateral Spatial Neglect Syndrome

2014 ◽  
Vol 41 (4) ◽  
pp. 493-497 ◽  
Author(s):  
Xiao-Wei Chen ◽  
Cheng-He Lin ◽  
Hua Zheng ◽  
Zhen-Lan Lin
Keyword(s):  
Behavioral Therapy ◽  
Clinical Manifestations ◽  
Chinese Patient ◽  
Spatial Neglect ◽  
Behavioral Characteristics ◽  
Unilateral Spatial Neglect ◽  
Graphic Sequence ◽  
Thalamic Hemorrhage ◽  
Pusher Syndrome ◽  
Neglect Syndrome

Objective:To observe clinical manifestations, behavioral characteristics, and effects of rehabilitation on a patient with pusher syndrome and unilateral spatial neglect caused by right thalamic hemorrhage.Methods:Assessment of pusher syndrome was made by the Scale for Contraversive pushing (SCP), and unilateral spatial neglect syndrome was diagnosed using line cancellation, letter and star cancellation, line bisection tests and copy and continuation of graphic sequence test. Behavioral therapy, occupational therapy, reading training and traditional Chinese medicine methods were adopted for treatment of pusher syndrome and unilateral spatial neglect.Results:The patient showed typical pusher syndrome and unilateral spatial neglect symptoms. The pusher syndrome and unilateral spatial neglect symptoms were significantly improved following rehabilitation treatments.Conclusions:Pusher syndrome and unilateral spatial neglect syndrome occurred simultaneously after right thalamic hemorrhage. Early rehabilitation therapy can reduce the symptoms of pusher syndrome and unilateral spatial neglect syndrome and improve motor function.

Selective reorienting response of the left hemisphere to invalid visual targets in the right side of space: Relevance for the spatial neglect syndrome

Cortex ◽  
2015 ◽  
Vol 65 ◽  
pp. 31-35 ◽  
Author(s):  
Alessio Dragone ◽  
Stefano Lasaponara ◽  
Massimo Silvetti ◽  
Emiliano Macaluso ◽  
Fabrizio Doricchi
Keyword(s):  
Left Hemisphere ◽  
Spatial Neglect ◽  
Neglect Syndrome ◽  
Visual Targets ◽  
The Right
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