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Source: Neuropsychologia
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Total 127 results found since Jan 2013.
Time-course investigation of postural sway variability: Does anxiety exacerbate the sensory reweighting impairment in chronic stroke survivors?
Publication date: Available online 8 March 2019Source: NeuropsychologiaAuthor(s): Shamsi Jamali, Akram Azad, Hajar Mehdizadeh, Asgar Doostdar, Fatemeh Hoseinpour, Maryam Mehdizadeh, Javad Niazi-Khatoon, Mohammad Reza Shokouhyan, Mohamad Parnianpour, Ghorban Taghizadeh, Kinda KhalafAbstractAlthough anxiety is one of the most prevalent psychological disorders in stroke survivors, its effect on sensory reweighting has not yet been fully studied. The aim of this work was to investigate how anticipation of collision avoidance events affects sensory reweighting in chronic stroke survivors with low and high levels of anxiety (LA-...
Source: Neuropsychologia - March 10, 2019 Category: Neurology Source Type: research
Deficits of reach-to-grasp coordination following stroke: Comparison of instructed and natural movements
Publication date: October 2015 Source:Neuropsychologia, Volume 77 Author(s): Benjamin Baak, Otmar Bock, Anna Dovern, Jochen Saliger, Hans Karbe, Peter H. Weiss The present work evaluates whether stroke-induced deficits of reach-to-grasp movements, established by typical laboratory paradigms, transfer unconditionally to more natural situations. Sixteen patients with a stroke to the motor-dominant left hemisphere and 16 age- and gender-matched healthy control subjects executed grasping movements with their left (ipsilesional, non-dominant) hand. All movements started in the same position, were aimed at the same objec...
Source: Neuropsychologia - August 7, 2015 Category: Neurology Source Type: research
The influence of naturalistic, directionally non-specific motion on the spatial deployment of visual attention in right-hemispheric stroke
Publication date: Available online 19 April 2016 Source:Neuropsychologia Author(s): Dario Cazzoli, Simone Hopfner, Basil Preisig, Giuseppe Zito, Tim Vanbellingen, Michael Jäger, Tobias Nef, Urs Mosimann, Stephan Bohlhalter, René M. Müri, Thomas Nyffeler An impairment of the spatial deployment of visual attention during exploration of static (i.e., motionless) stimuli is a common finding after an acute, right-hemispheric stroke. However, less is known about how these deficits: a) are modulated through naturalistic motion (i.e., without directional, specific spatial features); and, b) evolve in the subacute/c...
Source: Neuropsychologia - April 19, 2016 Category: Neurology Source Type: research
Rotational coherent dot movement normalizes spatial disorientation of the subjective visual vertical in patients with rightsided stroke
Publication date: Available online 30 April 2016 Source:Neuropsychologia Author(s): S. Reinhart, A.K. Schaadt, I. Keller, H. Hildebrandt, G. Kerkhoff, K. Utz Studies in healthy individuals indicate a significant influence of rotating visual motion on judgments of the subjective visual vertical (SVV). Moreover, sensory stimulation manoeuvres like horizontal coherent dot movement significantly modulate horizontal spatial deficits in patients with rightsided stroke. Here, we investigated whether rotational coherent dot movement (RCDM) modulates spatial orientation deficits of the SVV in the roll plane in right hemisph...
Source: Neuropsychologia - April 29, 2016 Category: Neurology Source Type: research
Timing independent spatial motor sequence learning is preserved in left hemisphere stroke
Publication date: Available online 28 September 2017 Source:Neuropsychologia Author(s): Anna Dovern, Eva Niessen, Jana M. Ant, Jochen Saliger, Hans Karbe, Gereon R. Fink, Iring Koch, Peter H. Weiss During neurorehabilitation, the re-learning of motor sequences is crucial for patients with motor deficits, enabling them to master again complex movements. A recent study showed that patients with left hemisphere (LH) stroke exhibited preserved motor sequence learning (as assessed by the serial reaction time (SRT) task) when the timing of the stimuli was comparable in the training and later test phase. However, patients showed...
Source: Neuropsychologia - September 28, 2017 Category: Neurology Source Type: research
Diagnostic validity of line bisection in the acute phase of stroke
Publication date: Available online 22 January 2016 Source:Neuropsychologia Author(s): Christoph Sperber, Hans-Otto Karnath The line bisection task is commonly depicted as a valid diagnostic tool to help differentiate between primary visual field defects and spatial neglect. However, recent studies have addressed possible drawbacks in the acute phase after stroke onset. We investigated these critical assumptions in a large and homogeneous sample of 180 acute stroke patients. Line bisection, cancellation performance, copying, and primary visual field defects were assessed in 180 acute right-hemispheric stroke patients. E...
Source: Neuropsychologia - January 23, 2016 Category: Neurology Source Type: research
A systematic investigation of navigation impairment in chronic stroke patients: Evidence for three distinct types
Conclusions The current study provides the first empirical support for the distinction between landmark-based, location-based, and path-based navigation impairment. Future research relying on other assessment instruments of navigation ability might be helpful to further validate this distinction.
Source: Neuropsychologia - July 4, 2017 Category: Neurology Source Type: research
Lesion mapping in acute stroke aphasia and its implications for recovery
Publication date: Available online 30 March 2018 Source:Neuropsychologia Author(s): Stephanie J Forkel, Marco Catani Patients with stroke lesions offer a unique window into understanding human brain function. Studying stroke lesions poses several challenges due to the complexity of the lesion anatomy and the mechanisms causing local and remote disruptions on brain networks. In this prospective longitudinal study, we compare standard and advanced approaches to white matter lesion mapping applied to acute stroke patients with aphasia. Eighteen patients with acute left hemisphere stroke were recruited and scanned within two ...
Source: Neuropsychologia - March 31, 2018 Category: Neurology Source Type: research
Hemispheric contributions to language reorganisation: An MEG study of neuroplasticity in chronic post stroke aphasia
In this study, magnetoencephalography was used to investigate neurophysiological changes in a group of chronic aphasia patients who underwent intensive language action therapy (ILAT), also known as constraint-induced aphasia therapy (CIAT). Before and immediately after ILAT, patients’ language and communication skills were assessed and their brain responses were recorded during a lexical magnetic mismatch negativity (MMNm) paradigm, presenting familiar spoken words and meaningless pseudowords. After the two-week therapy interval, patients showed significant clinical improvements of language and communication skills. Spat...
Source: Neuropsychologia - April 7, 2016 Category: Neurology Source Type: research
The effect of rotating random dot motion on visuospatial line orientation in patients with right-sided stroke
Publication date: Available online 27 May 2016 Source:Neuropsychologia Author(s): A.K. Schaadt, S. Reinhart, I. Keller, H. Hildebrandt, G. Kerkhoff, K.S. Utz Spatial deficits are frequent after brain damage, particularly right hemisphere stroke. Visual judgments of line orientation (LINE) are often impaired after right parietal lesions. Perception of line orientation is an important visuoperceptual component of visuoconstructive capacities. Yet, little is known about modulating factors in LINE and effective treatments are rare for this disorder. Studies in patients with spatial neglect show that horizontal random d...
Source: Neuropsychologia - May 26, 2016 Category: Neurology Source Type: research
Body Schema Plasticity after Stroke: Subjective and Neurophysiological Correlates of the Rubber Hand Illusion
Publication date: Available online 8 January 2017 Source:Neuropsychologia Author(s): Roberto Llorens, Adrián Borrego, Priscila Palomo, Ausiàs Cebolla, Enrique Noé, Sergi Bermúdez i Badia, Rosa Baños Stroke can lead to motor impairments that can affect the body structure and restraint mobility. We hypothesize that brain lesions and their motor sequelae can distort the body schema, a sensorimotor map of body parts and elements in the peripersonal space through which human beings embody the reachable space and ready the body for forthcoming movements. Two main constructs have been identified in the embodiment mechanism:...
Source: Neuropsychologia - January 7, 2017 Category: Neurology Source Type: research
Neural correlates of visuospatial bias in patients with left hemisphere stroke: a causal functional contribution analysis based on game theory
Publication date: Available online 12 October 2017 Source:Neuropsychologia Author(s): C. Malherbe, R. Umarova, M. Zavaglia, C. Kaller, L. Beume, G. Thomalla, C. Weiller, C.C. Hilgetag Stroke patients frequently display spatial neglect, an inability to report, or respond to, relevant stimuli in the contralesional space. Although this syndrome is widely considered to result from the dysfunction of a large-scale attention network, the individual contributions of damaged grey and white matter regions to neglect are still being disputed. Moreover, while the neuroanatomy of neglect in right hemispheric lesions is well studied, ...
Source: Neuropsychologia - October 13, 2017 Category: Neurology Source Type: research
Magnifying vision improves motor performance in individuals with stroke
Publication date: Available online 30 August 2018Source: NeuropsychologiaAuthor(s): Elisabetta Ambron, Steven Jax, Luis F. Schettino, H. Branch CoslettAbstractIncreasing perceived hand size using magnifying lenses improves tactile discrimination and motor performance in neurologically-intact individuals. We tested whether magnification of the hand can improve motor function in individuals with chronic stroke. Twenty-five individuals with a history of stroke more than 6 months prior to testing underwent a series of tasks exploring different aspects of motor performance (grip force, finger tapping, reaching and grasping, and...
Source: Neuropsychologia - August 31, 2018 Category: Neurology Source Type: research
