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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

Neural correlates of improvements in personality and behavior following a neurological event
Publication date: Available online 21 November 2017Source: NeuropsychologiaAuthor(s): Marcie L. King, Kenneth Manzel, Joel Bruss, Daniel TranelAbstractResearch on changes in personality and behavior following brain damage has focused largely on negative outcomes, such as increased irritability, moodiness, and social inappropriateness. However, clinical observations suggest that some patients may actually show positive personality and behavioral changes following a neurological event. In the current work, we investigated neuroanatomical correlates of positive personality and behavioral changes following a discrete neurologi...
Source: Neuropsychologia - November 6, 2018 Category: Neurology Source Type: research

The involvement of left inferior frontal and middle temporal cortices in word production unveiled by greater facilitation effects following brain damage
Publication date: Available online 1 November 2018Source: NeuropsychologiaAuthor(s): Grégoire Python, Bertrand Glize, Marina LaganaroAbstractIn stroke-induced aphasia, left hemispheric lesions generally disturb the word production network. The left inferior frontal gyrus (LIFG) and the left middle temporal gyrus (LMTG) are involved in word production, but their respective contribution remains ambiguous. Previous investigations have largely focused on semantic interference to gather information about word production. Here we assessed the sensitivity of twenty-five aphasic speakers with either LIFG or LMTG lesions and match...
Source: Neuropsychologia - November 2, 2018 Category: Neurology Source Type: research

Event-related potentials support a Dual process account of the Embedded Chinese Character Task
Publication date: Available online 29 October 2018Source: NeuropsychologiaAuthor(s): Yue Yin, Tingting Yu, Shu Wang, Shujin Zhou, Xiaochen Tang, Edward J.N. Stupple, Junlong LuoAbstractTests of the principles of dual process theory are typically conducted in the reasoning and judgement/decision-making literature. The present study explores dual process explanations with a new paradigm – the Embedded Chinese Character Task (ECCT). The beauty of this task is that it allows the contrast of automatic and deliberate processes without the potential for conflict. We used event-related potentials (ERPs) and behavioral measures t...
Source: Neuropsychologia - October 30, 2018 Category: Neurology Source Type: research

Is VLSM a valid tool for determining the functional anatomy of the brain? Usefulness of additional Bayesian network analysis
ConclusionsConventional VLSM analyses are sensitive but weakened by a type I error due to the combined effects of multicollinearity and lesion frequency. We demonstrate that the addition of a Bayesian network analysis, and to a lesser extent of logistic regression, controlled for this type I error and constituted a reliable means of defining the functional anatomy of the motor system in stroke patients.
Source: Neuropsychologia - October 26, 2018 Category: Neurology Source Type: research

Functional reorganisation and recovery following cortical lesions: A preliminary study in macaque monkeys
Publication date: October 2018Source: Neuropsychologia, Volume 119Author(s): Matthew Ainsworth, Helen Browncross, Daniel J. Mitchell, Anna S. Mitchell, Richard E. Passingham, Mark J. Buckley, John Duncan, Andrew H. BellAbstractDamage following traumatic brain injury or stroke can often extend beyond the boundaries of the initial insult and can lead to maladaptive cortical reorganisation. On the other hand, beneficial cortical reorganisation leading to recovery of function can also occur. We used resting state FMRI to investigate how cortical networks in the macaque brain change across time in response to lesions to the pre...
Source: Neuropsychologia - September 13, 2018 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

Over- and underestimation of motor ability after a stroke: Implications for anosognosia
Publication date: Available online 9 August 2018Source: NeuropsychologiaAuthor(s): Elizabeth A. Fowler, Sergio Della Sala, Simon R. Hart, Robert D. McIntoshAbstractWe administered a discrepancy-based measure of anosognosia for hemiplegia (AHP) to a group of 42 right-brain-damaged (RBD) and left-brain-damaged (LBD) stroke patients with varying levels of functional motor ability. In addition to the expected anosognosic pattern of overestimation of motor function in some RBD patients, we found an equal and opposite underestimation in some others, both RBD and LBD. We also found that around a quarter of self-estimation error c...
Source: Neuropsychologia - August 10, 2018 Category: Neurology Source Type: research

What bilateral damage of the superior parietal lobes tells us about visual attention disorders in developmental dyslexia
Publication date: Available online 8 August 2018Source: NeuropsychologiaAuthor(s): S. Valdois, D. Lassus-Sangosse, M. Lallier, O. Moreaud, L. PisellaAbstractNeuroimaging studies have identified the superior parietal lobules bilaterally as the neural substrates of reduced visual attention (VA) span in developmental dyslexia. It remains however unclear whether the VA span deficit and the deficits in temporal and spatial attention shifting also reported in dyslexic children reflect a unitary spatio-temporal deficit of attention - probably linked to general posterior parietal dysfunction- or the dysfunction of distinct attenti...
Source: Neuropsychologia - August 9, 2018 Category: Neurology Source Type: research

Selective associative phonagnosia after right anterior temporal stroke
We report the case of a 48 year old men who developed a selective impairment in famous voice recognition after ischemic stroke in right subcortical structures (lenticular nucleus and head of the caudate) and right anterior temporal lobe. He underwent fibrinolytic treatment. During the following days he progressively recovered and was discharged without neurological focal sign. Patent foramen ovale was found. When he got back to his house he noticed that he was unable to recognize the voice of his favoured singers and needed to ask who was the singer to his relatives. Neuropsychological examination revealed a selective impa...
Source: Neuropsychologia - July 27, 2018 Category: Neurology Source Type: research

Lesion mapping in acute stroke aphasia and its implications for recovery
Publication date: 1 July 2018Source: Neuropsychologia, Volume 115Author(s): Stephanie J. Forkel, Marco CataniAbstractPatients with stroke offer a unique window into understanding human brain function. Mapping stroke lesions poses several challenges due to the complexity of the lesion anatomy and the mechanisms causing local and remote disruption 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 weeks from ...
Source: Neuropsychologia - July 10, 2018 Category: Neurology Source Type: research

Voxel-based lesion analysis of brain regions underlying reading and writing
Publication date: 1 July 2018Source: Neuropsychologia, Volume 115Author(s): Juliana V. Baldo, Natalie Kacinik, Carl Ludy, Selvi Paulraj, Amber Moncrief, Vitória Piai, Brian Curran, And Turken, Tim Herron, Nina F. DronkersAbstractThe neural basis of reading and writing has been a source of inquiry as well as controversy in the neuroscience literature. Reading has been associated with both left posterior ventral temporal zones (termed the “visual word form area”) as well as more dorsal zones, primarily in left parietal cortex. Writing has also been associated with left parietal cortex, as well as left sensorimotor corte...
Source: Neuropsychologia - July 10, 2018 Category: Neurology Source Type: research

The spatial distribution of perseverations in neglect patients during a nonverbal fluency task depends on the integrity of the right putamen
Publication date: 1 July 2018Source: Neuropsychologia, Volume 115Author(s): B.C. Kaufmann, J. Frey, T. Pflugshaupt, P. Wyss, R.E. Paladini, T. Vanbellingen, S. Bohlhalter, M. Chechlacz, T. Nef, R.M. Müri, D. Cazzoli, T. NyffelerAbstractDeficient inhibitory control leading to perseverative behaviour is often observed in neglect patients. Previous studies investigating the relationship between response inhibition and visual attention have reported contradictory results: some studies found a linear relationship between neglect severity and perseverative behaviour whereas others could not replicate this result. The aim of the...
Source: Neuropsychologia - July 10, 2018 Category: Neurology Source Type: research

Neural mechanisms of two different verbal working memory tasks: A VLSM study
Publication date: 1 July 2018Source: Neuropsychologia, Volume 115Author(s): M.V. Ivanova, O. Dragoy, S.V. Kuptsova, S. Yu. Akinina, A.G. Petrushevskii, O.N. Fedina, A. Turken, V.M. Shklovsky, N.F. DronkersAbstractCurrently, a distributed bilateral network of frontal-parietal areas is regarded as the neural substrate of working memory (WM), with the verbal WM network being more left-lateralized. This conclusion is based primarily on functional magnetic resonance imaging (fMRI) data that provides correlational evidence for brain regions involved in a task. However, fMRI cannot differentiate the areas that are fundamentally ...
Source: Neuropsychologia - July 10, 2018 Category: Neurology Source Type: research

Improved accuracy of lesion to symptom mapping with multivariate sparse canonical correlations
In this study, we propose a multivariate optimization technique known as sparse canonical correlation analysis for neuroimaging (SCCAN) for lesion to symptom mapping. To validate the method and compare it with mass-univariate results, we used data from 131 patients with chronic stroke lesions in the territory of the middle cerebral artery, and created synthetic behavioral scores based on the lesion load of 93 brain regions (putative functional units). LSM analyses were performed with univariate VLSM or SCCAN, and the accuracy of the two methods was compared in terms of both overlap and displacement from the simulated funct...
Source: Neuropsychologia - July 10, 2018 Category: Neurology Source Type: research