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Source: Neuropsychologia
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Total 127 results found since Jan 2013.
The role of the right hemisphere in semantic control: A case-series comparison of right and left hemisphere stroke
Publication date: Available online 2 March 2016 Source:Neuropsychologia Author(s): Hannah E. Thompson, Lauren Henshall, Elizabeth Jefferies Semantic control processes guide conceptual retrieval so that we are able to focus on non-dominant associations and features when these are required for the task or context, yet the neural basis of semantic control is not fully understood. Neuroimaging studies have emphasised the role of left inferior frontal gyrus (IFG) in controlled retrieval, while neuropsychological investigations of semantic control deficits have almost exclusively focussed on patients with left-sided damage ...
Source: Neuropsychologia - March 3, 2016 Category: Neurology Source Type: research
Lesion correlates of impairments in actual tool use following unilateral brain damage
This study employs Voxel Lesion Symptom Mapping to relate the functional impairment in actual tool use with extent and localization of the structural damage in the left (LBD, N=31) and right (RBD, N=19) hemisphere in chronic stroke patients. A series of 12 tools was presented to participants in a carousel. In addition, a non-tool condition tested the prescribed manipulation of a bar. The execution was scored according to an apraxic error scale based on the dimensions grasp, movement, direction and space. Results in the LBD group show that the ventro-dorsal stream constitutes the core of the defective network responsible fo...
Source: Neuropsychologia - February 19, 2016 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
Effect of meaning on apraxic finger imitation deficits
Publication date: February 2016 Source:Neuropsychologia, Volume 82 Author(s): E.I.S. Achilles, G.R. Fink, M.H. Fischer, A. Dovern, A. Held, D.C. Timpert, C. Schroeter, K. Schuetz, C. Kloetzsch, P.H. Weiss Apraxia typically results from left-hemispheric (LH), but also from right-hemispheric (RH) stroke, and often impairs gesture imitation. Especially in LH stroke, it is important to differentiate apraxia-induced gesture imitation deficits from those due to co-morbid aphasia and associated semantic deficits, possibly influencing the imitation of meaningful (MF) gestures. To explore this issue, we first investigat...
Source: Neuropsychologia - January 21, 2016 Category: Neurology Source Type: research
The Relationships between the amount of spared tissue, percent signal change, and accuracy in semantic processing in aphasia
This study included 14 persons with aphasia in the chronic stage of recovery (six or more months post stroke), along with normal controls, who performed semantic processing tasks of determining whether a written semantic feature matched a picture or whether two written words were related or not. Using region of interest (ROI) analysis, we found that left inferior frontal gyrus pars opercularis and pars triangularis, despite significant damage, were the only regions to correlate with behavioral accuracy. Additionally, bilateral frontal regions including superior frontal gyrus, middle frontal gyrus, and anterior cingulate ap...
Source: Neuropsychologia - January 13, 2016 Category: Neurology Source Type: research
The relationship between novel word learning and anomia treatment success in adults with chronic aphasia
Discussion This is the first group study to directly examine the relationship between novel word learning and therapy outcomes for anomia rehabilitation in adults with aphasia. Importantly, we found that novel word learning performance was correlated with therapy outcomes. We propose that novel word learning ability may contribute to the initial acquisition of treatment gains in anomia rehabilitation.
Source: Neuropsychologia - December 25, 2015 Category: Neurology Source Type: research
Effect of Meaning on ApraxicFinger Imitation Deficits
Publication date: Available online 23 December 2015 Source:Neuropsychologia Author(s): E.I.S. Achilles, G.R. Fink, M.H. Fischer, A. Dovern, A. Held, D.C. Timpert, C. Schroeter, K. Schuetz, C. Kloetzsch, P.H. Weiss Apraxia typically results from left-hemispheric (LH), but also from right-hemispheric (RH) stroke, and often impairs gesture imitation. Especially in LH stroke, it is important to differentiate apraxia-induced gesture imitation deficits from those due to co-morbid aphasia and associated semantic deficits, possibly influencing the imitation of meaningful (MF) gestures. To explore this issue, we first i...
Source: Neuropsychologia - December 23, 2015 Category: Neurology Source Type: research
A predictive model for diagnosing stroke-related apraxia of speech
Publication date: Available online 19 December 2015 Source:Neuropsychologia Author(s): Kirrie J. Ballard, Lamiae Azizi, Joseph R. Duffy, Malcolm R. McNeil, Mark Halaki, Nicholas O’Dwyer, Claire Layfield, Dominique I. Scholl, Adam P. Vogel, Donald A. Robin Diagnosis of the speech motor planning/programming disorder, apraxia of speech (AOS), has proven challenging, largely due to its common co-occurrence with the language-based impairment of aphasia. Currently, diagnosis is based on perceptually identifying and rating the severity of several speech features. It is not known whether all, or a subset of the featu...
Source: Neuropsychologia - December 20, 2015 Category: Neurology Source Type: research
Understanding the role of the primary somatosensory cortex: Opportunities for rehabilitation
Publication date: December 2015 Source:Neuropsychologia, Volume 79, Part B Author(s): M.R. Borich, S.M. Brodie, W.A. Gray, S. Ionta, L.A. Boyd Emerging evidence indicates impairments in somatosensory function may be a major contributor to motor dysfunction associated with neurologic injury or disorders. However, the neuroanatomical substrates underlying the connection between aberrant sensory input and ineffective motor output are still under investigation. The primary somatosensory cortex (S1) plays a critical role in processing afferent somatosensory input and contributes to the integration of sensory and motor si...
Source: Neuropsychologia - December 2, 2015 Category: Neurology Source Type: research
Motor imagery based brain–computer interfaces: An emerging technology to rehabilitate motor deficits
Publication date: Available online 14 September 2015 Source:Neuropsychologia Author(s): Luz Maria Alonso-Valerdi, Ricardo Antonio Salido-Ruiz, Ricardo A. Ramirez-Mendoza When the sensory–motor integration system is malfunctioning provokes a wide variety of neurological disorders, which in many cases cannot be treated with conventional medication, or via existing therapeutic technology. A brain–computer interface (BCI) is a tool that permits to reintegrate the sensory–motor loop, accessing directly to brain information. A potential, promising and quite investigated application of BCI has been in the motor rehabil...
Source: Neuropsychologia - September 29, 2015 Category: Neurology Source Type: research
Motor Imagery based Brain-Computer Interfaces: An Emerging Technology to Rehabilitate Motor Deficits
Publication date: Available online 14 September 2015 Source:Neuropsychologia Author(s): Alonso-Valerdi. Luz Maria, Salido-Ruiz Ricardo Antonio, Ramirez-Mendoza Ricardo A When the sensory-motor integration system is malfunctioning provokes a wide variety of neurological disorders, which in many cases cannot be treated with conventional medication, or via existing therapeutic technology. A brain-computer interface (BCI) is a tool that permits to reintegrate the sensory-motor loop, accessing directly to brain information. A potential, promising and quite investigated application of BCI has been in the motor rehabilitatio...
Source: Neuropsychologia - September 15, 2015 Category: Neurology Source Type: research
Right fronto-limbic atrophy is associated with reduced empathy in refractory unilateral mesial temporal lobe epilepsy
Publication date: Available online 9 September 2015 Source:Neuropsychologia Author(s): Gianina Toller, Babu Adhimoolam, Katherine P. Rankin, Hans-Jürgen Huppertz, Martin Kurthen, Hennric Jokeit Refractory mesial temporal lobe epilepsy (MTLE) is the most frequent focal epilepsy and is often accompanied by deficits in social cognition including emotion recognition, theory of mind, and empathy. Consistent with the neuronal networks that are crucial for normal social-cognitive processing, these impairments have been associated with functional changes in fronto-temporal regions. However, although atrophy in unilateral ...
Source: Neuropsychologia - September 9, 2015 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
Understanding the role of the primary somatosensory cortex: opportunities for rehabilitation
Publication date: Available online 9 July 2015 Source:Neuropsychologia Author(s): Borich MR , Brodie SM , Gray WA , Ionta S , Boyd LA Emerging evidence indicates impairments in somatosensory function may be a major contributor to motor dysfunction associated with neurologic injury or disorders. However, the neuroanatomical substrates underlying the connection between aberrant sensory input and ineffective motor output are still under investigation. The primary somatosensory cortex (S1) plays a critical role in processing afferent somatosensory input and contributes to the integration of sensory and motor signals necessar...
Source: Neuropsychologia - July 10, 2015 Category: Neurology Source Type: research
The effect of age on cognitive performance of frontal patients
Publication date: August 2015 Source:Neuropsychologia, Volume 75 Author(s): Lisa Cipolotti , Colm Healy , Edgar Chan , Sarah E. MacPherson , Mark White , Katherine Woollett , Martha Turner , Gail Robinson , Barbara Spanò , Marco Bozzali , Tim Shallice Age is known to affect prefrontal brain structure and executive functioning in healthy older adults, patients with neurodegenerative conditions and TBI. Yet, no studies appear to have systematically investigated the effect of age on cognitive performance in patients with focal lesions. We investigated the effect of age on the cognitive performance of a large sample of tumo...
Source: Neuropsychologia - June 27, 2015 Category: Neurology Source Type: research
