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Source: Neuropsychologia

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Total 127 results found since Jan 2013.

The impact of different aetiologies on the cognitive performance of frontal patients
We present the first comprehensive retrospective comparison of the impact of lesions of different aetiologies on neuropsychological performance in a large number of patients whose lesion solely affects the frontal cortex. We investigated patients who had a cerebrovascular accident (CVA), high (HGT) or low grade (LGT) tumour, or meningioma, all at the post-operative stage. The same frontal ‘executive’ (Raven's Advanced Progressive Matrices, Stroop Colour-Word Test, Letter Fluency-S; Trail Making Test Part B) and nominal (Graded Naming Test) tasks were compared. Patients' performance was compared across aetiologies contr...
Source: Neuropsychologia - January 4, 2015 Category: Neurology Source Type: research

Semantic memory: Which side are you on?
We present two patients in whom the combination of lesion site and cognitive performance was uniquely informative about the organisation and functional anatomy of semantic memory. One had had a single lobar stroke with an unusual distribution, largely destroying the whole of the left temporal lobe ventral to the superior temporal sulcus. The other patient had had herpes simplex encephalitis with destruction that was confined to the left cerebral hemisphere. The lesion again mainly encompassed the left temporal lobe, but also extended to the left inferior frontal gyrus. Cognitive outcomes in the two patients were compared w...
Source: Neuropsychologia - November 24, 2014 Category: Neurology Source Type: research

Subliminal galvanic-vestibular stimulation influences ego- and object-centred components of visual neglect
In conclusion, subliminal GVS modulates ego- and object-centred components of visual neglect rapidly. Implications for neurorehabilitation are discussed.
Source: Neuropsychologia - November 12, 2014 Category: Neurology Source Type: research

The role of prestimulus activity in visual extinction
Publication date: July 2013 Source:Neuropsychologia, Volume 51, Issue 8 Author(s): Maren Urner , Margarita Sarri , Jessica Grahn , Tom Manly , Geraint Rees , Karl Friston Patients with visual extinction following right-hemisphere damage sometimes see and sometimes miss stimuli in the left visual field, particularly when stimuli are presented simultaneously to both visual fields. Awareness of left visual field stimuli is associated with increased activity in bilateral parietal and frontal cortex. However, it is unknown why patients see or miss these stimuli. Previous neuroimaging studies in healthy adults show that presti...
Source: Neuropsychologia - November 6, 2014 Category: Neurology Source Type: research

Preserved mid-fusiform activation for visual words in a patient with a visual word recognition impairment
Publication date: December 2014 Source:Neuropsychologia, Volume 65 Author(s): Suzanne E. Welcome , Adrian Pasquarella , Xi Chen , David R. Olson , Marc F. Joanisse Previous functional imaging studies have highlighted the role of left ventral temporal cortex in processing written word forms. We explored activation and anatomical connectivity of this region in HE, a professional writer with alexia as a result of stroke affecting primarily white matter in the left inferior temporal lobe. We used a one-back visual recognition task and functional Magnetic Resonance Imaging to elicit automatic activation to various orthographi...
Source: Neuropsychologia - November 3, 2014 Category: Neurology Source Type: research

Cortical and subcortical contributions to state- and strength-based perceptual judgments
Publication date: November 2014 Source:Neuropsychologia, Volume 64 Author(s): Mariam Aly , Murielle Wansard , Fermín Segovia , Andrew P. Yonelinas , Christine Bastin Perceptual judgments can be made on the basis of different kinds of information: state-based access to specific details that differentiate two similar images, or strength-based assessments of relational match/mismatch. We explored state- and strength-based perception in eleven right-hemisphere stroke patients, and examined lesion overlap images to gain insight into the neural underpinnings of these different kinds of perceptual judgments. Patients and healt...
Source: Neuropsychologia - November 3, 2014 Category: Neurology Source Type: research

CNV amplitude as a neural correlate for stuttering frequency: A case report of acquired stuttering
In conclusion, late CNV amplitude elicited by a relatively simple speech task seems to be able to provide an objective, neural correlate of stuttering frequency. The present case report supports the hypothesis that motor preparation has an important role in stuttering.
Source: Neuropsychologia - November 3, 2014 Category: Neurology Source Type: research