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Standardizing norms for 180 coloured Snodgrass and Vanderwart pictures in Kannada language
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In: PLoS One (2022)
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The cognitive and neurological effects of bilingualism on healthy ageing and the progression of dementia: a longitudinal study ...
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Efficacy of spoken word comprehension therapy in patients with chronic aphasia: a cross-over randomised controlled trial with structural imaging ...
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Efficacy of spoken word comprehension therapy in patients with chronic aphasia: a cross-over randomised controlled trial with structural imaging. ...
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Efficacy of spoken word comprehension therapy in patients with chronic aphasia: a cross-over randomised controlled trial with structural imaging.
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Efficacy of spoken word comprehension therapy in patients with chronic aphasia: a cross-over randomised controlled trial with structural imaging
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When does lexical availability influence phonology? Evidence from Jargon reading and repetition ...
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When does lexical availability influence phonology? Evidence from Jargon reading and repetition ...
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Auditory, Phonological, and Semantic Factors in the Recovery From Wernicke’s Aphasia Poststroke: Predictive Value and Implications for Rehabilitation ...
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Auditory, Phonological, and Semantic Factors in the Recovery From Wernicke’s Aphasia Poststroke: Predictive Value and Implications for Rehabilitation ...
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What can repetition, reading and naming tell us about Jargon Aphasia?
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Artificial grammar learning in vascular and progressive non-fluent aphasias
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Sources of Phoneme Errors in Repetition: Perseverative, Neologistic, and Lesion Patterns in Jargon Aphasia
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Sources of phoneme errors in repetition: perseverative, neologistic and lesion patterns in jargon aphasia
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Phonological and semantic processing during comprehension in Wernicke’s aphasia: a N400 and Phonological Mapping Negativity study
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MaLT – combined Motor and Language Therapy tool for brain injury patients using kinect
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Arterial spin labelling shows functional depression of non-lesion tissue in chronic Wernicke’s aphasia
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Varieties of semantic ‘access’ deficit in Wernicke’s aphasia and semantic aphasia
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Abstract:
Comprehension deficits are common in stroke aphasia, including in cases with (i) semantic aphasia, characterized by poor executive control of semantic processing across verbal and non-verbal modalities; and (ii) Wernicke’s aphasia, associated with poor auditory–verbal comprehension and repetition, plus fluent speech with jargon. However, the varieties of these comprehension problems, and their underlying causes, are not well understood. Both patient groups exhibit some type of semantic ‘access’ deficit, as opposed to the ‘storage’ deficits observed in semantic dementia. Nevertheless, existing descriptions suggest that these patients might have different varieties of ‘access’ impairment—related to difficulty resolving competition (in semantic aphasia) versus initial activation of concepts from sensory inputs (in Wernicke’s aphasia). We used a case series design to compare patients with Wernicke’s aphasia and those with semantic aphasia on Warrington’s paradigmatic assessment of semantic ‘access’ deficits. In these verbal and non-verbal matching tasks, a small set of semantically-related items are repeatedly presented over several cycles so that the target on one trial becomes a distractor on another (building up interference and eliciting semantic ‘blocking’ effects). Patients with Wernicke’s aphasia and semantic aphasia were distinguished according to lesion location in the temporal cortex, but in each group, some individuals had additional prefrontal damage. Both of these aspects of lesion variability—one that mapped onto classical ‘syndromes’ and one that did not—predicted aspects of the semantic ‘access’ deficit. Both semantic aphasia and Wernicke’s aphasia cases showed multimodal semantic impairment, although as expected, the Wernicke’s aphasia group showed greater deficits on auditory-verbal than picture judgements. Distribution of damage in the temporal lobe was crucial for predicting the initially ‘beneficial’ effects of stimulus repetition: cases with Wernicke’s aphasia showed initial improvement with repetition of words and pictures, while in semantic aphasia, semantic access was initially good but declined in the face of competition from previous targets. Prefrontal damage predicted the ‘harmful’ effects of repetition: the ability to reselect both word and picture targets in the face of mounting competition was linked to left prefrontal damage in both groups. Therefore, patients with semantic aphasia and Wernicke’s aphasia have partially distinct impairment of semantic ‘access’ but, across these syndromes, prefrontal lesions produce declining comprehension with repetition in both verbal and non-verbal tasks.
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URL: https://doi.org/10.1093/brain/awv281 https://eprints.whiterose.ac.uk/93256/ https://eprints.whiterose.ac.uk/93256/1/3776.full.pdf
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Varieties of semantic 'access' deficit in Wernicke's aphasia and semantic aphasia
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Varieties of semantic ‘access’ deficit in Wernicke’s aphasia and semantic aphasia
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