Disorders of Higher Cortical Function

Abstract

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Functional Deficits in the Less-Impaired Arm of Stroke Survivors Depend on Hemisphere of Damage and Extent of Paretic Arm Impairment

“…Ideomotor limb apraxia is known to affect skilled, purposeful movements such as those assessed by the JHFT, particularly following a left-hemisphere stroke. 9,35 Of our 110 stroke participants, 20 (12 LHD, 8 RHD) were identified as apraxic. To assess the effect of apraxia on performance, we removed the 20 apraxic participants from our ANOVA and found that the main effect of impairment group [ F (3, 136) = 20.3; P < .0001] remained.…”

The Neuropsychology of Feature Binding and Conscious Perception

“…Although UN patients are often unware of contralesional stimuli, several patients have now been documented who show to be able to process implicitly the color, shape, identity, and even meaning of symbols, words, and pictures presented in the affected hemispace (e.g., Làdavas et al, 1993). To account for this surprising dissociation, it has been proposed that the impaired spatial representation of contralesional stimuli is what prevent the other stimulus features, which would be fully and adequately processed, from entering consciousness (Berti and Rizzolatti, 1992; Berti et al, 2015). Consistent with FIT, the lack of spatial coding of contralesional objects would prevent attention from being oriented toward them, thus also preventing the binding of their features and their access to consciousness (Deouell, 2002).…”

Dropout during inference as a model for neurological degeneration in an image captioning network

“…Both of these patterns are sometimes observed in patients with paraphasic disorders, like fluent aphasia (Berti et al, 2015). In particular, one symptom of Wernicke's Aphasia is the use of jargon speech: long streams of words with seemingly no meaning but retaining some phonological and grammatical structure.…”