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Wilson, Stephen M.; Galantucci, Sebastiano; Tartaglia, Maria Carmela; Gorno-Tempini, Maria Luisa – Brain and Language, 2012
Patients with primary progressive aphasia (PPA) vary considerably in terms of which brain regions are impacted, as well as in the extent to which syntactic processing is impaired. Here we review the literature on the neural basis of syntactic deficits in PPA. Structural and functional imaging studies have most consistently associated syntactic…
Descriptors: Syntax, Aphasia, Patients, Brain Hemisphere Functions
Thothathiri, Malathi; Kimberg, Daniel Y.; Schwartz, Myrna F. – Journal of Cognitive Neuroscience, 2012
We explored the neural basis of reversible sentence comprehension in a large group of aphasic patients (n = 79). Voxel-based lesion symptom mapping revealed a significant association between damage in temporo-parietal cortex and impaired sentence comprehension. This association remained after we controlled for phonological working memory. We…
Descriptors: Evidence, Sentences, Aphasia, Patients
Nozari, Nazbanou; Dell, Gary S.; Schwartz, Myrna F. – Cognitive Psychology, 2011
Despite the existence of speech errors, verbal communication is successful because speakers can detect (and correct) their errors. The standard theory of speech-error detection, the perceptual-loop account, posits that the comprehension system monitors production output for errors. Such a comprehension-based monitor, however, cannot explain the…
Descriptors: Verbal Communication, Speech, Linguistics, Aphasia
Hoffman, Paul; Rogers, Timothy T.; Lambon Ralph, Matthew A. – Journal of Cognitive Neuroscience, 2011
Word frequency is a powerful predictor of language processing efficiency in healthy individuals and in computational models. Puzzlingly, frequency effects are often absent in stroke aphasia, challenging the assumption that word frequency influences the behavior of any computational system. To address this conundrum, we investigated divergent…
Descriptors: Semantics, Aphasia, Dementia, Patients
Thompson, Cynthia K.; Bonakdarpour, Borna; Fix, Stephen F. – Journal of Cognitive Neuroscience, 2010
Processing of lexical verbs involves automatic access to argument structure entries entailed within the verb's representation. Recent neuroimaging studies with young normal listeners suggest that this involves bilateral posterior peri-sylvian tissue, with graded activation in these regions on the basis of argument structure complexity. The aim of…
Descriptors: Verbs, Aphasia, Language Processing, Patients
Starrfelt, Randi; Behrmann, Marlene – Neuropsychologia, 2011
It is commonly assumed that number reading can be intact in patients with pure alexia, and that this dissociation between letter/word recognition and number reading strongly constrains theories of visual word processing. A truly selective deficit in letter/word processing would strongly support the hypothesis that there is a specialized system or…
Descriptors: Patients, Word Recognition, Literature Reviews, Neuropsychology
Romani, Cristina; Galluzzi, Claudia; Bureca, Ivana; Olson, Andrew – Cognitive Psychology, 2011
Current models of word production assume that words are stored as linear sequences of phonemes which are structured into syllables only at the moment of production. This is because syllable structure is always recoverable from the sequence of phonemes. In contrast, we present theoretical and empirical evidence that syllable structure is lexically…
Descriptors: Speech, Syllables, Phonemes, Aphasia
Oron, Anna; Szymaszek, Aneta; Szelag, Elzbieta – International Journal of Language & Communication Disorders, 2015
Background: Temporal information processing (TIP) underlies many aspects of cognitive functions like language, motor control, learning, memory, attention, etc. Millisecond timing may be assessed by sequencing abilities, e.g. the perception of event order. It may be measured with auditory temporal-order-threshold (TOT), i.e. a minimum time gap…
Descriptors: Cognitive Processes, Psychomotor Skills, Motor Reactions, Memory
Palmer, Rebecca; Enderby, Pam; Paterson, Gail – International Journal of Language & Communication Disorders, 2013
Background: Speech and language therapy (SLT) for aphasia can be difficult to access in the later stages of stroke recovery, despite evidence of continued improvement with sufficient therapeutic intensity. Computerized aphasia therapy has been reported to be useful for independent language practice, providing new opportunities for continued…
Descriptors: Aphasia, Therapy, Speech Language Pathology, Computer Use
Almaghyuli, Azizah; Thompson, Hannah; Lambon Ralph, Matthew A.; Jefferies, Elizabeth – Neuropsychologia, 2012
Patients with multimodal semantic impairment following stroke (referred to here as "semantic aphasia" or SA) fail to show the standard effects of frequency in comprehension tasks. Instead, they show absent or even "reverse" frequency effects: i.e., better understanding of less common words. In addition, SA is associated with poor regulatory…
Descriptors: Evidence, Semantics, Aphasia, Patients
Robson, Holly; Sage, Karen; Lambon Ralph, Matthew A. – Neuropsychologia, 2012
Wernicke's aphasia (WA) is the classical neurological model of comprehension impairment and, as a result, the posterior temporal lobe is assumed to be critical to semantic cognition. This conclusion is potentially confused by (a) the existence of patient groups with semantic impairment following damage to other brain regions (semantic dementia and…
Descriptors: Semantics, Dementia, Aphasia, Cognitive Processes
Robson, Holly; Keidel, James L.; Lambon Ralph, Matthew A.; Sage, Karen – Neuropsychologia, 2012
Wernicke's aphasia is a condition which results in severely disrupted language comprehension following a lesion to the left temporo-parietal region. A phonological analysis deficit has traditionally been held to be at the root of the comprehension impairment in Wernicke's aphasia, a view consistent with current functional neuroimaging which finds…
Descriptors: Evidence, Listening Comprehension, Speech Impairments, Semantics
Yamaguchi, Satoshi; Akanuma, Kyoko; Hatayama, Yuka; Otera, Masako; Meguro, Kenichi – International Journal of Rehabilitation Research, 2012
Patients with severe aphasia are rarely treated using speech therapy. We used music therapy to continue to treat a 79-year-old patient with chronic severe aphasia. Interventions 1, 2, and 3 were to practice singing a song that the patient knew, to practice singing a song with a therapist, and to practice saying a greeting using a song with lyrics,…
Descriptors: Intervention, Singing, Aphasia, Patients
Westermann, Gert; Ruh, Nicolas – Psychological Review, 2012
We present a neural network model of learning and processing the English past tense that is based on the notion that experience-dependent cortical development is a core aspect of cognitive development. During learning the model adds and removes units and connections to develop a task-specific final architecture. The model provides an integrated…
Descriptors: Learning Problems, Semantics, Brain Hemisphere Functions, Aphasia
Kopkalli-Yavuz, Handan; Mavis, Ilknur; Akyildiz, Didem – Clinical Linguistics & Phonetics, 2011
Studies investigating voicing onset time (VOT) production by speakers with aphasia have shown that nonfluent aphasics show a deficit in the articulatory programming of speech sounds based on the range of VOT values produced by aphasic individuals. If the VOT value lies between the normal range of VOT for the voiced and voiceless categories, then…
Descriptors: Phonetics, Aphasia, Patients, Foreign Countries