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Brain and Language

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https://www.readbyqxmd.com/read/28110105/a-common-neural-hub-resolves-syntactic-and-non-syntactic-conflict-through-cooperation-with-task-specific-networks
#1
Nina S Hsu, Susanne M Jaeggi, Jared M Novick
Regions within the left inferior frontal gyrus (LIFG) have simultaneously been implicated in syntactic processing and cognitive control. Accounts attempting to unify LIFG's function hypothesize that, during comprehension, cognitive control resolves conflict between incompatible representations of sentence meaning. Some studies demonstrate co-localized activity within LIFG for syntactic and non-syntactic conflict resolution, suggesting domain-generality, but others show non-overlapping activity, suggesting domain-specific cognitive control and/or regions that respond uniquely to syntax...
January 18, 2017: Brain and Language
https://www.readbyqxmd.com/read/28088666/vocal-emotion-decoding-in-the-subthalamic-nucleus-an-intracranial-erp-study-in-parkinson-s-disease
#2
Julie Péron, Olivier Renaud, Claire Haegelen, Lucas Tamarit, Valérie Milesi, Jean-François Houvenaghel, Thibaut Dondaine, Marc Vérin, Paul Sauleau, Didier Grandjean
Using intracranial local field potential (LFP) recordings in patients with Parkinson's disease (PD) undergoing deep brain stimulation (DBS), we explored the electrophysiological activity of the subthalamic nucleus (STN) in response to emotional stimuli in the auditory modality. Previous studies focused on the influence of visual stimuli. To this end, we recorded LFPs within the STN in response to angry, happy, and neutral prosodies in 13 patients with PD who had just undergone implantation of DBS electrodes...
January 12, 2017: Brain and Language
https://www.readbyqxmd.com/read/28088127/cerebral-laterality-for-language-is-related-to-adult-salivary-testosterone-levels-but-not-digit-ratio-2d-4d-in-men-a-functional-transcranial-doppler-ultrasound-study
#3
Marietta Papadatou-Pastou, Maryanne Martin
The adequacy of three competing theories of hormonal effects on cerebral laterality are compared using functional transcranial Doppler sonography (fTCD). Thirty-three adult males participated in the study (21 left-handers). Cerebral lateralization was measured by fTCD using an extensively validated word generation task. Adult salivary testosterone (T) and cortisol (C) concentrations were measured by luminescence immunoassay and prenatal T exposure was indirectly estimated by the somatic marker of 2nd to 4th digit length ratio (2D:4D)...
January 11, 2017: Brain and Language
https://www.readbyqxmd.com/read/28086142/visual-statistical-learning-is-related-to-natural-language-ability-in-adults-an-erp-study
#4
Jerome Daltrozzo, Samantha N Emerson, Joanne Deocampo, Sonia Singh, Marjorie Freggens, Lee Branum-Martin, Christopher M Conway
Statistical learning (SL) is believed to enable language acquisition by allowing individuals to learn regularities within linguistic input. However, neural evidence supporting a direct relationship between SL and language ability is scarce. We investigated whether there are associations between event-related potential (ERP) correlates of SL and language abilities while controlling for the general level of selective attention. Seventeen adults completed tests of visual SL, receptive vocabulary, grammatical ability, and sentence completion...
January 10, 2017: Brain and Language
https://www.readbyqxmd.com/read/28039735/language-control-in-bilingual-adults-with-and-without-history-of-mild-traumatic-brain-injury
#5
Ileana Ratiu, Tamiko Azuma
Adults with a history of traumatic brain injury often show deficits in executive functioning (EF), including the ability to inhibit, switch, and attend to tasks. These abilities are critical for language processing in bilinguals. This study examined the effect of mild traumatic brain injury (mTBI) on EF and language processing in bilinguals using behavioral and eye-tracking measures. Twenty-two bilinguals with a history of mTBI and twenty healthy control bilinguals were administered executive function and language processing tasks...
December 28, 2016: Brain and Language
https://www.readbyqxmd.com/read/28013040/affective-speech-prosody-perception-and-production-in-stroke-patients-with-left-hemispheric-damage-and-healthy-controls
#6
Joan H Leung, Suzanne C Purdy, Lynette J Tippett, Sylvia H S Leão
PURPOSE: 'Affective prosody' defines the supra-segmental features of speech that, when manipulated, can change the type and intensity of emotion conveyed by the speaker. Although the right hemisphere is predominantly linked to the processing of affective prosodic cues, existing literature also suggests that damage to the left hemisphere can result in similar deficits. This study aims to demonstrate, and add to the evidence, that patients with left-hemisphere injury experience difficulties with affective prosodic perception and production, measured via a new combination of assessments and analyses...
December 22, 2016: Brain and Language
https://www.readbyqxmd.com/read/27951437/engagement-of-the-left-extrastriate-body-area-during-body-part-metaphor-comprehension
#7
Simon Lacey, Randall Stilla, Gopikrishna Deshpande, Sinan Zhao, Careese Stephens, Kelly McCormick, David Kemmerer, K Sathian
Grounded cognition explanations of metaphor comprehension predict activation of sensorimotor cortices relevant to the metaphor's source domain. We tested this prediction for body-part metaphors using functional magnetic resonance imaging while participants heard sentences containing metaphorical or literal references to body parts, and comparable control sentences. Localizer scans identified body-part-specific motor, somatosensory and visual cortical regions. Both subject- and item-wise analyses showed that, relative to control sentences, metaphorical but not literal sentences evoked limb metaphor-specific activity in the left extrastriate body area (EBA), paralleling the EBA's known visual limb-selectivity...
December 9, 2016: Brain and Language
https://www.readbyqxmd.com/read/27912072/lexical-retrieval-and-semantic-memory-in-parkinson-s-disease-the-question-of-noun-and-verb-dissociation
#8
Henrique Salmazo-Silva, Maria Alice de Mattos Pimenta Parente, Maria Sheila Rocha, Roberta Roque Baradel, André M Cravo, João Ricardo Sato, Fabio Godinho, Maria Teresa Carthery-Goulart
The dissociation between the processing of verbs and nouns has been debated in light of the Embodied Cognition Theory (EC). The objective of this paper is to verify how action and verb processing deficits of PD patients are modulated by different tasks with different cognitive demands. Action and object lexical-semantic processing was evaluated in patients with Parkinson's Disease (PD) and cognitively healthy controls through three different tasks (verbal fluency, naming and semantic association). Compared to controls, PD patients presented worse performance in naming actions and in the two semantic association tasks (action/object)...
November 29, 2016: Brain and Language
https://www.readbyqxmd.com/read/27898341/tracking-competition-and-cognitive-control-during-language-comprehension-with-multi-voxel-pattern-analysis
#9
Elizabeth Musz, Sharon L Thompson-Schill
To successfully comprehend a sentence that contains a homonym, readers must select the ambiguous word's context-appropriate meaning. The outcome of this process is influenced both by top-down contextual support and bottom-up, word-specific characteristics. We examined how these factors jointly affect the neural signatures of lexical ambiguity resolution. We measured the similarity between multi-voxel patterns evoked by the same homonym in two distinct linguistic contexts: once after subjects read sentences that biased interpretation toward each homonym's most frequent, dominant meaning, and again after interpretation was biased toward a weaker, subordinate meaning...
November 26, 2016: Brain and Language
https://www.readbyqxmd.com/read/27894006/distinct-patterns-of-imprecise-consonant-articulation-among-parkinson-s-disease-progressive-supranuclear-palsy-and-multiple-system-atrophy
#10
Tereza Tykalova, Jan Rusz, Jiri Klempir, Roman Cmejla, Evzen Ruzicka
Distinct speech characteristics that may aid in differentiation between Parkinson's disease (PD), progressive supranuclear palsy (PSP) and multiple system atrophy (MSA) remain tremendously under-explored. Here, the patterns and degree of consonant articulation deficits across voiced and voiceless stop plosives in 16 PD, 16 PSP, 16 MSA and 16 healthy control speakers were evaluated using acoustic and perceptual methods. Imprecise consonant articulation was observed across all Parkinsonian groups. Voice onset time of voiceless plosives was more prolonged in both PSP and MSA compared to PD, presumably due to greater severity of dysarthria and slower articulation rate...
November 25, 2016: Brain and Language
https://www.readbyqxmd.com/read/27912073/dissociable-substrates-underlie-the-production-of-abstract-and-concrete-nouns
#11
Katheryn A Q Cousins, Sharon Ash, David J Irwin, Murray Grossman
No abstract text is available yet for this article.
February 2017: Brain and Language
https://www.readbyqxmd.com/read/27898342/voice-sensitive-brain-networks-encode-talker-specific-phonetic-detail
#12
Emily B Myers, Rachel M Theodore
The speech stream simultaneously carries information about talker identity and linguistic content, and the same acoustic property (e.g., voice-onset-time, or VOT) may be used for both purposes. Separable neural networks for processing talker identity and phonetic content have been identified, but it is unclear how a singular acoustic property is parsed by the neural system for talker identification versus phonetic processing. In the current study, listeners were exposed to two talkers with characteristically different VOTs...
February 2017: Brain and Language
https://www.readbyqxmd.com/read/27838547/neural-substrates-of-sublexical-processing-for-spelling
#13
Andrew T DeMarco, Stephen M Wilson, Kindle Rising, Steven Z Rapcsak, Pélagie M Beeson
We used fMRI to examine the neural substrates of sublexical phoneme-grapheme conversion during spelling in a group of healthy young adults. Participants performed a writing-to-dictation task involving irregular words (e.g., choir), plausible nonwords (e.g., kroid), and a control task of drawing familiar geometric shapes (e.g., squares). Written production of both irregular words and nonwords engaged a left-hemisphere perisylvian network associated with reading/spelling and phonological processing skills. Effects of lexicality, manifested by increased activation during nonword relative to irregular word spelling, were noted in anterior perisylvian regions (posterior inferior frontal gyrus/operculum/precentral gyrus/insula), and in left ventral occipito-temporal cortex...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27833037/atypical-neural-synchronization-to-speech-envelope-modulations-in-dyslexia
#14
Astrid De Vos, Sophie Vanvooren, Jolijn Vanderauwera, Pol Ghesquière, Jan Wouters
A fundamental deficit in the synchronization of neural oscillations to temporal information in speech could underlie phonological processing problems in dyslexia. In this study, the hypothesis of a neural synchronization impairment is investigated more specifically as a function of different neural oscillatory bands and temporal information rates in speech. Auditory steady-state responses to 4, 10, 20 and 40Hz modulations were recorded in normal reading and dyslexic adolescents to measure neural synchronization of theta, alpha, beta and low-gamma oscillations to syllabic and phonemic rate information...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27821280/the-hearing-ear-is-always-found-close-to-the-speaking-tongue-review-of-the-role-of-the-motor-system-in-speech-perception
#15
REVIEW
Jeremy I Skipper, Joseph T Devlin, Daniel R Lametti
Does "the motor system" play "a role" in speech perception? If so, where, how, and when? We conducted a systematic review that addresses these questions using both qualitative and quantitative methods. The qualitative review of behavioural, computational modelling, non-human animal, brain damage/disorder, electrical stimulation/recording, and neuroimaging research suggests that distributed brain regions involved in producing speech play specific, dynamic, and contextually determined roles in speech perception...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27810647/investigating-the-feasibility-of-using-transcranial-direct-current-stimulation-to-enhance-fluency-in-people-who-stutter
#16
Jennifer Chesters, Kate E Watkins, Riikka Möttönen
Developmental stuttering is a disorder of speech fluency affecting 1% of the adult population. Long-term reductions in stuttering are difficult for adults to achieve with behavioural therapies. We investigated whether a single session of transcranial direct current stimulation (TDCS) could improve fluency in people who stutter (PWS). In separate sessions, either anodal TDCS (1mA for 20min) or sham stimulation was applied over the left inferior frontal cortex while PWS read sentences aloud. Fluency was induced during the stimulation period by using choral speech, that is, participants read in unison with another speaker...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27810646/the-unbridged-gap-between-clinical-diagnosis-and-contemporary-research-on-aphasia-a-short-discussion-on-the-validity-and-clinical-utility-of-taxonomic-categories
#17
Dimitrios S Kasselimis, Panagiotis G Simos, Christos Peppas, Ioannis Evdokimidis, Constantin Potagas
Even if the traditional aphasia classification is continuously questioned by many scholars, it remains widely accepted among clinicians and included in textbooks as the gold standard. The present study aims to investigate the validity and clinical utility of this taxonomy. For this purpose, 65 left-hemisphere stroke patients were assessed and classified with respect to aphasia type based on performance on a Greek adaptation of the Boston Diagnostic Aphasia Examination. MRI and/or CT scans were obtained for each patient and lesions were identified and coded according to location...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27792887/cortico-striatal-language-pathways-dynamically-adjust-for-syntactic-complexity-a-computational-study
#18
Krisztina Szalisznyó, David Silverstein, Marc Teichmann, Hugues Duffau, Anja Smits
A growing body of literature supports a key role of fronto-striatal circuits in language perception. It is now known that the striatum plays a role in engaging attentional resources and linguistic rule computation while also serving phonological short-term memory capabilities. The ventral semantic and the dorsal phonological stream dichotomy assumed for spoken language processing also seems to play a role in cortico-striatal perception. Based on recent studies that correlate deep Broca-striatal pathways with complex syntax performance, we used a previously developed computational model of frontal-striatal syntax circuits and hypothesized that different parallel language pathways may contribute to canonical and non-canonical sentence comprehension separately...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27701006/incorporation-of-feedback-during-beat-synchronization-is-an-index-of-neural-maturation-and-reading-skills
#19
Kali Woodruff Carr, Ahren B Fitzroy, Adam Tierney, Travis White-Schwoch, Nina Kraus
Speech communication involves integration and coordination of sensory perception and motor production, requiring precise temporal coupling. Beat synchronization, the coordination of movement with a pacing sound, can be used as an index of this sensorimotor timing. We assessed adolescents' synchronization and capacity to correct asynchronies when given online visual feedback. Variability of synchronization while receiving feedback predicted phonological memory and reading sub-skills, as well as maturation of cortical auditory processing; less variable synchronization during the presence of feedback tracked with maturation of cortical processing of sound onsets and resting gamma activity...
January 2017: Brain and Language
https://www.readbyqxmd.com/read/27694017/subjective-experience-of-inner-speech-in-aphasia-preliminary-behavioral-relationships-and-neural-correlates
#20
Mackenzie E Fama, William Hayward, Sarah F Snider, Rhonda B Friedman, Peter E Turkeltaub
Many individuals with aphasia describe anomia with comments like "I know it but I can't say it." The exact meaning of such phrases is unclear. We hypothesize that at least two discrete experiences exist: the sense of (1) knowing a concept, but failing to find the right word, and (2) saying the correct word internally but not aloud (successful inner speech, sIS). We propose that sIS reflects successful lexical access; subsequent overt anomia indicates post-lexical output deficits. In this pilot study, we probed the subjective experience of anomia in 37 persons with aphasia...
January 2017: Brain and Language
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