scholarly journals Phonotactic processing deficit following left-hemisphere stroke

Cortex ◽  
2018 ◽  
Vol 99 ◽  
pp. 346-357 ◽  
Author(s):  
Maryam Ghaleh ◽  
Laura M. Skipper-Kallal ◽  
Shihui Xing ◽  
Elizabeth Lacey ◽  
Iain DeWitt ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Processing Deficit ◽  
Left Hemisphere Stroke

Praxis Lateralization: Errors in Right and Left Hemisphere Stroke

Cortex ◽  
2001 ◽  
Vol 37 (2) ◽  
pp. 219-230 ◽  
Author(s):  
Brenda Hanna-Pladdy ◽  
Stephanie K. Daniels ◽  
Melanie A. Fieselman ◽  
Kenneth Thompson ◽  
Jennifer J. Vasterling ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Left Hemisphere Stroke

scholarly journals Strong conceptual ability reduces the effect of lexical impairments on verb retrieval in aphasia

2021 ◽  
Author(s):  
Haley C. Dresang ◽  
William D. Hula ◽  
Tessa Warren ◽  
Michael Walsh Dickey
Keyword(s):  
Left Hemisphere ◽  
Language Processing ◽  
Brain Injuries ◽  
Conceptual Processing ◽  
Action Processing ◽  
Processing Abilities ◽  
Conceptual Ability ◽  
Chronic Aphasia ◽  
Left Hemisphere Stroke ◽  
Open Question

Verb-retrieval impairments are pervasive deficits that can negatively impact communicative function for individuals living with aphasia. Unfortunately, the neurocognitive basis of these deficits remains poorly understood. One open question is the degree to which verb-retrieval impairments might be rooted in lexical- versus conceptual-processing deficits. These deficits can be co-present and correlated in people with aphasia, but they have also been found to be dissociated in patients with a variety of acquired brain injuries. This study examined the degree to which conceptual versus lexical action-processing abilities are impaired and may contribute to verb-retrieval impairments in adults with chronic aphasia due to left-hemisphere stroke. The results indicate that conceptual action processing can be impaired in aphasia and may contribute to verb-retrieval impairments. Furthermore, relatively unimpaired conceptual processing can ameliorate the influence of lexical impairments on verb-retrieval impairments. These findings are consistent with models in which conceptual representations play a key role in language processing and may be leveraged to improve verb retrieval in adults with chronic aphasia.

scholarly journals Regional Shape Abnormalities in Thalamus and Verbal Memory Impairment After Subcortical Infarction

2019 ◽  
Vol 33 (6) ◽  
pp. 476-485 ◽  
Author(s):  
Gang Liu ◽  
Xiaoqing Tan ◽  
Chao Dang ◽  
Shuangquan Tan ◽  
Shihui Xing ◽  
...  
Keyword(s):  
Left Hemisphere ◽  
Verbal Memory ◽  
Memory Impairment ◽  
Right Hemisphere ◽  
Brain Structures ◽  
Change Rate ◽  
Immediate Recall ◽  
Stroke Group ◽  
Left Hemisphere Stroke ◽  
Subcortical Infarction

Background. Subcortical infarcts can result in verbal memory impairment, but the potential underlying mechanisms remain unknown. Objective. We investigated the spatiotemporal deterioration patterns of brain structures in patients with subcortical infarction and identified the regions that contributed to verbal memory impairment. Methods. Cognitive assessment and structural magnetic resonance imaging were performed 1, 4, and 12 weeks after stroke onset in 28 left-hemisphere and 22 right-hemisphere stroke patients with subcortical infarction. Whole-brain volumetric analysis combined with a further-refined shape analysis was conducted to analyze longitudinal morphometric changes in brain structures and their relationship to verbal memory performance. Results. Between weeks 1 and 12, significant volume decreases in the ipsilesional basal ganglia, inferior white matter, and thalamus were found in the left-hemisphere stroke group. Among those 3 structures, only the change rate of the thalamus volume was significantly correlated with that in immediate recall. For the right-hemisphere stroke group, only the ipsilesional basal ganglia survived the week 1 to week 12 group comparison, but its change rate was not significantly correlated with the verbal memory change rate. Shape analysis of the thalamus revealed atrophies of the ipsilesional thalamic subregions connected to the prefrontal, temporal, and premotor cortices in the left-hemisphere stroke group and positive correlations between the rates of those atrophies and the change rate in immediate recall. Conclusions. Secondary damage to the thalamus, especially to the left subregions connected to specific cortices, may be associated with early verbal memory impairment following an acute subcortical infarct.

scholarly journals Reduced competition between tool action neighbors in left hemisphere stroke

Cortex ◽  
2019 ◽  
Vol 120 ◽  
pp. 269-283 ◽  
Author(s):  
Frank E. Garcea ◽  
Harrison Stoll ◽  
Laurel J. Buxbaum
Keyword(s):  
Left Hemisphere ◽  
Left Hemisphere Stroke

scholarly journals Perceptually Salient Sound Distortions and Apraxia of Speech: A Performance Continuum

2017 ◽  
Vol 26 (2S) ◽  
pp. 631-640 ◽  
Author(s):  
Katarina L. Haley ◽  
Adam Jacks ◽  
Jessica D. Richardson ◽  
Julie L. Wambaugh
Keyword(s):  
Left Hemisphere ◽  
Sound Production ◽  
Dynamic Performance ◽  
Speech Sound ◽  
Speaking Rate ◽  
Apraxia Of Speech ◽  
External Criterion ◽  
Syllable Duration ◽  
Left Hemisphere Stroke ◽  
A Performance

Purpose We sought to characterize articulatory distortions in apraxia of speech and aphasia with phonemic paraphasia and to evaluate the diagnostic validity of error frequency of distortion and distorted substitution in differentiating between these disorders. Method Study participants were 66 people with speech sound production difficulties after left-hemisphere stroke or trauma. They were divided into 2 groups on the basis of word syllable duration, which served as an external criterion for speaking rate in multisyllabic words and an index of likely speech diagnosis. Narrow phonetic transcriptions were completed for audio-recorded clinical motor speech evaluations, using 29 diacritic marks. Results Partial voicing and altered vowel tongue placement were common in both groups, and changes in consonant manner and place were also observed. The group with longer word syllable duration produced significantly more distortion and distorted-substitution errors than did the group with shorter word syllable duration, but variations were distributed on a performance continuum that overlapped substantially between groups. Conclusions Segment distortions in focal left-hemisphere lesions can be captured with a customized set of diacritic marks. Frequencies of distortions and distorted substitutions are valid diagnostic criteria for apraxia of speech, but further development of quantitative criteria and dynamic performance profiles is necessary for clinical utility.

scholarly journals Depression Symptoms in Chronic Left Hemisphere Stroke Are Related to Dorsolateral Prefrontal Cortex Damage

2016 ◽  
Vol 28 (4) ◽  
pp. 292-298 ◽  
Author(s):  
Kristopher Grajny ◽  
Harshini Pyata ◽  
Katherine Spiegel ◽  
Elizabeth H. Lacey ◽  
Shihui Xing ◽  
...  
Keyword(s):  
Prefrontal Cortex ◽  
Left Hemisphere ◽  
Dorsolateral Prefrontal Cortex ◽  
Depression Symptoms ◽  
Dorsolateral Prefrontal ◽  
Left Hemisphere Stroke

scholarly journals Critical brain regions for action recognition: lesion symptom mapping in left hemisphere stroke

Brain ◽  
2010 ◽  
Vol 133 (11) ◽  
pp. 3269-3280 ◽  
Author(s):  
Solène Kalénine ◽  
Laurel J. Buxbaum ◽  
Harry Branch Coslett
Keyword(s):  
Left Hemisphere ◽  
Action Recognition ◽  
Brain Regions ◽  
Lesion Symptom Mapping ◽  
Left Hemisphere Stroke
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