Thalamic Nuclei and Thalamocortical Pathways After Left Hemispheric Stroke and Their Association with Picture Naming

2021 ◽  
Author(s):  
Zafer Keser ◽  
Erin L. Meier ◽  
Melissa D. Stockbridge ◽  
Bonnie L. Breining ◽  
Rajani Sebastian ◽  
...  
Keyword(s):  
Picture Naming ◽  
Thalamic Nuclei ◽  
Hemispheric Stroke

Abstract P356: Wernicke’s Vertical Occipital Fasciculus in Post-Stroke Reading

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Zafer Keser ◽  
Erin L Meier ◽  
Melissa D Stockbridge ◽  
Bonnie L Breining ◽  
Rajani Sebastian ◽  
...  
Keyword(s):  
Oral Reading ◽  
Picture Naming ◽  
Diffusion Tensor ◽  
Critical Role ◽  
Preliminary Evidence ◽  
Boston Naming Test ◽  
Cortical Projection ◽  
Hemispheric Stroke ◽  
Partial Correlations ◽  
Language Areas

Introduction: The vertical-occipital fasciculus (VOF), which was initially described by Wernicke more than a century ago but recently rediscovered, connects visual association cortices to the posterior language areas. We hypothesized that the vertical-occipital fasciculus plays a critical role in reading. Methods: Thirty-two participants with subacute to chronic left hemispheric stroke leading to varying degrees of aphasia were enrolled in the study and underwent concurrent diffusion tensor imaging (DTI) and language assessment. Assessments included the Boston Diagnostic Aphasia Examination (BDAE) to assess oral reading and reading comprehension and the Boston Naming Test to assess picture naming. Two major cortico-cortical projection pathways, VOF, connected with posterior language cortices and frontal aslant tract (FAT), connecting anterior language areas, were mapped with deterministic tractography and quantified bilaterally. We conducted partial correlations between fractional anisotropy (FA) values of the tracts and reading and picture naming scores, controlling for age, education, and total lesion load. We corrected for multiple comparisons at the false discovery rate (FDR) (p<0.05). Results: FA of left VOF was found to be significantly correlated with BDAE total reading scores (r=0.49, p=0.004), and this remained significant after FDR correction (p=0.03). Although a significant correlation was seen between picture naming and left VOF FA (r=0.41, p=0.02), and right VOF FA (r=0.37, p=0.04), these associations were not significant after FDR correction (p>0.05). FAT FA values were not significantly associated with oral reading or picture naming tests. Conclusion: This study provides preliminary evidence that left VOF plays a potential role in reading after left hemispheric stroke.

Young Spanish-English Language Learners' Cognate Facilitation on Picture Naming

2016 ◽  
Vol 43 (Spring) ◽  
pp. 115-128 ◽  
Author(s):  
Lindsey Leacox ◽  
Carla Wood ◽  
Gretchen Sunderman ◽  
Christopher Schatschneider
Keyword(s):  
English Language Learners ◽  
Language Learners ◽  
Picture Naming ◽  
English Language

Lexical Access Problems Lead to Disfluencies in Speech

2010 ◽  
Vol 57 (3) ◽  
pp. 169-177 ◽  
Author(s):  
Robert J. Hartsuiker ◽  
Lies Notebaert
Keyword(s):  
Lexical Access ◽  
Picture Naming ◽  
Language Production ◽  
Line Drawings ◽  
Name Agreement ◽  
Access Problems ◽  
Agreement Condition

A picture naming experiment in Dutch tested whether disfluencies in speech can arise from difficulties in lexical access. Speakers described networks consisting of line drawings and paths connecting these drawings, and we manipulated picture name agreement. Consistent with our hypothesis, there were more pauses and more self-corrections in the low name agreement condition than the high name agreement condition, but there was no effect on repetitions. We also considered determiner frequency. There were more self-corrections and more repetitions when the picture name required the less frequent (neuter-gender) determiner “het” than the more frequent (common-gender) determiner “de”. These data suggest that difficulties in distinct stages of language production result in distinct patterns of disfluencies.

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