scholarly journals Language lateralization of hearing native signers: A functional transcranial Doppler sonography (fTCD) study of speech and sign production

2015 ◽  
Vol 151 ◽  
pp. 23-34 ◽  
Author(s):  
Eva Gutierrez-Sigut ◽  
Richard Daws ◽  
Heather Payne ◽  
Jonathan Blott ◽  
Chloë Marshall ◽  
...  
Keyword(s):  
Transcranial Doppler ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Language Lateralization ◽  
Native Signers ◽  
Functional Transcranial Doppler Sonography

scholarly journals Reproducibility of Functional Transcranial Doppler Sonography in Determining Hemispheric Language Lateralization

Stroke ◽  
1998 ◽  
Vol 29 (6) ◽  
pp. 1155-1159 ◽  
Author(s):  
S. Knecht ◽  
M. Deppe ◽  
E.-B. Ringelstein ◽  
M. Wirtz ◽  
H. Lohmann ◽  
...  
Keyword(s):  
Transcranial Doppler ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Language Lateralization ◽  
Functional Transcranial Doppler Sonography

scholarly journals Noninvasive Determination of Language Lateralization by Functional Transcranial Doppler Sonography

Stroke ◽  
1998 ◽  
Vol 29 (1) ◽  
pp. 82-86 ◽  
Author(s):  
S. Knecht ◽  
M. Deppe ◽  
A. Ebner ◽  
H. Henningsen ◽  
T. Huber ◽  
...  
Keyword(s):  
Transcranial Doppler ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Language Lateralization ◽  
Functional Transcranial Doppler Sonography

scholarly journals Testing the unitary theory of language lateralization using functional transcranial Doppler sonography in adults

2019 ◽  
Vol 6 (3) ◽  
pp. 181801 ◽  
Author(s):  
Z. V. J. Woodhead ◽  
A. R. Bradshaw ◽  
A. C. Wilson ◽  
P. A. Thompson ◽  
D. V. M. Bishop
Keyword(s):  
Transcranial Doppler ◽  
Structural Equation ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Hemispheric Dominance ◽  
Unitary Theory ◽  
Language Lateralization ◽  
Equation Analysis ◽  
Functional Transcranial Doppler Sonography ◽  
Error Of Measurement

Hemispheric dominance for language can vary from task to task, but it is unclear if this reflects error of measurement or independent lateralization of different language systems. We used functional transcranial Doppler sonography to assess language lateralization within the middle cerebral artery territory in 37 adults (seven left-handers) on six tasks, each given on two occasions. Tasks taxed different aspects of language function. A pre-registered structural equation analysis was used to compare models of means and covariances. For most people, a single lateralized factor explained most of the covariance between tasks. A minority, however, showed dissociation of asymmetry, giving a second factor. This was mostly derived from a receptive task, which was highly reliable but not lateralized. The results suggest that variation in the strength of language lateralization reflects true individual differences and not just error of measurement. The inclusion of several tasks in a laterality battery makes it easier to detect cases of atypical asymmetry.

scholarly journals An updated investigation of the multidimensional structure of language lateralization in left- and right-handed adults: a test–retest functional transcranial Doppler sonography study with six language tasks

2021 ◽  
Vol 8 (2) ◽  
pp. 200696
Author(s):  
Z. V. J. Woodhead ◽  
P. A. Thompson ◽  
E. M. Karlsson ◽  
D. V. M. Bishop
Keyword(s):  
Transcranial Doppler ◽  
Structural Equation ◽  
Doppler Sonography ◽  
Factor Model ◽  
Transcranial Doppler Sonography ◽  
Group Level ◽  
Language Lateralization ◽  
Equation Modelling ◽  
Left And Right ◽  
Functional Transcranial Doppler Sonography

A previous study we reported in this journal suggested that left and right-handers may differ in their patterns of lateralization for different language tasks (Woodhead et al. 2019 R. Soc. Open Sci. 6 , 181801. ( doi:10.1098/rsos.181801 )). However, it had too few left-handers ( N = 7) to reach firm conclusions. For this update paper, further participants were added to the sample to create separate groups of left- ( N = 31) and right-handers ( N = 43). Two hypotheses were tested: (1) that lateralization would be weaker at the group level in left-than right-handers; and (2) that left-handers would show weaker covariance in lateralization between tasks, supporting a two-factor model. All participants performed the same protocol as in our previous paper: lateralization was measured using functional transcranial Doppler sonography during six different language tasks, on two separate testing sessions. The results supported hypothesis 1, with significant differences in laterality between groups for four out of six tasks. For hypothesis 2, structural equation modelling showed that there was stronger evidence for a two-factor model in left than right-handers; furthermore, examination of the factor loadings suggested that the pattern of laterality across tasks may also differ between handedness groups. These results expand on what is known about the differences in laterality between left- and right-handers.

scholarly journals Language lateralization in children using functional transcranial Doppler sonography

2010 ◽  
Vol 52 (4) ◽  
pp. 331-336 ◽  
Author(s):  
ANJA HAAG ◽  
NICOLA MOELLER ◽  
SUSANNE KNAKE ◽  
ANKE HERMSEN ◽  
WOLFGANG H OERTEL ◽  
...  
Keyword(s):  
Transcranial Doppler ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Language Lateralization ◽  
Functional Transcranial Doppler Sonography
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