Transcranial Doppler Sonography in the Early Phase of Alzheimer's Disease

1992 ◽  
Vol 3 (1) ◽  
pp. 25-31 ◽  
Author(s):  
S. Bressi ◽  
MA. Volontè ◽  
M. Alberoni ◽  
N. Canal ◽  
M. Franceschi
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Transcranial Doppler ◽  
Early Phase ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography

Evaluation of Cerebral Vasoreactivity by SPECT and Transcranial Doppler Sonography using the Acetazolamide Test

1994 ◽  
Vol 33 (06) ◽  
pp. 239-243 ◽  
Author(s):  
F. Grünwald ◽  
P. Barzó ◽  
E. Ambrus ◽  
C. Menzel ◽  
A. Schomburg ◽  
...  
Keyword(s):  
Transcranial Doppler ◽  
Doppler Sonography ◽  
Transcranial Doppler Sonography ◽  
Transkranielle Dopplersonographie ◽  
99Mtc Hmpao ◽  
Cerebral Vasoreactivity

ZusammenfassungBei 29 Patienten (3 Kontrollpersonen, 26 Patienten mit zerebrovaskulärer Erkrankung) wurde prospektiv die Hirn-SPECT mit 99mTC-HMPAO und bei 20 Patienten (3 Kontrollpersonen, 17 Patienten mit ZVK) die transkranielle Dopplersonographie (TCD) vor und nach i. v. Gabe von Azetazolamid durchgeführt. Die Sensitivität der Hirn-SPECT erhöhte sich mit Azetazolamid von 62% auf 77%. Bei Patienten mit reversiblem neurologischem Defizit wurde eine Verbesserung von 50% auf 71 %, bei Patienten mit persistierendem Defizit von 75% auf 83% beobachtet. Die Ergebnisse der Hirn-SPECT und der TCD stimmten in der Beurteilung der zerebro-vaskulären Reservekapazität in 91% der Hemisphären überein. Die Korrelation zwischen den beiden Methoden war statistisch signifikant.

Investigating multidimensionality of language lateralisation in left and right handed adults: an update on Woodhead et al. 2019

2020 ◽  
Author(s):  
Zoe Victoria Joan Woodhead ◽  
Paul Andrew Thompson ◽  
Emma Karlsson ◽  
Dorothy Vera Margaret Bishop
Keyword(s):  
Transcranial Doppler ◽  
Structural Equation Modelling ◽  
Structural Equation ◽  
Doppler Sonography ◽  
Factor Model ◽  
Transcranial Doppler Sonography ◽  
Group Level ◽  
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 lateralisation for different language tasks. However, it had too few left handers (N=7) to reach any 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 lateralisation would be weaker at the group level in left than right handers; and 2) that left handers would show weaker covariance in lateralisation between tasks, supporting a two factor model.All participants performed the same protocol as in our previous paper: lateralisation 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.

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