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Reduced phonemic fluency in progressive supranuclear palsy is due to dysfunction of dominant BA6.
- Source :
-
Frontiers in aging neuroscience [Front Aging Neurosci] 2022 Sep 08; Vol. 14, pp. 969875. Date of Electronic Publication: 2022 Sep 08 (Print Publication: 2022). - Publication Year :
- 2022
-
Abstract
- Background: Reduced phonemic fluency is extremely frequent in progressive supranuclear palsy (PSP), but its neural correlate is yet to be defined.<br />Objective: We explored the hypothesis that poor fluency in PSP might be due to neurodegeneration within a dominant frontal circuit known to be involved in speech fluency, including the opercular area, the superior frontal cortex (BA6), and the frontal aslant tract connecting these two regions.<br />Methods: We correlated performance on a letter fluency task (F, A, and S, 60 s for each letter) with brain metabolism as measured with Fluoro-deoxy-glucose Positron Emission Tomography, using Statistical Parametric Mapping, in 31 patients with PSP.<br />Results: Reduced letter fluency was associated with significant hypometabolism at the level of left BA6.<br />Conclusion: Our finding is the first evidence that in PSP, as in other neurogical disorders, poor self-initiated, effortful verbal retrieval appears to be linked to dysfunction of the dominant opercular-aslant-BA6 circuit.<br />Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.<br /> (Copyright © 2022 Isella, Licciardo, Ferri, Crivellaro, Morzenti, Appollonio and Ferrarese.)
Details
- Language :
- English
- ISSN :
- 1663-4365
- Volume :
- 14
- Database :
- MEDLINE
- Journal :
- Frontiers in aging neuroscience
- Publication Type :
- Academic Journal
- Accession number :
- 36158541
- Full Text :
- https://doi.org/10.3389/fnagi.2022.969875