Skip to Main content Skip to Navigation
Journal articles

Reduced Verbal Fluency following Subthalamic Deep Brain Stimulation: A Frontal-Related Cognitive Deficit?

Abstract : OBJECTIVE: The decrease in verbal fluency in patients with Parkinson's disease (PD) undergoing subthalamic nucleus deep brain stimulation (STN-DBS) is usually assumed to reflect a frontal lobe-related cognitive dysfunction, although evidence for this is lacking. METHODS: To explore its underlying mechanisms, we combined neuropsychological, psychiatric and motor assessments with an examination of brain metabolism using F-18 fluorodeoxyglucose positron emission tomography, in 26 patients with PD, 3 months before and after surgery. We divided these patients into two groups, depending on whether or not they exhibited a postoperative deterioration in either phonemic (10 patients) or semantic (8 patients) fluency. We then compared the STN-DBS groups with and without verbal deterioration on changes in clinical measures and brain metabolism. RESULTS: We did not find any neuropsychological change supporting the presence of an executive dysfunction in patients with a deficit in either phonemic or semantic fluency. Similarly, a comparison of patients with or without impaired fluency on brain metabolism failed to highlight any frontal areas involved in cognitive functions. However, greater changes in cognitive slowdown and apathy were observed in patients with a postoperative decrease in verbal fluency. CONCLUSIONS: These results suggest that frontal lobe-related cognitive dysfunction could play only a minor role in the postoperative impairment of phonemic or semantic fluency, and that cognitive slowdown and apathy could have a more decisive influence. Furthermore, the phonemic and semantic impairments appeared to result from the disturbance of distinct mechanisms.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-01214568
Contributor : Ltsi Equipe Medicis Connect in order to contact the contributor
Submitted on : Monday, October 12, 2015 - 3:23:16 PM
Last modification on : Wednesday, May 12, 2021 - 10:22:02 AM

Links full text

Identifiers

`

Citation

Jean-François Houvenaghel, Florence Le Jeune, Thibaut Dondaine, Aurore Esquevin, Gabriel Hadrien Robert, et al.. Reduced Verbal Fluency following Subthalamic Deep Brain Stimulation: A Frontal-Related Cognitive Deficit?. PLoS ONE, Public Library of Science, 2015, 10 (10), pp.e0140083. ⟨10.1371/journal.pone.0140083⟩. ⟨hal-01214568⟩

Share

Metrics

Record views

1404