Epilepsy research · 2023
Benefits of vagus nerve stimulation on psychomotor functions in patients with severe drug-resistant epilepsy.
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Bordes Alice, El Bendary Yehia, Goudard Gwen, Masson Véronique, Gourfinkel-An Isabelle, Mathon Bertrand
Аннотация
PURPOSE: Patients with severe drug-resistant epilepsy (DRE) experience psychomotor disorders. Our study aimed to assess the psychomotor outcomes after vagus nerve stimulation (VNS) in this population.
METHODS: We prospectively evaluated psychomotor function in 17 adult patients with severe DRE who were referred for VNS. Psychomotor functions were examined, in the preoperative period and at 18 months post-surgery, by a psychomotor therapist using a full set of the following specific tests: the Rey-Osterrieth complex figure (ROCF) test, the Zazzo's cancelation task (ZCT), the Piaget-Head test and the paired images test.
RESULTS: At 18 months post-VNS surgery, the Piaget-head scores increased by 3 points (p = 0.008) compared to baseline. Performances were also improved for ROCF test both in copy (+2.4 points, p = 0.001) and recall (+2.0 points, p = 0.008) tasks and for the paired images test (accuracy index: +28.6 %, p = 0.03). Regarding the ZCT findings, the efficiency index increased in both single (+16 %, p = 0.005) and dual (+17.1 %, p < 0.001) tasks. QoL improved in 88.2 % of patients.
CONCLUSIONS: Patients with severe DRE treated with VNS experienced improved performance in terms of global psychomotor functions. Perceptual organization, visuospatial memory, laterality awareness, sustained attention, concentration, visual scanning, and inhibition were significantly improved.
METHODS: We prospectively evaluated psychomotor function in 17 adult patients with severe DRE who were referred for VNS. Psychomotor functions were examined, in the preoperative period and at 18 months post-surgery, by a psychomotor therapist using a full set of the following specific tests: the Rey-Osterrieth complex figure (ROCF) test, the Zazzo's cancelation task (ZCT), the Piaget-Head test and the paired images test.
RESULTS: At 18 months post-VNS surgery, the Piaget-head scores increased by 3 points (p = 0.008) compared to baseline. Performances were also improved for ROCF test both in copy (+2.4 points, p = 0.001) and recall (+2.0 points, p = 0.008) tasks and for the paired images test (accuracy index: +28.6 %, p = 0.03). Regarding the ZCT findings, the efficiency index increased in both single (+16 %, p = 0.005) and dual (+17.1 %, p < 0.001) tasks. QoL improved in 88.2 % of patients.
CONCLUSIONS: Patients with severe DRE treated with VNS experienced improved performance in terms of global psychomotor functions. Perceptual organization, visuospatial memory, laterality awareness, sustained attention, concentration, visual scanning, and inhibition were significantly improved.