MRI anatomical mapping and direct stereotactic targeting in the subthalamic region: functional and anatomical correspondence in Parkinson’s disease |
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Authors: | Jean-Jacques Lemaire Jérôme Coste Lemlih Ouchchane Simone Hemm Philippe Derost Miguel Ulla Séverine Siadoux Jean Gabrillargues Franck Durif Jean Chazal |
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Institution: | 1. Service de Neurochirurgie A, CHU Clermont-Ferrand, H?pital Gabriel Montpied, Clermont-Ferrand, 63003, France 5. Inserm, ERI 14, Clermont-Ferrand, 63001, France 4. Unité de Bio statistiques, télématique et traitement d’image, Univ Clermont 1, UFR Médecine, Clermont-Ferrand, 63001, France 2. Service de Neurologie A, CHU Clermont-Ferrand, H?pital Gabriel Montpied, Clermont-Ferrand, 63003, France 3. Service de Radiologie A, CHU Clermont-Ferrand, H?pital Gabriel Montpied, Clermont-Ferrand, 63003, France
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Abstract: | Object Relationships between clinical effects, anatomy, and electrophysiology are not fully understood in DBS of the subthalamic
region in Parkinson’s disease. We proposed an anatomic study based on direct image-guided stereotactic surgery with a multiple
source data analysis.
Materials and Methods A manual anatomic mapping was realized on coronal 1.5-Tesla MRI of 15 patients. Biological data were collected under local
anesthesia: the spontaneous neuron activities and the clinical efficiency and the appearance of adverse effects. They were
related to relevant current values (mA), the benefit threshold (bt, minimal current leading an clear efficiency), the adverse
effect threshold (at, minimal current leading an adverse effect) and the stimulation margin (sm = at − bt); they were matched
with anatomy.
Results We found consistent relationships between anatomy and biological data. The optimal stimulation parameters (low bt + high
sm) were noted in the dorsolateral STN. The highest spontaneous neuron activity was found in the ventromedial STN. Dorsolateral
(sensorimotor) STN seems the main DBS effector. The highest spontaneous neuron activity seems related to the anterior (rostral)
ventromedial (limbic) STN.
Conclusion 1.5 Tesla images provide sufficiently detailed subthalamic anatomy for image-guided stereotactic surgery and may aid in understanding
DBS mechanisms. |
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Keywords: | Image-guided surgery STN-DBS Stereotaxy Brain mapping |
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