Electrophysiological differences between upper and lower limb movements in the human subthalamic nucleus.
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BORIS DOI
Date of Publication
May 2019
Publication Type
Article
Division/Institute
Contributor
Shah, Syed Ahmar | |
Fischer, Petra | |
Nygyuen, Khoa | |
Torrecillos, Flavie | |
Khawaldeh, Saed | |
Tan, Huiling | |
Pogosyan, Alek | |
Brown, Peter |
Subject(s)
Series
Clinical neurophysiology
ISSN or ISBN (if monograph)
1388-2457
Publisher
Elsevier
Language
English
Publisher DOI
PubMed ID
30903826
Uncontrolled Keywords
Description
OBJECTIVE
Functional processes in the brain are segregated in both the spatial and spectral domain. Motivated by findings reported at the cortical level in healthy participants we test the hypothesis in the basal ganglia of Parkinson's disease patients that lower frequency beta band activity relates to motor circuits associated with the upper limb and higher beta frequencies with lower limb movements.
METHODS
We recorded local field potentials (LFPs) from the subthalamic nucleus using segmented "directional" DBS leads, during which patients performed repetitive upper and lower limb movements. Movement-related spectral changes in the beta and gamma frequency-ranges and their spatial distributions were compared between limbs.
RESULTS
We found that the beta desynchronization during leg movements is characterised by a strikingly greater involvement of higher beta frequencies (24-31 Hz), regardless of whether this was contralateral or ipsilateral to the limb moved. The spatial distribution of limb-specific movement-related changes was evident at higher gamma frequencies.
CONCLUSION
Limb processing in the basal ganglia is differentially organised in the spectral and spatial domain and can be captured by directional DBS leads.
SIGNIFICANCE
These findings may help to refine the use of the subthalamic LFPs as a control signal for adaptive DBS and neuroprosthetic devices.
Functional processes in the brain are segregated in both the spatial and spectral domain. Motivated by findings reported at the cortical level in healthy participants we test the hypothesis in the basal ganglia of Parkinson's disease patients that lower frequency beta band activity relates to motor circuits associated with the upper limb and higher beta frequencies with lower limb movements.
METHODS
We recorded local field potentials (LFPs) from the subthalamic nucleus using segmented "directional" DBS leads, during which patients performed repetitive upper and lower limb movements. Movement-related spectral changes in the beta and gamma frequency-ranges and their spatial distributions were compared between limbs.
RESULTS
We found that the beta desynchronization during leg movements is characterised by a strikingly greater involvement of higher beta frequencies (24-31 Hz), regardless of whether this was contralateral or ipsilateral to the limb moved. The spatial distribution of limb-specific movement-related changes was evident at higher gamma frequencies.
CONCLUSION
Limb processing in the basal ganglia is differentially organised in the spectral and spatial domain and can be captured by directional DBS leads.
SIGNIFICANCE
These findings may help to refine the use of the subthalamic LFPs as a control signal for adaptive DBS and neuroprosthetic devices.
File(s)
| File | File Type | Format | Size | License | Publisher/Copright statement | Content | |
|---|---|---|---|---|---|---|---|
| Electrophysiological differences between upper and lower limb movements in the human subthalamic nucleus.pdf | text | Adobe PDF | 2.04 MB | published |