Abstract
Previous studies have postulated that the amount of brain reorganization following peripheral injuries may be correlated with negative symptoms or consequences. However, it is unknown whether restoring effective limb function may then be associated with further changes in the expression of this reorganization. Recently, targeted reinnervation (TR), a surgical technique that restores a direct neural connection from amputated sensorimotor nerves to new peripheral targets such as muscle, has been successfully applied to upper-limb amputees. It has been shown to be effective in restoring both peripheral motor and sensory functions via the reinnervated nerves as soon as a few months after the surgery. However, it was unclear whether TR could also restore normal cortical motor representations for control of the missing limb. To answer this question, we used high-density electroencephalography (EEG) to localize cortical activity related to cued motor tasks generated by the intact and missing limb. Using a case study of 3 upper-limb amputees, 2 of whom went through pre and post-TR experiments, we present unique quantitative evidence for the re-mapping of motor representations for the missing limb closer to their original locations following TR. This provides evidence that an effective restoration of peripheral function from TR can be linked to the return of more normal cortical expression for the missing limb. Therefore, cortical mapping may be used as a potential guide for monitoring rehabilitation following peripheral injuries.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 498-506 |
| Number of pages | 9 |
| Journal | NeuroImage: Clinical |
| Volume | 3 |
| DOIs | |
| State | Published - Nov 22 2013 |
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Keywords
- Amputation
- Brain reorganization
- Cortical activity
- Electroencephalography
- Motor
- Targeted reinnervation
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging
- Neurology
- Clinical Neurology
- Cognitive Neuroscience
Cite this
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Cortical motor activity and reorganization following upper-limb amputation and subsequent targeted reinnervation. / Chen, Albert; Yao, Jun; Kuiken, Todd A; Dewald, Julius P A.
In: NeuroImage: Clinical, Vol. 3, 22.11.2013, p. 498-506.Research output: Contribution to journal › Article
TY - JOUR
T1 - Cortical motor activity and reorganization following upper-limb amputation and subsequent targeted reinnervation
AU - Chen, Albert
AU - Yao, Jun
AU - Kuiken, Todd A
AU - Dewald, Julius P A
PY - 2013/11/22
Y1 - 2013/11/22
N2 - Previous studies have postulated that the amount of brain reorganization following peripheral injuries may be correlated with negative symptoms or consequences. However, it is unknown whether restoring effective limb function may then be associated with further changes in the expression of this reorganization. Recently, targeted reinnervation (TR), a surgical technique that restores a direct neural connection from amputated sensorimotor nerves to new peripheral targets such as muscle, has been successfully applied to upper-limb amputees. It has been shown to be effective in restoring both peripheral motor and sensory functions via the reinnervated nerves as soon as a few months after the surgery. However, it was unclear whether TR could also restore normal cortical motor representations for control of the missing limb. To answer this question, we used high-density electroencephalography (EEG) to localize cortical activity related to cued motor tasks generated by the intact and missing limb. Using a case study of 3 upper-limb amputees, 2 of whom went through pre and post-TR experiments, we present unique quantitative evidence for the re-mapping of motor representations for the missing limb closer to their original locations following TR. This provides evidence that an effective restoration of peripheral function from TR can be linked to the return of more normal cortical expression for the missing limb. Therefore, cortical mapping may be used as a potential guide for monitoring rehabilitation following peripheral injuries.
AB - Previous studies have postulated that the amount of brain reorganization following peripheral injuries may be correlated with negative symptoms or consequences. However, it is unknown whether restoring effective limb function may then be associated with further changes in the expression of this reorganization. Recently, targeted reinnervation (TR), a surgical technique that restores a direct neural connection from amputated sensorimotor nerves to new peripheral targets such as muscle, has been successfully applied to upper-limb amputees. It has been shown to be effective in restoring both peripheral motor and sensory functions via the reinnervated nerves as soon as a few months after the surgery. However, it was unclear whether TR could also restore normal cortical motor representations for control of the missing limb. To answer this question, we used high-density electroencephalography (EEG) to localize cortical activity related to cued motor tasks generated by the intact and missing limb. Using a case study of 3 upper-limb amputees, 2 of whom went through pre and post-TR experiments, we present unique quantitative evidence for the re-mapping of motor representations for the missing limb closer to their original locations following TR. This provides evidence that an effective restoration of peripheral function from TR can be linked to the return of more normal cortical expression for the missing limb. Therefore, cortical mapping may be used as a potential guide for monitoring rehabilitation following peripheral injuries.
KW - Amputation
KW - Brain reorganization
KW - Cortical activity
KW - Electroencephalography
KW - Motor
KW - Targeted reinnervation
UR - http://www.scopus.com/inward/record.url?scp=84887850093&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887850093&partnerID=8YFLogxK
U2 - 10.1016/j.nicl.2013.10.001
DO - 10.1016/j.nicl.2013.10.001
M3 - Article
C2 - 24273732
AN - SCOPUS:84887850093
VL - 3
SP - 498
EP - 506
JO - NeuroImage: Clinical
JF - NeuroImage: Clinical
SN - 2213-1582
ER -