Reaffirming the link between chronic phantom limb pain and maintained missing hand representation
Phantom limb pain (PLP) is commonly considered to be a result of maladaptive brain plasticity. This model proposes that PLP is mainly caused by reorganisation in the primary somatosensory cortex, presumably characterised by functional degradation of the missing hand representation and remapping of o...
| Main Authors: | , , , |
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| Formato: | Journal article |
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Elsevier
2018
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| _version_ | 1826306364499034112 |
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| author | Kikkert, S Johansen-Berg, H Tracey, I Makin, TR |
| author_facet | Kikkert, S Johansen-Berg, H Tracey, I Makin, TR |
| author_sort | Kikkert, S |
| collection | OXFORD |
| description | Phantom limb pain (PLP) is commonly considered to be a result of maladaptive brain plasticity. This model proposes that PLP is mainly caused by reorganisation in the primary somatosensory cortex, presumably characterised by functional degradation of the missing hand representation and remapping of other body part representations. In the current study, we replicate our previous results by showing that chronic PLP correlates with maintained representation of the missing hand in the primary sensorimotor missing hand cortex. We asked unilateral upper-limb amputees to move their phantom hand, lips or other body parts and measured the associated neural responses using functional magnetic resonance imaging (fMRI). We confirm that amputees suffering from worse chronic PLP have stronger activity in the primary sensorimotor missing hand cortex while performing phantom hand movements. We find no evidence of lip representation remapping into the missing hand territory, as assessed by measuring activity in the primary sensorimotor missing hand cortex during lip movements. We further show that the correlation between chronic PLP and maintained representation of the missing hand cannot be explained by the experience of chronic non-painful phantom sensations or compensatory usage of the residual arm or an artificial arm (prosthesis). Together, our results reaffirm a likely relationship between persistent peripheral inputs pertaining to the missing hand representation and chronic PLP. Our findings emphasise a need to further study the role of peripheral inputs from the residual nerves to better understand the mechanisms underlying chronic PLP. |
| first_indexed | 2024-03-07T06:46:50Z |
| format | Journal article |
| id | oxford-uuid:fb215932-fea4-4ac8-96c6-25020f68143b |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:46:50Z |
| publishDate | 2018 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oxford-uuid:fb215932-fea4-4ac8-96c6-25020f68143b2022-03-27T13:11:45ZReaffirming the link between chronic phantom limb pain and maintained missing hand representationJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:fb215932-fea4-4ac8-96c6-25020f68143bSymplectic Elements at OxfordElsevier2018Kikkert, SJohansen-Berg, HTracey, IMakin, TRPhantom limb pain (PLP) is commonly considered to be a result of maladaptive brain plasticity. This model proposes that PLP is mainly caused by reorganisation in the primary somatosensory cortex, presumably characterised by functional degradation of the missing hand representation and remapping of other body part representations. In the current study, we replicate our previous results by showing that chronic PLP correlates with maintained representation of the missing hand in the primary sensorimotor missing hand cortex. We asked unilateral upper-limb amputees to move their phantom hand, lips or other body parts and measured the associated neural responses using functional magnetic resonance imaging (fMRI). We confirm that amputees suffering from worse chronic PLP have stronger activity in the primary sensorimotor missing hand cortex while performing phantom hand movements. We find no evidence of lip representation remapping into the missing hand territory, as assessed by measuring activity in the primary sensorimotor missing hand cortex during lip movements. We further show that the correlation between chronic PLP and maintained representation of the missing hand cannot be explained by the experience of chronic non-painful phantom sensations or compensatory usage of the residual arm or an artificial arm (prosthesis). Together, our results reaffirm a likely relationship between persistent peripheral inputs pertaining to the missing hand representation and chronic PLP. Our findings emphasise a need to further study the role of peripheral inputs from the residual nerves to better understand the mechanisms underlying chronic PLP. |
| spellingShingle | Kikkert, S Johansen-Berg, H Tracey, I Makin, TR Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title | Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title_full | Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title_fullStr | Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title_full_unstemmed | Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title_short | Reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
| title_sort | reaffirming the link between chronic phantom limb pain and maintained missing hand representation |
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