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Characterising phantom limb phenomena in upper limb amputees.
C M Fraser1, P W Halligan, I H Robertson
1Occupational Therapy Services, Addenbrooke's NHST, Cambridge, England, UK. cf13@cam.ac.uk
Prosthetics and Orthotics International
|February 28, 2002
Summary
Most upper limb amputees experience phantom limb phenomena (PLP), with many reporting painful sensations. Understanding these phantom experiences, including trigger points, may reveal insights into brain reorganization after amputation.
Area of Science:
- Neuroscience
- Rehabilitation Medicine
- Clinical Psychology
Background:
- Phantom limb phenomena (PLP) are common after amputation.
- Distinguishing PLP from stump and pre-amputation pain is crucial for understanding the amputee experience.
- The underlying mechanisms of PLP, potentially involving cortical reorganization, require further investigation.
Purpose of the Study:
- To systematically survey clinic patients with acquired upper limb amputations.
- To differentiate between phantom experiences, pre-amputation pain, and stump pain.
- To investigate the characteristics and potential correlates of phantom limb phenomena.
Main Methods:
- A systematic descriptive survey was conducted on 76 participants with acquired upper limb amputations.
- Participants were assessed for phantom experiences, pre-amputation pain, and stump pain.
- Data were analyzed to identify relationships between amputation characteristics and phantom phenomena.
Main Results:
- 96% of participants reported phantom experiences, and 84% currently experienced PLP.
- 69% of those with current PLP reported painful phantom sensations.
- Significant associations were found between the frequency of phantom experiences and amputation side/level.
- The presence of 'trigger' points correlated with the frequency and pain intensity of phantom experiences.
Conclusions:
- Phantom limb phenomena are highly prevalent in upper limb amputees, often accompanied by pain.
- Trigger points may be linked to cortical reorganization following amputation.
- Detailed profiling of individual phantom experiences is essential for advancing knowledge and clinical practice in amputation rehabilitation.