Enhanced left-finger deftness following dominant upper- and lower-limb amputation
(2011) In Neurorehabilitation and Neural Repair 25(7). p.4-680- Abstract
BACKGROUND: After amputation, the sensorimotor cortex reorganizes, and these alterations might influence motor functions of the remaining extremities.
OBJECTIVE: The authors examined how amputation of the dominant or nondominant upper or lower extremity alters deftness in the intact limbs.
METHODS: The participants were 32 unilateral upper- or lower-extremity amputees and 6 controls. Upper-extremity deftness was tested by coin rotation (finger deftness) and pegboard (arm, hand, and finger deftness) tasks.
RESULTS: Following right-upper- or right-lower-extremity amputation, the left hand's finger movements were defter than the left-hand fingers of controls. In contrast, with left-upper- or left-lower-extremity... (More)
BACKGROUND: After amputation, the sensorimotor cortex reorganizes, and these alterations might influence motor functions of the remaining extremities.
OBJECTIVE: The authors examined how amputation of the dominant or nondominant upper or lower extremity alters deftness in the intact limbs.
METHODS: The participants were 32 unilateral upper- or lower-extremity amputees and 6 controls. Upper-extremity deftness was tested by coin rotation (finger deftness) and pegboard (arm, hand, and finger deftness) tasks.
RESULTS: Following right-upper- or right-lower-extremity amputation, the left hand's finger movements were defter than the left-hand fingers of controls. In contrast, with left-upper- or left-lower-extremity amputation, the right hand's finger performance was the same as that of the controls.
CONCLUSIONS: Although this improvement might be related to increased use (practice), the finding that right-lower-extremity amputation also improved the left hand's finger deftness suggests an alternative mechanism. Perhaps in right-handed persons the left motor cortex inhibits the right side of the body more than the right motor cortex inhibits the left side, and the physiological changes induced by right-sided amputation reduced this inhibition.
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- author
- Swanberg, Kelley M LU ; Clark, Abigail M ; Kline, Julia E ; Yurkiewicz, Ilana R ; Chan, Brenda L ; Pasquina, Paul F ; Heilman, Kenneth M and Tsao, Jack W
- publishing date
- 2011-09
- type
- Contribution to journal
- publication status
- published
- keywords
- Adult, Amputation, Surgical, Analysis of Variance, Fingers/physiology, Functional Laterality/physiology, Hand/physiology, Humans, Lower Extremity/physiology, Male, Motor Skills/physiology, Somatosensory Cortex/physiology, Upper Extremity/physiology
- in
- Neurorehabilitation and Neural Repair
- volume
- 25
- issue
- 7
- pages
- 4 - 680
- publisher
- SAGE Publications
- external identifiers
-
- pmid:21478497
- scopus:80051520892
- ISSN
- 1552-6844
- DOI
- 10.1177/1545968311404242
- language
- English
- LU publication?
- no
- id
- 4ee1fa11-e0b2-45d7-a21f-5ec517c339e6
- date added to LUP
- 2023-09-18 15:04:26
- date last changed
- 2024-01-04 04:44:40
@article{4ee1fa11-e0b2-45d7-a21f-5ec517c339e6, abstract = {{<p>BACKGROUND: After amputation, the sensorimotor cortex reorganizes, and these alterations might influence motor functions of the remaining extremities.</p><p>OBJECTIVE: The authors examined how amputation of the dominant or nondominant upper or lower extremity alters deftness in the intact limbs.</p><p>METHODS: The participants were 32 unilateral upper- or lower-extremity amputees and 6 controls. Upper-extremity deftness was tested by coin rotation (finger deftness) and pegboard (arm, hand, and finger deftness) tasks.</p><p>RESULTS: Following right-upper- or right-lower-extremity amputation, the left hand's finger movements were defter than the left-hand fingers of controls. In contrast, with left-upper- or left-lower-extremity amputation, the right hand's finger performance was the same as that of the controls.</p><p>CONCLUSIONS: Although this improvement might be related to increased use (practice), the finding that right-lower-extremity amputation also improved the left hand's finger deftness suggests an alternative mechanism. Perhaps in right-handed persons the left motor cortex inhibits the right side of the body more than the right motor cortex inhibits the left side, and the physiological changes induced by right-sided amputation reduced this inhibition.</p>}}, author = {{Swanberg, Kelley M and Clark, Abigail M and Kline, Julia E and Yurkiewicz, Ilana R and Chan, Brenda L and Pasquina, Paul F and Heilman, Kenneth M and Tsao, Jack W}}, issn = {{1552-6844}}, keywords = {{Adult; Amputation, Surgical; Analysis of Variance; Fingers/physiology; Functional Laterality/physiology; Hand/physiology; Humans; Lower Extremity/physiology; Male; Motor Skills/physiology; Somatosensory Cortex/physiology; Upper Extremity/physiology}}, language = {{eng}}, number = {{7}}, pages = {{4--680}}, publisher = {{SAGE Publications}}, series = {{Neurorehabilitation and Neural Repair}}, title = {{Enhanced left-finger deftness following dominant upper- and lower-limb amputation}}, url = {{http://dx.doi.org/10.1177/1545968311404242}}, doi = {{10.1177/1545968311404242}}, volume = {{25}}, year = {{2011}}, }