| 1. |
- Öberg, Ulrika, et al.
(författare)
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Functional outcome after high tibial osteotomy : A study using individual goal achievement as the primary outcome variable
- 2000
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Ingår i: Journal of rehabilitation research and development. - 0748-7711 .- 1938-1352. ; 37:5, s. 501-510
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Tidskriftsartikel (refereegranskat)abstract
- Functional outcome after high tibial osteotomy (HTO) was evaluated with respect to both improvement and goal achievement. Fifty-seven subjects, 32 men and 25 women, with a mean age of 55 years were examined with the Functional Assessment System (FAS) 6 and 12 months after surgery. The FAS is an evaluation system, specifically designed to monitor lower extremity dysfunction. It shows a profile with preoperative status, individual goal, and postoperative status. Statistically significant improvement was seen in 6/20 variables after 6 months, and in 10/20 variables after 12 months. When goal achievement was examined, the results were not as impressive. The treatment goal was not reached on the group level for almost all variables. On the individual level, only 20\N40% of the patients achieved the goal as a result of surgery in most variables. Exceptions were pain and leisure time/hobbies, where there was a high degree of goal achievement. It is possible that postoperative training was inadequate. The authors recommend a new randomized study, where patients who receive specific individual training related to the individual goal and functional profile are compared with a control group.
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| 2. |
- Öberg, Tommy, 1943-
(författare)
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Trapezius muscle fatigue and electromyographic frequency analysis
- 1992
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This study, comprising 6 separate articles, is concerned with different validity and reliability aspects of the electromyogram mean power frequency (MPF) as an estimator of localized musele fatigue in the trapezius muscle. A series of new, and partly controversial and problematic findings are reported.There was a systematic variation of MPF that was not related to muscle fatigue, but to other factors such as shoulder joint angle, torque and external hand load, which can erroneously be interpreted as muscle fatigue; the largest variation, ±8%, was related to joint angle; movements of the surface electrodes was the most probable explanation of this variation and thus significantly influence the MPF estimates; there was an unacceptably large random variation of single MPF estimates; single estimates should not be used for normalization of MPF; there was no correlation between MPF and subjective muscle fatigue at low load level; MPF did not work as a valid estimator of localized muscle fatigue at low load level; load dose was not a suitable parameter to represent physical stimulus at the evaluation of subjective fatigue; the EMG response to fatigue seemed to be different in healthy muscle compared with diseased muscle in patients with unilateral work-related trapezius myalgia; the changes were more pronounced on the healthy side.All these factors have to be considered if MPF is to be used as an estimator of localized muscle fatigue. Procedures are proposed to overcome some of these difficulties and reduce some of the variations such as a standard procedure for calibration, repeated measurements, regression procedures with calculation of trends insted of evaluation of single MPF estimate etc. There is a need for more research concerning the variation of MPF and procedures to handle this variation.
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