Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy
Objective: To quantify selective voluntary motor control (SVMC) objectively and more precisely, we combined the “Selective Control Assessment of the Lower Extremity” (SCALE) with surface electromyography. The resulting Similarity Index (SI) measures the similarity of muscle activation patterns. This...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-01-01
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| Series: | Clinical Neurophysiology Practice |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2467981X22000130 |
| _version_ | 1811177667989340160 |
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| author | Julia Balzer Annina Fahr Jeffrey W. Keller Marietta L. van der Linden Thomas H. Mercer Hubertus J.A. van Hedel |
| author_facet | Julia Balzer Annina Fahr Jeffrey W. Keller Marietta L. van der Linden Thomas H. Mercer Hubertus J.A. van Hedel |
| author_sort | Julia Balzer |
| collection | DOAJ |
| description | Objective: To quantify selective voluntary motor control (SVMC) objectively and more precisely, we combined the “Selective Control Assessment of the Lower Extremity” (SCALE) with surface electromyography. The resulting Similarity Index (SI) measures the similarity of muscle activation patterns. This study evaluated the preliminary validity and reliability of this novel SISCALE measure in children with cerebral palsy (CP). Methods: We investigated concurrent validity by correlating the SISCALE of 24 children with CP (median age 10.6 years) with comparator assessments. For discriminative validity, the patients’ SISCALE scores were compared to 31 neurologically intact age-matched peers. Test-retest reliability was quantified using intraclass correlation coefficients (ICC) and minimal detectable change (MDC) values. Results: The SISCALE correlated strongly with the SCALE (ρ = 0.90, p < .001) and the Gross Motor Function Classification System (ρ = −0.74, p < .001). SISCALE scores were significantly lower in children with CP compared to healthy peers. Test-retest reliability appeared good (for the more and less affected leg, ICC ≥ 0.84, and MDC ≤ 0.17). Conclusions: Validity and reliability of the SISCALE leg and total scores lay within clinically acceptable ranges. Further clinimetric analyses should include responsiveness. Significance: A neurophysiology-based assessment could contribute to a more refined assessment of SVMC impairments. |
| first_indexed | 2024-04-11T06:04:58Z |
| format | Article |
| id | doaj.art-284d70145cb74d21b7586764cf4ba8c1 |
| institution | Directory Open Access Journal |
| issn | 2467-981X |
| language | English |
| last_indexed | 2024-04-11T06:04:58Z |
| publishDate | 2022-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Clinical Neurophysiology Practice |
| spelling | doaj.art-284d70145cb74d21b7586764cf4ba8c12022-12-22T04:41:31ZengElsevierClinical Neurophysiology Practice2467-981X2022-01-017107114Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsyJulia Balzer0Annina Fahr1Jeffrey W. Keller2Marietta L. van der Linden3Thomas H. Mercer4Hubertus J.A. van Hedel5Swiss Children’s Rehab, University Children's Hospital Zurich, Zurich, Switzerland; Centre for Health, Activity and Rehabilitation Research, Queen Margaret University, Edinburgh, United Kingdom; Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, Zurich, SwitzerlandSwiss Children’s Rehab, University Children's Hospital Zurich, Zurich, Switzerland; Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, Zurich, Switzerland; Corresponding author at: Swiss Children’s Rehab, Mühlebergstrasse 104, 8910 Affoltern am Albis, Switzerland.Swiss Children’s Rehab, University Children's Hospital Zurich, Zurich, Switzerland; Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, Zurich, SwitzerlandCentre for Health, Activity and Rehabilitation Research, Queen Margaret University, Edinburgh, United KingdomCentre for Health, Activity and Rehabilitation Research, Queen Margaret University, Edinburgh, United KingdomSwiss Children’s Rehab, University Children's Hospital Zurich, Zurich, Switzerland; Children’s Research Center, University Children’s Hospital Zurich, University of Zurich, Zurich, SwitzerlandObjective: To quantify selective voluntary motor control (SVMC) objectively and more precisely, we combined the “Selective Control Assessment of the Lower Extremity” (SCALE) with surface electromyography. The resulting Similarity Index (SI) measures the similarity of muscle activation patterns. This study evaluated the preliminary validity and reliability of this novel SISCALE measure in children with cerebral palsy (CP). Methods: We investigated concurrent validity by correlating the SISCALE of 24 children with CP (median age 10.6 years) with comparator assessments. For discriminative validity, the patients’ SISCALE scores were compared to 31 neurologically intact age-matched peers. Test-retest reliability was quantified using intraclass correlation coefficients (ICC) and minimal detectable change (MDC) values. Results: The SISCALE correlated strongly with the SCALE (ρ = 0.90, p < .001) and the Gross Motor Function Classification System (ρ = −0.74, p < .001). SISCALE scores were significantly lower in children with CP compared to healthy peers. Test-retest reliability appeared good (for the more and less affected leg, ICC ≥ 0.84, and MDC ≤ 0.17). Conclusions: Validity and reliability of the SISCALE leg and total scores lay within clinically acceptable ranges. Further clinimetric analyses should include responsiveness. Significance: A neurophysiology-based assessment could contribute to a more refined assessment of SVMC impairments.http://www.sciencedirect.com/science/article/pii/S2467981X22000130Motor controlCerebral palsyClinimetric propertiesSurface EMGOutcome measure |
| spellingShingle | Julia Balzer Annina Fahr Jeffrey W. Keller Marietta L. van der Linden Thomas H. Mercer Hubertus J.A. van Hedel Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy Clinical Neurophysiology Practice Motor control Cerebral palsy Clinimetric properties Surface EMG Outcome measure |
| title | Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| title_full | Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| title_fullStr | Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| title_full_unstemmed | Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| title_short | Validity and reliability of an electromyography-based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| title_sort | validity and reliability of an electromyography based similarity index to quantify lower extremity selective voluntary motor control in children with cerebral palsy |
| topic | Motor control Cerebral palsy Clinimetric properties Surface EMG Outcome measure |
| url | http://www.sciencedirect.com/science/article/pii/S2467981X22000130 |
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