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The CAM test: a novel tool to quantify the decline in vertical upper limb pointing movements with ageing

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Abstract

Background and aim

Although upper limb movements in the vertical plane are very commonly used during the activities of daily life, there is still a lack of a reliable and easy standardized procedure to quantify them. In particular, ageing is associated with a decline in performances of coordinated movements, but a tool to quantify this decline is missing.

Methods

We created a novel portable test called counting arm movement test (CAM test). Participants were asked to perform fast and accurate successive pointing movements towards two fixed targets (mechanical counters) located in a vertical plane in the parasagittal axis during three different time periods (15, 30, 45 s). Each upper limb was assessed separately. The test was evaluated in a group of 63 healthy subjects (mean age ± SD 49.1 ± 19.8 years; F/M 33/30; range 18–87 years).

Results

Motor performances (number of clicks) significantly decreased as a function of age for both the dominant side (age effect; linear regression; p < 0.0001 for 15, 30 and 45 s) and the non-dominant side (linear regression; p < 0.0001 for 15, 30 and 45 s). Performances on the dominant and non-dominant side were linearly correlated with the time periods (p < 0.0001 on both sides). The symmetry index (ratio of performance on the dominant side divided by performance on the non-dominant side) was correlated linearly and positively with the duration of the test (y = 0.002x + 1.053; p = 0.0056). We also found a linear relationship between upper limb length and motor performance on the non-dominant side for 15 s (p = 0.023) and 45 s (p = 0.041). The test was characterized by a very high correlation between the results obtained by two investigators during two successive sessions in a subgroup of 7 subjects (Pearson product moment correlation: 0.989 for the dominant side and 0.988 for the non-dominant side).

Conclusion

The CAM test appears as a robust and low cost tool to quantify upper limb pointing movements. In particular, the test strongly discriminates the effects of age upon motor performances in upper limbs. Future studies are now required to establish the sensitivity, specificity and reliability of this procedure in selected neuromuscular or skeletal diseases affecting the elderly.

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Acknowledgments

MM is supported by the FNRS-Belgium.

Author information

Authors and Affiliations

  1. Unité d’Etude du Mouvement, Fonds de la Recherche Scientifique, ULB-Erasme, 808 Route de Lennik, 1070, Brussels, Belgium

    Caroline Ansay, Mario Manto, Stéphane Camut & Florian Bodranghien

  2. HELB Ilya Prigogine, Campus Erasme, Route de Lennik, Brussels, Belgium

    Caroline Ansay & Mario Manto

  3. HELB Ilya Prigogine, Collège d’ergothérapie de Bruxelles(CEbxl), Campus Erasme, Route de Lennik, Brussels, Belgium

    Stéphane Camut

  4. Clinical and Experimental Neurolinguistics, Vrije Universiteit Brussel, Brussels, Belgium

    Kim van Dun & Peter Mariën

  5. ZNA Middelheim General Hospital, Lindendreef 1, Antwerp, Belgium

    Peter Mariën

  6. CHNO, Hôpital des Quinze Vingts, Rue de Charenton, Paris, France

    Christophe Habas

Authors
  1. Caroline Ansay
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  2. Mario Manto
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  3. Stéphane Camut
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  4. Kim van Dun
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  5. Peter Mariën
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  6. Christophe Habas
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  7. Florian Bodranghien
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Corresponding author

Correspondence to Mario Manto.

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Conflict of interests

The authors have no conflict of interest (financial or non-financial) to declare.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

Before starting the measurements, each subject was provided with an oral explanation of the full procedure and signed an informed consent, following approval of the study by the ethical committee ULB-Erasme.

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Ansay, C., Manto, M., Camut, S. et al. The CAM test: a novel tool to quantify the decline in vertical upper limb pointing movements with ageing. Aging Clin Exp Res 28, 221–230 (2016). https://doi.org/10.1007/s40520-015-0407-3

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  • DOI: https://doi.org/10.1007/s40520-015-0407-3

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