Amplitude and frequency analysis of force plate data in sitting children with and without MMC

Karlsson, Annica; Norrlin, Simone; Silander, Hans C:son; Dahl, Margareta; Lanshammar, Håkan

doi:10.1016/s0268-0033(00)00010-3

Cited by 24 publications

(16 citation statements)

References 10 publications

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“…Our results indicate that persons with SCI present reduced median frequency in medial-lateral displacements compared with CG, as was also reported in a previous study of children with myelomeningocele. 18 Regarding frequency bands, there were significant differences between groups in the low and intermediate bands, mostly in the EC condition and medial-lateral displacements. The intermediate frequency band was lower in the SCI groups than in the CG, which could be due to the communication impairment between the cerebellum and spinal cord.…”

Section: Discussionmentioning

confidence: 94%

“…Nevertheless, this type of analysis is useful for evaluating postural disturbances caused by specific diseases or conditions as it has been seen in previous studies. [18][19][20] In the test performed with EC, the SCI subjects demonstrated a significant increase in the contribution of the low-frequency band. Thus, the suppression of visual information may increment the dependency of vestibular information.…”

Section: Discussionmentioning

confidence: 94%

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Sitting balance and limits of stability in persons with paraplegia

et al. 2012

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Study Design: Cross-sectional, observational study of paraplegic and able-bodied persons. Objectives: The aim of the study was to analyse the temporal and frequency domains of seated balance to better understand nervous system control in equilibrium in persons with spinal cord injury (SCI) and to explore their centre of pressure (CoP) limits before experiencing a fall. Setting: University of Valencia, Spain. Methods: Static and dynamic seated balance were assessed in 24 paraplegic persons divided into two groups: low paraplegia group (LP) and high paraplegia group (HP), and 24 healthy volunteers with an extensiometric force plate. Two types of tests were performed: a static test (ST), where data signal was analysed by temporal and frequency domains, and a stability limit test (SLT), where different stability limits were calculated. Results: The paraplegic group revealed lower static postural control in both domains in most of the parameters analysed compared with the control group (CG). Similar results were obtained with regard to the SLT, showing differences in the three parameters analysed between the CG and SCI groups. Conclusion: Posturographic assessment in ST was useful to explore nervous system control in equilibrium in this population, presenting a decreased balance in paraplegic groups and an altered pattern in the sensorial and cerebellum bands compared with able-bodied individuals. Furthermore, SLT indicated less movement control of the CoP in paraplegic groups, which may influence the performance of their daily activities.

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Section: Discussionmentioning

confidence: 94%

Section: Discussionmentioning

confidence: 94%

Sitting balance and limits of stability in persons with paraplegia

et al. 2012

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“…However, due to the children's difficulties in standing still, these studies were performed while seated. The results showed that frequency analysis of the postural sway could detect fundamental differences in six-and ten-year-old children with MMC compared to children with typical development [19,20].…”

Section: Introductionmentioning

confidence: 95%

Influence of dual tasks on sitting postural sway in children and adolescents with myelomeningocele

Höglund

Norrlin

2009

Gait & Posture

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“…Patients affected by a chronic tension-type headache exhibit increased COP frequencies compared with a group of healthy subjects (9). On the other hand, children with myelomeningocele show an opposite trend, characterized by reduced median frequency values (10).…”

Section: Introductionmentioning

confidence: 97%

“…Frequency domain analysis seems to be useful for evaluating postural disturbances caused by specific diseases or conditions (8)(9)(10)(11). Patients affected by a chronic tension-type headache exhibit increased COP frequencies compared with a group of healthy subjects (9).…”

Section: Introductionmentioning

confidence: 99%

Estimation procedures affect the center of pressure frequency analysis

Vieira

Oliveira

Nadal

2009

Braz J Med Biol Res

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Even though frequency analysis of body sway is widely applied in clinical studies, the lack of standardized procedures concerning power spectrum estimation may provide unreliable descriptors. Stabilometric tests were applied to 35 subjects (20-51 years, 54-95 kg, 1.6-1.9 m) and the power spectral density function was estimated for the anterior-posterior center of pressure time series. The median frequency was compared between power spectra estimated according to signal partitioning, sampling rate, test duration, and detrending methods. The median frequency reliability for different test durations was assessed using the intraclass correlation coefficient. When increasing number of segments, shortening test duration or applying linear detrending, the median frequency values increased significantly up to 137%. Even the shortest test duration provided reliable estimates as observed with the intraclass coefficient (0.74-0.89 confidence interval for a single 20-s test). Clinical assessment of balance may benefit from a standardized protocol for center of pressure spectral analysis that provides an adequate relationship between resolution and variance. An algorithm to estimate center of pressure power density spectrum is also proposed.

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Amplitude and frequency analysis of force plate data in sitting children with and without MMC

Cited by 24 publications

References 10 publications

Sitting balance and limits of stability in persons with paraplegia

Sitting balance and limits of stability in persons with paraplegia

Influence of dual tasks on sitting postural sway in children and adolescents with myelomeningocele

Estimation procedures affect the center of pressure frequency analysis

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