Test–retest reliability of spatial and temporal gait parameters in children with cerebral palsy as measured by an electronic walkway

Sorsdahl, Anne Brit; Moe‐Nilssen, Rolf; Strand, Liv Inger

doi:10.1016/j.gaitpost.2007.01.001

Cited by 57 publications

(49 citation statements)

References 22 publications

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“…Measurements of the proportion of between-subject variation in results obtained from two or more repetitions of a test are often referred to as test-retest reliability, and introduce the concept of stability of gait characteristics over time and space (Moe-Nilssen, 1998;Sorsdahl et al, 2008). In contrast to the classical definition of measurement reliability (which assesses the impact of measurement error or agreement between different observers), the test-retest reliability is influenced by both the precision of the measurements and the natural variability of the parameters measured.…”

Section: Gait Variabilitymentioning

confidence: 99%

Measurement of spatial gait parameters from footprints of dairy cows

Telezhenko

2009

Animal

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The variability in dairy cow gait characteristics, determined by measurements of footprints (trackway measurements), was analysed. Seven gait parameters were determined from 32 non-lame dairy cows during free-speed walking on a slatted concrete walkway. The footprints were revealed by application of a thin lime powder-slurry layer to the walkway surface. The cows were observed on two test occasions with a 3-week interval, with measurements from four consecutive strides used within each test session. The variance components for cow, test and cow-test interaction were estimated by a residual (restricted) maximum likelihood method. The percentage of each variance component was calculated to assess the relative impact of each factor on total variance. Between-test variation was generally low, suggesting that cows maintain the same average gait pattern, at least over a 3-week period. The proportion of within-test variation was considerable for most trackway measurements. Stride length, step angle, step width and tracking (overlap) showed low to moderate within-test variation (12% to 27%), whereas for mediolateral displacement of rear feet and step length it was rather high (54% and 62%, respectively). Within-test variation in step asymmetry was very high (77%), suggesting the occurrence of natural, non-systematic changes in inter-limb coordination in non-lame cows. For better understanding the gait pattern in non-lame cows, linear associations between the trackway measurements and with body size were assessed. It was concluded that trackway measurements were able to describe the gait pattern in walking cows under dairy farm conditions. However, considering the relatively high within-test variation in gait, several strides should be used to obtain a representative gait pattern.

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Section: Gait Variabilitymentioning

confidence: 99%

Measurement of spatial gait parameters from footprints of dairy cows

Telezhenko

2009

Animal

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“…These gait components are commonly used in the evaluation of humans for detection of neurological and motor conditions including AT. For instance the %CV was calculated because patients with cerebellar ataxia are usually inconsistent and lose their ability to stabilize their walk pattern (44)(45)(46)(47)(48).…”

Section: Clinical Phenotype Of the At Pigsmentioning

confidence: 99%

A novel porcine model of ataxia telangiectasia reproduces neurological features and motor deficits of human disease

et al. 2015

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Ataxia telangiectasia (AT) is a progressive multisystem disorder caused by mutations in the AT-mutated (ATM) gene. AT is a neurodegenerative disease primarily characterized by cerebellar degeneration in children leading to motor impairment. The disease progresses with other clinical manifestations including oculocutaneous telangiectasia, immune disorders, increased susceptibly to cancer and respiratory infections. Although genetic investigations and physiological models have established the linkage of ATM with AT onset, the mechanisms linking ATM to neurodegeneration remain undetermined, hindering therapeutic development. Several murine models of AT have been successfully generated showing some of the clinical manifestations of the disease, however they do not fully recapitulate the hallmark neurological phenotype, thus highlighting the need for a more suitable animal model. We engineered a novel porcine model of AT to better phenocopy the disease and bridge the gap between human and current animal models. The initial characterization of AT pigs revealed early cerebellar lesions including loss of Purkinje cells (PCs) and altered cytoarchitecture suggesting a developmental etiology for AT and could advocate for early therapies for AT patients. In addition, similar to patients, AT pigs show growth retardation and develop motor deficit phenotypes. By using the porcine system to model human AT, we established the first animal model showing PC loss and motor features of the human disease. The novel AT pig provides new opportunities to unmask functions and roles of ATM in AT disease and in physiological conditions. † These authors contributed equally.

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“…Paralizia cerebralã (PC) este cauzatã de leziuni non-progresive ale creierului care apar între perioada prenatalã ºi perioada de dupã naºtere ºi duce la o serie de spasme musculare, tulburãri de mers ºi deformãri ale picioarelor [1], cum ar fi mersul pe vârfuri, rigiditate în mers, genunchi flexaþi, mers în salturi, deformare de tip varus equin ºi rotirea membrelor inferioare [2]. Prin urmare, mecanismul de echilibru în miºcare al pacienþilor cu PC este întrerupt ºi trebuie evaluat în timpul procedurii de reabilitare a acestora.…”

Section: Introducereunclassified

“…Cerebral palsy (CP) is caused by a nonprogressive brain damage which occurs between pre-birth and the infant period after birth and it leads to a series of muscle spastic, abnormal gait and foot deformity [1], such as tip toeing, rigidity gait, flexed knee, leap gait, equines deformity and rotated lower limb deformity [2]. Therefore, the motion balance mechanism of CP patients is interrupted and it needs to be evaluated during their rehabilitation procedure.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Motion Balance of Children with Spastic Diplegia

Song¹,

Fan²,

Zhou³

et al. 2016

LFJ

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ABSTRACT. The aim of this study was to find the features of balance control of cerebral palsy (CP) children by exploring the variances between the CP and TD groups in terms of centre of pressure (COP) deviation, velocity and sum of distances. Eighteen spastic diplegia children (CP) and 36 typical developed counterparts (TD) who were matching with age, height and weight were recruited and measured by pressure plate and then COP parameters such as Relative deviation in the X (Dxrel) and Y axis (Dyrel), Relative velocity in the X (Vxrel) and Y axis (Vyrel) and Relative sum distance in X (Dxrel) and Y axis (Dyrel). Independent T test and reliability analysis were carried out with significance level of 0.05 and confidence interval of 95%. Our results show that Dxrel, Vxrel, Vyrel, SumXrel and SumYrel of CP were significantly higher than those of TD; meanwhile COP of CP was always located at the medial side of foot which indicated a severe valgus and distances in anteriorposterior (AP) direction of CP were smaller than that of TD. At last, a reasonable repeatability was obtained for CP, since their COV of Dxrel, Dyrel, Vxrel, Vyrel, SumXrel and SumYrel CoV were overall <13%, whereas, with exception of ICC of Vxrel and SumXrel, ICC of Dxrel, Dyrel and SumYrel were higher than 0.5. Overall, in order to fulfill the balance control, strategies of foot valgus, larger deviation in medial-lateral (ML) direction, longer contact time and higher velocity in AP and ML directions were adopted by CP children. KEY WORDS: spastic diplegia, balance control, centre of pressure, plantar pressure measurement ANALIZA ECHILIBRULUI ÎN MIªCARE LA COPIII CU DIPLEGIE SPASTICÃ REZUMAT. Scopul acestui studiu a fost de a gãsi caracteristicile de control al echilibrului la copiii cu paralizie cerebralã (PC) prin explorarea diferenþelor dintre grupele PC ºi TD din punctul de vedere al devierii, vitezei ºi sumei distanþelor centrului de presiune (COP). S-au recrutat optsprezece copii cu diplegie spasticã (PC) ºi 36 subiecþi cu dezvoltare normalã (TD), cu vârstã, înãlþime ºi greutate similare ºi s-au efectuat mãsurãtori utilizând platforma de presiune ºi apoi s-au determinat parametrii COP, cum ar fi abaterea relativã pe axele X (Dxrel) ºi Y (Dyrel), viteza relativã pe axele X (Vxrel) ºi Y (Vyrel) ºi suma distanþelor relative pe axele X (Dxrel) ºi Y (Dyrel). S-au efectuat testul t independent ºi analiza fiabilitãþii cu un nivel de semnificaþie de 0,05 ºi interval de încredere de 95%. Rezultatele noastre aratã cã parametrii Dxrel, Vxrel, Vyrel, SumXrel ºi SumYrel la subiecþii cu PC au fost semnificativ mai mari decât cei pentru grupa TD; pe de altã parte, COP pentru grupa PC s-a situat întotdeauna în partea medianã a piciorului, ceea ce a indicat o deformaþie severã în valgus, iar distanþele în direcþia antero-posterioarã (AP) la grupa PC au fost mai mici decât cele din grupa TD. În cele din urmã, s-a obþinut o repetabilitate rezonabilã pentru PC, întrucât CoV al parametrilor Dxrel, Dyrel, Vxrel, Vyrel, SumXrel ºi SumYrel a fost în general <13%, în t...

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Test–retest reliability of spatial and temporal gait parameters in children with cerebral palsy as measured by an electronic walkway

Cited by 57 publications

References 22 publications

Measurement of spatial gait parameters from footprints of dairy cows

Measurement of spatial gait parameters from footprints of dairy cows

A novel porcine model of ataxia telangiectasia reproduces neurological features and motor deficits of human disease

Investigation of Motion Balance of Children with Spastic Diplegia

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