Spontaneous leg movements in infants with and without periventricular leukomalacia: effects of unilateral weighting

Vaal, Juliette; Soest, A. J. “Knoek” van; Hopkins, Brian; Sie, L.T.L.

doi:10.1016/s0166-4328(01)00331-x

Cited by 15 publications

(13 citation statements)

References 27 publications

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“…It has been suggested that the corticospinal tracts mediate adaptive changes in limb movement frequencies induced by the limb weighting procedure (Vaal et al, 2000; Vaal, van Soest, Hopkins, & Sie, 2002). However, this is unlikely to be the case in the present study, since the corticospinal tracts innervate the first two cervical segments of the spinal cord at P2 in rats (Schreyer & Jones, 1988).…”

Section: Discussionmentioning

confidence: 99%

“…Together with studies involving at-risk human infant populations (Ulrich et al, 1997; Vaal et al, 2002), non-human animal studies (in which longer and more invasive experiments can be conducted) can begin to explore the neural mechanisms for and the role of proprioceptive feedback in regulating spontaneous motor activity during early motor development. Understanding the role of sensory feedback in the ontogeny of motor behavior and the nervous system may be important for developing activity-based rehabilitation treatments (Ulrich, 2010) for infants that exhibit developmental disabilities that affect the motor system (e.g., cerebral palsy, spina bifida, and Down’s syndrome).…”

Section: Discussionmentioning

confidence: 99%

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Sensory feedback alters spontaneous limb movements in newborn rats: Effects of unilateral forelimb weighting

Brumley

Robinson

2012

Developmental Psychobiology

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Perinatal mammals show spontaneous movements that often appear random and uncoordinated. Here, we examined if spontaneous limb movements are responsive to a proprioceptive manipulation by applying a weight unilaterally to a forelimb of postnatal day 0 (P0; day of birth) and P1 rats. Weights were calibrated to approximate 0%, 25%, 50%, or 100% of the average mass of a forelimb, and were attached at the wrist. P0 and P1 pups showed different levels of activity during the period of limb weighting, in response to weight removal, and during the period after weighting. Pups exposed to 50% and 100% weights showed proportionately more activity in the nonweighted forelimb during the period of weighting, suggesting a threshold for evoking proprioceptive changes. Findings suggest that newborn rats use movement‐related feedback to modulate spontaneous motor activity, and corroborate studies of human infants that have suggested a role for proprioception during early motor development. © 2012 Wiley Periodicals, Inc. Dev Psychobiol 55: 323–333, 2013

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Sensory feedback alters spontaneous limb movements in newborn rats: Effects of unilateral forelimb weighting

Brumley

Robinson

2012

Developmental Psychobiology

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“…Some authors found the influence of mobile kicks in spontaneous, showing that infants at the age of four months old learned to play a foot panel to activate the crib mobile 10 . Other authors investigated the effect of unilateral weight in infants in the ages of 6, 12, 18 and 26 weeks, which resulted in changes in the kick behavior, in the ages of 6 and 12 weeks, in the kicks frequency range of motion and in the peak speed of both legs 13 ; and investigated the contribution of dorsal root cortic tract in the regulation and coordination betwen limbs and spatio-temporal organization of the infants kicks with and without the addition of periventricular leucomalacia unilateral weight, they find some differences, which could not be assigned to the dorsal root cortic influences 14 . For this objective, analysis systems as OPTOTRAK 3020 motion analysis system sensors (Northern Digital Inc., Waterloo, Ont., Canada) and VIDIPLUS (Vrije Universiteit, Amsterdam, the Netherlands) have been used in the study of infants kicks.…”

Section: Introductionmentioning

confidence: 99%

Método para análise cinemática dos chutes de lactentes

2013

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| The aims of this study were to describe the method used for the kinematic analysis of kicking movements in infants and test its feasibility of use, using the Dvideow system. To adjust the method, four infants were longitudinally videotaped at ages from one to six months in the supine position. The experiment lasted two minutes, divided into two conditions: training and observation. The Dvideow system 6.3 for image analysis was used. It was verified that the use of four video cameras was more appropriate for the visibility of two markers simultaneously, allowing 3D reconstruction of motion. Moreover, 6 plumb lines were used to calibrate the system and ensure an accuracy of 2 mm. It was concluded that the use of the Dvideow system to perform kinematic analysis of the kicking movement in infants proved to be appropriate and feasible, since this system is accessible, of low cost and easy to be used for researchers in general.Keywords | infant; lower extremity; child development; biomechanics.RESUMO | Os objetivos deste estudo foram descrever o mé-todo utilizado para a análise cinemática dos movimentos de chutes em lactentes e testar sua viabilidade de uso, empregando o sistema Dvideow. Para adequação do método, quatro lactentes foram filmados, longitudinalmente, nas idades de um a seis meses na posição supina. O experimento teve a duração de dois minutos, subdivididos em duas condições: treinamento e observação. O sistema Dvideow 6.3 foi utilizado para análise das imagens. Foi verificado que o uso de quatro câmeras de vídeo é mais apropriado para garantir a visibilidade de dois marcadores, simultaneamente, permitindo a reconstrução tridimensional do movimento. Além disso, utilizamos 6 fios de prumo para calibrar o sistema e garantir uma precisão de 2 mm. Portanto, concluímos que a utilização do sistema Dvideow para realizar a análise cinemática dos chutes de lactentes mostrou-se adequada e viável, uma vez que esse sistema é acessível, de baixo custo e de fácil utilização para os pesquisadores em geral.Descritores | lactente; extremidade inferior; desenvolvimento infantil; biomecânica.RESUMEN | Los objetivos de este estudio fueron describir el método utilizado para el análisis cinemático de los movimientos de pataleo en lactantes y probar su factibilidad de uso, empleando el sistema Dvideow. Para la adecuación del método, cuatro lactantes fueron filmados, longitudinalmente, en las edades de uno a seis meses en la posición supina. El experimento tiene una duración de dos minutos, subdivididos en dos condiciones: entrenamiento y observación. El sistema Dvideow 6.3 fue utilizado para el análisis de las imágenes. Fue verificado que el uso de cuatro cámaras de video es más apropiado para garantizar la visibilidad de dos marcadores simultáneos, permitiendo la reconstrucción tridimensional del movimiento. Además, utilizamos seis alambres de plomo para calibrar el sistema y garantizar una precisión de 2 mm. Por lo tanto, concluimos que la utilización del sistema Dvideow para realizar el análisis cinemático de los ...

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“…Additional weight has been used in different motor skills such as kicking (Chen, Fetters, Holt, & Saltzman, 2002;Thelen et al, 1987;Vaal, Van Soest, Hopkins, & Sie, 2002), gait (Adolph & Avolio, 2000), fidgety movements (Dibiasi & Einspieler, 2004), and reaching (Out et al, 1997;Rocha et al, 2009;Van der Fits & Hadders-Algra, 1998). Despite the growing interest in the effects of weight on different motor skills of healthy infants, there is still no consensus in literature about its real effects.…”

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confidence: 99%

“…These results were in part attributed to the increased proprioception and neural activation caused by weight. However, there is evidence that fidgety movements (Dibiasi & Einspieler), the amplitude of the knee and hip angle and the peak velocity during kicking movements (Vaal, Van Soest, Hopkins, & Sie, 2002), and the mean velocity of the upper limb during reaching movements (Van Der Fits & HaddersAlgra, 1998) are not changed by the use of additional weight on limbs. Such differences among results are probably due to different objectives, methodologies, amount of weight, and variables used in each study.…”

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confidence: 99%

Additional Weight Influences the Reaching Behavior of Low-Risk Preterm Infants

Toledo

Soares

Tudella

2012

Journal of Motor Behavior

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The authors investigated the influence of additional weight in the reaching behavior of preterm infants. Nine low-risk preterm and 10 full-term infants age 5-7 months participated. A toy was presented in two procedures: (a) baseline and (b) additional weight (bracelet with weight of 20% of the infant's upper limb mass). The additional weight reduced the straightness index at 5 months, increased the mean velocity and decreased the movement units at all months, and increased unsuccessful grasps at 5 and 7 months in preterm infants. Preterm infants showed less movement units at all months and less unsuccessful grasps at 6 months compared with full-term infants. Weight disturbance seems to change the intrinsic dynamics involved in reaching movements of 5-7-month-old preterm infants.

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Spontaneous leg movements in infants with and without periventricular leukomalacia: effects of unilateral weighting

Cited by 15 publications

References 27 publications

Sensory feedback alters spontaneous limb movements in newborn rats: Effects of unilateral forelimb weighting

Sensory feedback alters spontaneous limb movements in newborn rats: Effects of unilateral forelimb weighting

Método para análise cinemática dos chutes de lactentes

Additional Weight Influences the Reaching Behavior of Low-Risk Preterm Infants

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