Activity patterns assessed throughout 24-hour recordings in preterm and near term infants

Giganti, Fiorenza; Cioni, Giovanni; Biagioni, Enrico; Puliti, Maria Teresa; Boldrini, Antonio; Salzarulo, Piero

doi:10.1002/1098-2302(200103)38:2<133::aid-dev1006>3.0.co;2-i

Cited by 18 publications

(3 citation statements)

References 35 publications

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“…Neonates spend the majority of their time in quiescent states (Giganti et al, 2001), and the opportunities to capture a sustained 200-second segment of spontaneous generalized movements are relatively limited. Measurement was carried out every fourth week after birth between the ages of 0 and 6 months old.…”

Section: Methodsmentioning

confidence: 99%

A Dynamical System Analysis of the Development of Spontaneous Lower Extremity Movements in Newborn and Young Infants

Gima

Ohgi

Morita

et al. 2011

J Physiol Anthropol

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This study's aim was to evaluate the characteristics of newborn and young infants' spontaneous lower extremity movements by using dynamical systems analysis. Participants were 8 healthy full-term newborn infants (3 boys, 5 girls, mean birth weight and gestational age were 3070.6 g and 39 weeks). A tri-axial accelerometer measured limb movement acceleration in 3-dimensional space. Movement acceleration signals were recorded during 200 s from just below the ankle when the infant was in an active alert state and lying supine (sampling rate 200 Hz). Data were analyzed linearly and nonlinearly. As a result, the optimal embedding dimension showed more than 5 at all times. Time dependent changes started at 6 or 7, and over the next four months decreased to 5 and from 6 months old, increased. The maximal Lyapnov exponent was positive for all segments. The mutual information is at its greatest range at 0 months. Between 3 and 4 months the range in results is narrowest and lowest in value. The mean coefficient of correlation for the x-axis component was negative and y-axis component changed to a positive value between 1 month old and 4 months old. Nonlinear time series analysis suggested that newborn and young infants' spontaneous lower extremity movements are characterized by a nonlinear chaotic dynamics with 5 to 7 embedding dimensions. Developmental changes of an optimal embedding dimension showed a U-shaped phenomenon. In addition, the maximal Lyapnov exponents were positive for all segments (0.79-2.99). Infants' spontaneous movement involves chaotic dynamic systems that are capable of generating voluntary skill movements.

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Section: Methodsmentioning

confidence: 99%

A Dynamical System Analysis of the Development of Spontaneous Lower Extremity Movements in Newborn and Young Infants

Gima

Ohgi

Morita

et al. 2011

J Physiol Anthropol

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“…While this evaluation may seem counterintuitive to the ubiquitous computing community who might treat the sensors as being ground truth, the medical community established human video coding before sensing was available at this scale. Thus, using established, published, and validated procedures, a nurse manually scored the videos for periods of infant activity using the 4-point Giganti scale [28]. Annotations were made at 110 time points throughout the hour of data.…”

Section: Automated Involuntary Gesture Recognitionmentioning

confidence: 99%

Supporting the transition from hospital to home for premature infants using integrated mobile computing and sensor support

Hayes

Patterson

Singh

et al. 2011

Pers Ubiquit Comput

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“…Several studies report that stress behaviours manifest during exposure to stressors include finger splaying, brow raising, yawn, tremor and extension that are followed by a decline in oxygen saturation and an increase in high heart rate (Grunau et al, 2000; Harrison et al, 2004), a flexed body, extended legs and frown on painful stimulations (Holsti et al, 2005). Observation of sleep–wake states provides additional information regarding central nervous system maturation and organization (Scher et al, 2003) as well as developmental patterns (Holditch-Davis et al, 2003; Giganti et al, 2001; Weisman et al, 2011). It is logical to assume that while minimizing stress, and in turn, the abnormal responses to stressful stimuli will reduce the energy expenditure and improve neurological integration, growth and development of preterm infants.…”

Section: Introductionmentioning

confidence: 99%

The effect of positioning on preterm infants’ sleep–wake states and stress behaviours during exposure to environmental stressors

Peng

Chen

et al. 2013

J Child Health Care

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Previous studies separately examined the effects of positioning or environmental stressors on preterm infants' sleep and stress. Since positioning and environmental stressors occur simultaneously during infant hospitalization exploring these variables in the same study may offer new insights. A quasi-experimental study by one-group interrupted time-series design. In the current study, a total of 22 preterm infants were enrolled. Each infant was moved to either the supine or prone position for an hour at a time. Infants were videotaped and the sleep-wake states, stress behaviours and environmental conditions (light, noise and stimulation/handling) were recorded during the observation period. A total of 80 observations from 22 infants were accrued. In the supine position, preterm infants demonstrated more frequent waking states after adjusting for various environmental stressors (p < .01). These infants demonstrated more frequent stress behaviours in the supine position after adjusting for various environmental stressors (p < .01). These results suggest that the prone position is a more favourable position for facilitating sleep and reducing stress for preterm infants exposed to varying environmental stressors. Preterm infants present different stress behaviours in response to varying types of environmental stimuli.

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Activity patterns assessed throughout 24-hour recordings in preterm and near term infants

Cited by 18 publications

References 35 publications

A Dynamical System Analysis of the Development of Spontaneous Lower Extremity Movements in Newborn and Young Infants

A Dynamical System Analysis of the Development of Spontaneous Lower Extremity Movements in Newborn and Young Infants

Supporting the transition from hospital to home for premature infants using integrated mobile computing and sensor support

The effect of positioning on preterm infants’ sleep–wake states and stress behaviours during exposure to environmental stressors

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