Late preterm infants' motor development until term age

Manual exploratory behaviors in six-month-old infants at environmental and biological risk

BACKGROUND

Exploratory behaviors are essential and may improve different skill development. Different risk factors may negatively impact neuromotor development, such as biological risk and environmental risk.

OBJECTIVE

Assess and discriminate exploratory behaviors of infants at environmental or biological risk and infants at non-risk.

METHODS

Sixty-four six-month-old infants were divided into three independent groups: Group 1 (G1), 28 healthy full-term infants; Group 2 (G2), 21 full-term infants of low socioeconomic status (SES); Group 3 (G3), 15 very preterm infants. Nine exploratory behaviors were assessed: fingering, mouthing, waving, tapping, banging, transferring, rotating, alternating, and squeezing.

RESULTS

For the malleable object, fingering (p = 0.005) and transferring (p = 0.046) behaviors were different between G2 and G3 whereas waving behavior (p = 0.041) differed between G1 and G3 and transferring (p = 0.003) between G1 and G2. For the rigid object, waving was different between G1 and G3 (p = 0.018) whereas transferring behavior differed between G2 and G3 (p = 0.019). Total number of behaviors was significantly different between G1 and G2 for malleable (p = 0.019) and rigid objects (p = 0.009). Intragroup analysis revealed differences between malleable and rigid objects for transferring (p = 0.013), squeezing (p < 0.0001), fingering (p < 0.0001), and banging (p = 0.013) behaviors in infants from G1. Fingering and squeezing (p < 0.0001) were different between malleable and rigid objects in G2 (p = 0.009 and p < 0.0001) and G3 (p = 0.004 and p < 0.0001).

CONCLUSION

Risk factors and object properties influence exploratory behaviors, mainly in low SES infants. Fingering and banging behaviors are favored by rigid objects, while squeezing is favored by malleable objects.

Functional movement assessment with the Test of Infant Motor Performance

The purpose of this article is to review research on the Test of Infant Motor Performance, a functional assessment of movement capabilities with age standards for infants from 34 weeks postmenstrual age through 17 weeks post term (corrected age). The Test of Infant Motor Performance was normed on a U.S. population-based sample to support its use as a tool for diagnosing delayed motor development in early infancy. The test is one of the preferred methods for parents of babies in special care nurseries to learn about their infant's development. The test was used in a variety of clinical trials to document effects of early therapy and can be used as a short-term outcome measure for other interventions expected to impact functional motor performance.

Motor Development among Spanish Preschool Children

The purpose of this study was to analyze motor development of Spanish preschoolers, taking into account sex and age, being an only child, prematurity, and the practice of extracurricular activities. The sample was composed of 300 preschoolers (132 girls, 168 boys) ages 3 to 6 years. Preschoolers were tested on 12 fundamental motor skills (locomotor and object control) through the Test of Gross Motor Development—Second Edition (TGMD-2). Nonparametric analysis indicated that there are differences between girls and boys in locomotor and object control skills in the age range of 3–4 years. However, boys and girls scored similarly at the age of 5 years in locomotor development. There were not differences between only children and those who are not only children. Similarly, prematurity was not associated with locomotor and object control development. Nevertheless, those preschoolers who practice extracurricular physical activities scored significantly higher in comparison with those children do not. Further research is needed to shed light on the differences between boys and girls in object control. It may be explained by the types of extracurricular activities.

Outcome of late preterm newborns in Upper Egypt

Background

The incidence of preterm births is increasing and has become a global health concern. This study aimed to compare the outcome of late preterm (LPT) to full term (FT) neonates at two large hospitals in Upper Egypt.

Results

Out of 250 newborns included in the study, 180 (72%) were FT and 70 (28%) were LPT. More than half of the LPT newborns (52.9%) were admitted to the neonatal intensive care unit (NICU), compared with 26.7% of FT newborns. Delivery of LPT was associated with an increased risk of neonatal morbidity, including jaundice requiring phototherapy (34.3% vs. 7.8%), respiratory morbidities (32.9% vs. 13.9%), hypoglycemia (8.6% vs. 1.7 %), and convulsions (4.3% vs. 0.6%).

Conclusions

LPT neonates were more susceptible to suffer from jaundice and respiratory distress among other morbidities. They also had a higher rate of NICU admission, longer duration of NICU stay, as well as a higher mortality rate. The best treatment of late prematurity is to prevent it. Public and professional awareness of the problems associated with late prematurity should be highlighted. Follow-up programs for early detection and intervention for long term complications are recommended.

Validation and Reliability of the Test of Infant Motor Performance for Brazilian Infants

Aim: To investigate the validity and reliability of the Portuguese version of the Test of Infant Motor Performance (TIMP) for Brazilian infants.Methods: The study was conducted with 20 health professionals and 655 Brazilian infants (between 34 weeks of Post-Menstrual Age and 17 weeks Corrected Age).Results: (1) Content validity: High concordance among the experts, for language clarity and pertinence, were found (ICC from.74 to .100; AC1 from .87 to 1.00); (2) Inter-rater, intra-rater, and test-retest reliability: Strong inter (α from .65 to .99) and intra (α from .97 to .99) raters agreement, and high test-retest reliability (r = 1.00; ICC = 1.00); (3) Internal consistency: Excellent internal consistency (α from .71 to .98); (4) Discriminant validity: Significant power to identify groups at-risk for delays (p < .0001); (5) Predictive validity: Capability to predict motor delay (r .55 to .89) was found; and, (6) Concurrent validity: Significant (p < .05) and low correlations at the first months (τ .21 to .24) and weak to moderate correlations at 3 and 4 month-old (τ .42 and .44, respectively) were observed between the TIMP and Alberta Infant Motor Scale.Conclusions: The results provide evidence of validity and reliability of the Portuguese version of the TIMP for Brazilian infants.

Urinary Levels of IL-1β and GDNF in Preterm Neonates as Potential Biomarkers of Motor Development: A Prospective Study

Objectives. To evaluate the association between inflammatory biomarkers, neurotrophic factors, birth conditions, and the presence of motor development abnormalities in preterm neonates. Methods. Plasma and urinary levels of cytokines (IL-1β, IL-6, IL-10, TNF, and IL-12p70), chemokines (CXCL8/IL-8, CCL2/MCP-1, CCL5/RANTES, CXCL10/IP-10, and CXCL9/MIG), and neurotrophic factors (BDNF and GDNF) were evaluated in 40 preterm neonates born between 28 and 32 incomplete weeks of gestation, at four distinct time points: at birth (umbilical cord blood) (T0), at 48 (T1), at 72 hours (T2), and at 3 weeks after birth (T3). Biomarkers levels were compared between different time points and then associated with Test of Infant Motor Performance (TIMP) percentiles. Results. Maternal age, plasma, and urinary concentrations of inflammatory molecules and neurotrophic factors were significantly different between groups with normal versus lower than expected motor development. Higher levels of GDNF were found in the group with lower than expected motor development, while IL-1β and CXCL8/IL-8 values were higher in the group with typical motor development. Conclusion. Measurements of cytokines and neurotrophic factors in spot urine may be useful in the follow-up of motor development in preterm neonates.