Maturational and situational determinants of reaching at its onset.

At 3 months of age, reaching behavior was measured in a group of 10 girls and 10 boys born at term. The assessments were carried out on the average 2 days after reaching onset. Reaching kinematics was measured in both supine and reclined positions.

Differences between late preterm and full-term infants: comparing effects of a short bout of practice on early reaching behavior.

This study compared the effects of a short bout of practice on reaching behavior between late preterm and full-term infants at the onset of goal-directed reaching. Twelve late preterm infants and twelve full-term infants received reaching practice based on a serial schedule. Late preterm and full-term infants were assessed in 3.

Effect of weight load added to wrists on manual non-exploratory and exploratory behaviors in infants.

Investigating manual actions when infants' upper limbs are heavier can provide information on whether mechanical forces can influence the early ability of exploring grasped objects. This study assessed whether additional weight load affected typical infants' manual non-exploratory and exploratory behaviors. Ten healthy full-term infants were evaluated longitudinally at 5, 6, and 7 months of age.

The effect of a short bout of practice on reaching behavior in late preterm infants at the onset of reaching: a randomized controlled trial.

The purpose of this study was to examine the effects of a short bout of practice on reaching behavior in late preterm infants at the onset of goal-directed reaching. The study was designed as a blind, three-arm parallel-group, randomized controlled, clinical trial. Thirty-six late preterm infants were recruited from a maternity hospital and allocated according to computer generated randomization into groups that received reaching practice based on either a blocked schedule, a serial schedule, or no practice.

Development of exploratory behavior in late preterm infants.

Exploratory behaviors of 9 late preterm infants and 10 full-term infants were evaluated longitudinally at 5, 6 and 7 months of age. Eight exploratory behaviors were coded. The preterm infants mouthed the object less and had delayed gains in Waving compared to the full-term infants.

Additional weight influences the reaching behavior of low-risk preterm infants.

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).

Proximal and distal adjustments of reaching behavior in preterm infants.

The authors aimed to investigate proximal and distal adjustments of reaching behavior and grasping in 5-, 6-, and 7-month-old preterm infants. Nine low-risk preterm and 10 full-term infants participated. Both groups showed the predominance of unimanual reaching, an age-related increase in the frequency of vertical-oriented and open hand movement, and also an increase in successful grasping from 6 to 7 months.