Parents bring in their 6-week-old, thriving, breastfed infant due to inconsolable crying episodes. The crying lasts about 4 hours every evening, started 3 weeks ago, and occurs almost daily. The physical exam is normal. The mother asks if switching to a soy-based formula would help. Based on evidence, what is the most accurate advice regarding dietary changes for this infant with colic?
A 7-year-old girl is brought in for a well-child check. Her height is at the 3rd percentile, following this channel since infancy. Her mother is 157cm (5 feet 2 inches) tall and her father is 167cm (5 feet 6 inches) tall. A bone age radiograph is ordered and is found to be consistent with her chronologic age of 7 years. Which of the following is the most likely diagnosis?
A newborn infant is being examined. The pediatrician notes the infant has a fixed focal length of about 8-12 inches, turns preferentially toward a female voice, and becomes quiet and alert when held and spoken to. The infant’s innate abilities and sensory predilections serve primarily to facilitate which crucial developmental process?
An 8-year-old girl is brought in for evaluation of “growing pains” and difficulty falling asleep. She describes an irresistible urge to move her legs at bedtime, which is relieved by walking around. Her complete blood count is normal. What is the most appropriate next laboratory test to order in the workup for restless legs syndrome?
A researcher is studying the effects of early childhood experiences on gene expression. Which epigenetic mechanism is most likely to be involved?
