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Difficulty: MediumNormal Growth and Development

A 4-year-old girl presents to the primary care clinic with her adoptive parents for a routine health maintenance visit. The parents have no immediate concerns but request a summary of normal developmental progression to better understand her past growth. On physical examination, the child is interactive, and her height, weight, and head circumference track along the 50th percentiles. The attending physician discusses the sequential acquisition of milestones across motor, language, and social domains. Arrange the following developmental milestones in the correct chronological order of their typical appearance in a healthy child, from earliest to latest.

  1. 1Exhibits a social smile and begins to coo
  2. 2Sits without support and transfers objects between hands
  3. 3Uses a neat pincer grasp and pulls to stand
  4. 4Kicks a ball and speaks in two-word phrases
  5. 5Pedals a tricycle and copies a drawn circle

Answer

The correct chronological sequence is: 1) Exhibits a social smile and begins to coo (2 months), 2) Sits without support and transfers objects between hands (6 months), 3) Uses a neat pincer grasp and pulls to stand (9 months), 4) Kicks a ball and speaks in two-word phrases (24 months), and 5) Pedals a tricycle and copies a drawn circle (36 months).
The chronological progression of normal pediatric development follows a predictable, cephalocaudal, and proximodistal pattern. Social smiling and cooing are early communicative milestones emerging at 2 months. By 6 months, infants develop sufficient truncal tone to sit without support and can transfer objects between their hands. By 9 months, fine motor skills refine to a neat pincer grasp, and infants can pull themselves to a standing position. At 24 months (2 years), toddlers can kick a ball and begin combining words into two-word phrases. Finally, at 36 months (3 years), children acquire the coordination to pedal a tricycle and the visual-motor integration to copy a circle.

Step-by-Step Solution

1
Identify the milestones associated with early infancy.
Exhibiting a social smile and cooing are expected at 2 months of age.
This establishes the earliest point in the developmental sequence.
2
Determine the age for mid-infancy gross and fine motor milestones.
Sitting without support and transferring objects hand-to-hand occur at 6 months.
Core truncal stability and bilateral hand coordination follow early social responses.
3
Determine the age for late-infancy fine motor refinement and upright mobility.
Using a neat pincer grasp and pulling to stand are achieved at 9 months.
Distal fine motor control and lower extremity strength for standing develop in the late first year.
4
Identify the milestones characteristic of a two-year-old toddler.
Kicking a ball and speaking in two-word phrases are 24-month milestones.
Language rapidly expands and gross motor skills become more dynamic in the second year.
5
Identify the milestones associated with a three-year-old preschooler.
Pedaling a tricycle and copying a drawn circle are 36-month milestones.
Advanced bilateral coordination and fine motor drawing skills mark early preschool development.

Key Concept

Chronological acquisition of normal pediatric developmental milestones across gross motor, fine motor, language, and social domains.
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Topics

Normal Growth and Development

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