1. Which milestone is developmentally appropriate for a 2-month-old infant when the nurse pulls
the infant to a sitting position?
a. Head lag is present when the infants trunk is lifted.
b. The infant is able to support the head when the trunk is lifted.
c. The infant is briefly able to hold the head erect.
d. The infant is fully able to support and hold the head in a straight line.
ANSWER: C
A 2-month-old infant is able to hold the head erect only briefly and continues to have some head
lag. It is not until 4 months of age that the infant can keep his or her head in a straight line when
pulled to a sitting position.