Question

Arrange the milestones of locomotor development of a baby up to 4 months in their correct order:
A. Lift chest
B. Lift head
C. Fetal posture
D. Reach and miss
Choose the correct answer from the options given below:

• A. A, B, C, D
• B. C, B, A, D
• C. B, A, D, C
• D. C, B, D, A

Hint:

Remember the cephalocaudal principle: development proceeds from head to tail. So, a baby gains control over their {head} (lifting head) before their {chest} (lifting chest), and control of their trunk before their limbs (reaching).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The question asks to arrange several early motor milestones in the correct developmental sequence from birth up to about 4 months of age. This follows the principles of cephalocaudal (head-to-tail) and proximodistal (center-outward) development.
Step 2: Detailed Explanation:
The typical sequence of these early motor skills is:
C. Fetal posture: At birth (0 months), an infant's default posture when lying on their stomach is the fetal position, with knees tucked under them.
B. Lift head: By about 1 month, an infant can lift their head briefly while in the prone position (on their stomach).
A. Lift chest: By 2-3 months, they develop enough strength in their neck and upper trunk to lift their head and chest off the ground, supporting themselves on their forearms.
D. Reach and miss: At around 3-4 months, infants begin to develop voluntary reaching. Their initial attempts are often uncoordinated, leading to "reaching and missing" as they learn to control their arm and hand movements.
The correct sequence is C \(\rightarrow\) B \(\rightarrow\) A \(\rightarrow\) D.
Step 3: Final Answer:
The correct order of developmental milestones is C, B, A, D.