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A nurse is assessing a 4-month-old infant on a pediatric unit.
Which of the following findings should the nurse expect?

A.

Uses thumb and index fingers in a pincer grasp.

B.

Closed posterior fontanel.

C.

Lateral incisors.

D.

Sitting steadily without support.

Answer and Explanation

The Correct Answer is B

Choice A rationale

A pincer grasp, using the thumb and index finger to pick up small objects, typically develops around 9 to 12 months of age, not at 4 months.

 

Choice B rationale

The posterior fontanel typically closes by the age of 2 to 3 months, so a 4-month-old infant would be expected to have a closed posterior fontanel. This finding is consistent with normal development.

 

Choice C rationale

Lateral incisors, the teeth on either side of the front teeth, typically erupt around 9 to 13 months of age, not at 4 months.

 

Choice D rationale

Sitting steadily without support generally occurs closer to 6 to 8 months of age, so it would not be expected in a 4-month-old infant.


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View Related questions

Correct Answer is B

Explanation

Choice A rationale

A pincer grasp, using the thumb and index finger to pick up small objects, typically develops around 9 to 12 months of age, not at 4 months.

Choice B rationale

The posterior fontanel typically closes by the age of 2 to 3 months, so a 4-month-old infant would be expected to have a closed posterior fontanel. This finding is consistent with normal development.

Choice C rationale

Lateral incisors, the teeth on either side of the front teeth, typically erupt around 9 to 13 months of age, not at 4 months.

Choice D rationale

Sitting steadily without support generally occurs closer to 6 to 8 months of age, so it would not be expected in a 4-month-old infant.

Correct Answer is B

Explanation

Choice A rationale

Constructing a model airplane may require smaller parts and more intricate work, not ideal for a 4-year-old child.

Choice B rationale

Putting together a large-piece puzzle is suitable for fine motor skills development and can be done while in isolation.

Choice C rationale

Playing in the hallway would expose the child to other areas and people, defeating the purpose of airborne precautions.

Choice D rationale

Watching a video game in the playroom is not feasible as it would require leaving the isolation area.

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