PCS PCS Developmental Milestones and Neurodevelopment 2 — Questions and Answers
Question 1: Object permanence, the understanding that objects continue to exist when out of sight, typically develops during which Piagetian stage?
- Preoperational stage
- Sensorimotor stage (Correct answer)
- Concrete operational stage
- Formal operational stage
Correct answer: Sensorimotor stage
Object permanence develops during the sensorimotor stage, typically around 8–12 months of age.
Question 2: Which primitive reflex should be fully integrated by 6 months and, if persistent, may interfere with rolling and crawling?
- Asymmetrical tonic neck reflex (ATNR) (Correct answer)
- Galant reflex
- Babinski reflex
- Stepping reflex
Correct answer: Asymmetrical tonic neck reflex (ATNR)
The ATNR should integrate by 4–6 months; persistence can inhibit midline crossing and bilateral coordination.
Question 3: A child who cannot stack 2 blocks by 15 months may be showing a delay in which developmental domain?
- Gross motor
- Fine motor (Correct answer)
- Language
- Social-emotional
Correct answer: Fine motor
Stacking 2 blocks by 15 months is a fine motor milestone reflecting hand-eye coordination and pincer grasp development.
Question 4: Myelination of the central nervous system in children proceeds in which general direction?
- Caudal to cephalic and distal to proximal
- Cephalic to caudal and proximal to distal (Correct answer)
- Random, with no predictable pattern
- Distal to proximal only
Correct answer: Cephalic to caudal and proximal to distal
CNS myelination follows a cephalic-to-caudal and proximal-to-distal pattern, explaining the sequence of motor skill development.
Question 5: By what age should a typically developing child use at least 50 words and begin combining two words?
- 12 months
- 18 months
- 24 months (Correct answer)
- 30 months
Correct answer: 24 months
A vocabulary of 50+ words and two-word combinations (e.g., 'more milk') is expected by 24 months.
Question 6: Which assessment tool is commonly used by pediatric specialists to measure functional motor abilities in children with neurological conditions?
- GMFM (Gross Motor Function Measure) (Correct answer)
- MMSE (Mini-Mental State Examination)
- FIM (Functional Independence Measure)
- GCS (Glasgow Coma Scale)
Correct answer: GMFM (Gross Motor Function Measure)
The GMFM is validated specifically for children with conditions like cerebral palsy and Down syndrome to measure gross motor function.
PCS PCS Developmental Milestones and Neurodevelopment 2
Object permanence, the understanding that objects continue to exist when out of sight, typically develops during which Piagetian stage?