Which of the following best describes the progression of standing in infancy?

• A. Initially reflexive, progress to volitional with CNS maturation
• B. Start standing with a stander immediately
• C. Never use standing in infancy
• D. Stand before crawling

Answer: (A)

In infancy, motor control moves from reflexive, automatic patterns to voluntary, purposeful actions as the nervous system matures. Early standing-related responses are reflexive and are driven by spinal and brainstem circuits; these are seen when a baby is held upright or supported in standing. As the CNS develops, myelination and cortical control increase, allowing the infant to balance and stand with increasing intentionality and then with less support, eventually becoming independent. That progression—starting with reflexive standing and evolving into voluntary standing with CNS maturation—best matches how typical development unfolds.

The other options don’t fit this biologically based sequence. Standing with a stander immediately isn’t how standing develops; many infants also start standing with support rather than being ready to stand unaided right away. Saying standing is never used in infancy contradicts normal development, and standing before crawling isn’t the usual order for most babies, who typically gain upright posture after some practice and other milestones.