When does the curvatures of vertebral column form??
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heya!!
Explanation:
As a neonate starts lifting its head, a 'secondary', cervical curvature begins to develop while the thoracic remains as a 'primary'. As the infant begins to crawl, then walk and assumes an upright posture, the lumbar (another 'secondary') curvature forms while the sacral remains in its primary configuration.
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