What is a key milestone regarding the development of visual/reaching coordination at 6 months of age?

At 6 months of age, a significant milestone in visual and motor development is the disappearance of the asymmetric tonic neck reflex. This reflex is characterized by the infant's head turning to one side, which causes the arm and leg on that side to extend while the opposite arm and leg flex. As the child grows and develops more sophisticated motor skills, the presence of this reflex can inhibit the ability to engage in coordinated reaching and grasping.

By around 6 months, infants typically gain better control over their movements, enabling them to visually track objects and coordinate their reaching efforts effectively. The disappearance of the asymmetric tonic neck reflex marks an essential transition toward more intentional and purposeful movements, including reaching for toys or objects within their visual field. This developmental progression is critical as it sets the foundation for more complex motor skills and interactions with their environment.

The other reflexes mentioned are associated with earlier stages of development and typically disappear at different times. Therefore, while they are important milestones, they are not specifically tied to the advancements in visual/reaching coordination that characterize the 6-month mark.