Its features boast adjustable speeds and side-to-side swing action as well as the typical front-to-back motion.
Part of the reason is that their front-to-back motion offers a smoother ride than traditional rockers.
Weakening of the trunk muscles around this age often leads to scoliosis (a side-to-side spine curvature) and kyphosis (a front-to-back curvature).
The most common site for encephalocele is along the front-to-back midline of the skull, usually at the rear, although frontal encephaloceles are more common among Asians.