The following are health and medical definitions of terms that appear in the Lung Cancer article. Abdomen: The belly, that part of the body that contains all of the structures between the... See the entire definition of Abdomen. Abdominal: Relating to the abdomen, the belly, that part of the body that contains all of ...
Head and neck muscles are the first to come under a baby's control. Muscle control moves downward, toward the feet. Babies typically roll from tummy to back first beginning at around 4 months of age and then back to tummy around 6 months of age, according to the A.I. DuPont Hospital for Children.
Baby Milestones 0-4 Months: Helping Him Roll Over. Rolling over, a milestone that typically occurs between 4 and 6 months, signifies the first time your baby is able to coordinate multiple muscles to achieve a common goal, says Kathryn Barnard, Ph.D., an infant mental health expert in Seattle. It's as if they realize, Hey, this body of mine can move!.