The science of moms

Mothers may be the glue that holds many families together, but no two mommies are alike. Still, there are some things moms do have in common — and at the top of that list is the huge impact they have on the lives of their children. To get to the core of these very important family figures, moms are the subject of scientific studies all over the world. Here is the good news in some of the findings.

Good moms have smarter kids

School-age children whose mothers nurtured them early in life have brains with a larger hippocampus, a key structure important to learning, memory, and response to stress, according to research in the Proceedings of the National Academy of Sciences.

The research, by child psychiatrists and neuroscientists at Washington University School of Medicine, was the first to show that a mother’s nurturing is linked to this critical region of children’s brain anatomy.

“This study validates something that seems to be intuitive, which is just how important nurturing parents are to creating adaptive human beings,” research author Dr. Joan L. Luby, said when the study was released. “I think the public health implications suggest that we should pay more attention to parents’ nurturing, and we should do what we can as a society to foster these skills because clearly nurturing has a very, very big impact on later development.”

Being an empathetic mom goes a long way

Nurturing mothers have always garnered accolades for kissing boo-boos and soothing children to sleep with lullabies. Now they’re getting credit for their offspring’s physical health in middle age.

In a long-term study published in the journal Psychological Science, psychologists found that even among groups that would have higher rates of chronic illness in adulthood, adults who had nurturing mothers in childhood fared better in physical health in midlife. It’s just more proof of the huge impact good moms can have.

Attentive moms help keep kids off drugs

Through daily interactions, good moms help children understand healthy boundaries, learn self-control and make good decisions. But it goes beyond that.

A strong mother-child bond in childhood, especially in the first three years of life, develops the brain chemistry that can help people resist drug and alcohol addition later in life. The research, conducted in Australia, found that some people’s lack of resilience to addictive behaviors may be linked to poor development of their oxytocin systems.

The antidote? A loving and nurturing mom, of course.

Moms teach their children without even trying

Scientists have discovered that babies only hours old are able to differentiate between sounds from their native language and a foreign language. This finding indicates that babies begin absorbing language while still in the womb during the last 10 weeks of pregnancy, earlier than previously thought.

“The mother has first dibs on influencing the child’s brain,” said Patricia Kuhl, co-author and co-director of the Institute for Learning & Brain Sciences at the University of Washington. “The vowel sounds in her speech are the loudest units, and the fetus locks onto them.” Now, if we could just start training them to pick up their room while in the womb.

Mom’s voice is as comforting as a hug

A simple phone call from mom can calm frayed nerves by sparking the release of a powerful stress-quelling hormone, according to researchers. The study, at the University of Wisconsin-Madison, looked at a group of 7- to 12-year-old girls who were challenged to answer math questions in front of a panel of strangers. A third of the girls were comforted by their mothers in person with a hug or pat on the back, a third were given a neutral video to watch, and a third were allowed to talk to their mom on the phone.

The results were dramatic: the children who got to interact with their mothers had virtually the same positive hormonal response, whether they interacted in person or over the phone. The girls’ levels of oxytocin, often called the “love hormone” and strongly associated with emotional bonding, rose significantly among the girls who had contact with their moms, while the stress-marking cortisol washed away. The video-watching group did not experience the same benefits.

Sometimes, less mom is more

When you plop on the floor to play with your child, there’s more going on than just a game. In a study that looked at the dynamics of play, researchers found that the more moms tried to control the content and pace of the game, the more children pulled away. Children in the study also expressed more negative feelings toward their mothers when the mothers were highly directive. For example, during play with her child, a highly directive mother might make her toddler put the plastic cow in the toy barn through the barn’s door instead of through its window. While mothers often think they are helping their children by correcting them, they are limiting the children’s creativity and taking the fun out of the game, said Jean Ispa, lead author of the study.

“Children flourish when they have opportunities to make choices about what they do, particularly in play situations,” said Ispa, and professor of human development and family studies at the University of Missouri. “Mothers who are highly directive do not allow that kind of choice.”

Moms can counter that effect with affection, however.

“Children take in the meaning of what their mothers are trying to do, so if a mom is being very directive and is generally a very warm person, I think the child feels, ‘My mom is doing this because she cares about me, and she’s trying to do the best for me,’ ” Ispa said. “If that warmth is missing, then the child might feel, ‘My mom is trying to control me, and I don’t like it.’ ”

KiKi Bochi is a mother of two who still marvels at her power. A long-time journalist, she writes about family health.