There are 5 key scientific concepts which are the building blocks of the core story of child development.

Brain Architecture

The basic architecture of the brain is constructed through an ongoing process that begins before birth and continues into adulthood. Simpler neural connections and skills form first, followed by more complex circuits and skills. In the first few years of life, more than 1 million new neural connections form every second. After this period of rapid proliferation, connections are reduced through a process called pruning, which allows brain circuits to become more efficient.

These connections enable lightning-fast communication among neurons that specialize in different kinds of brain functions. The early years are the most active period for establishing neural connections, but new connections can form throughout life and unused connections continue to be pruned. Because this dynamic process never stops, it is impossible to determine what percentage of brain development occurs by a certain age. More importantly, the connections that form early provide either a strong or weak foundation for the connections that form later.

Although genes provide the blueprint for the formation of brain circuits, these circuits are reinforced by repeated use. A major ingredient in this developmental process is the serve and return interaction between children and their parents and other caregivers in the family or community. In the absence of responsive caregiving—or if responses are unreliable or inappropriate—the brain’s architecture does not form as expected, which can lead to disparities in learning and behavior. Ultimately, genes and experiences work together to construct brain architecture.

The brain is a highly integrated organ and its multiple functions operate in coordination with one another. Emotional well-being and social competence provide a strong foundation for emerging cognitive abilities, and together they are the bricks and mortar of brain architecture. The emotional and physical health, social skills, and cognitive-linguistic capacities that emerge in the early years are all important for success in school, the workplace, and in the larger community.

Experiencing stress is an important part of healthy development. Activation of the stress response produces a wide range of physiological reactions that prepare the body to deal with threat. However, when these responses remain activated at high levels for significant periods of time, without supportive relationships to help calm them, toxic stress results. This can impair the development of neural connections, especially in the areas of the brain dedicated to higher-order skills.

Serve and Return

Serve and return interactions shape brain architecture. When an infant or young child babbles, gestures, or cries, and an adult responds appropriately with eye contact, words, or a hug, neural connections are built and strengthened in the child’s brain that support the development of communication and social skills. Much like a lively game of tennis, volleyball, or Ping-Pong, this back-and-forth is both fun and capacity-building. When caregivers are sensitive and responsive to a young child’s signals and needs, they provide an environment rich in serve and return experiences.

Because responsive relationships are both expected and essential, their absence is a serious threat to a child’s development and well-being. Healthy brain architecture depends on a sturdy foundation built by appropriate input from a child’s senses and stable, responsive relationships with caring adults. If an adult’s responses to a child are unreliable, inappropriate, or simply absent, the developing architecture of the brain may be disrupted, and subsequent physical, mental, and emotional health may be impaired. The persistent absence of serve and return interaction acts as a “double whammy” for healthy development: not only does the brain not receive the positive stimulation it needs, but the body’s stress response is activated, flooding the developing brain with potentially harmful stress hormones.

Building the capabilities of adult caregivers can help strengthen the environment of relationships essential to children’s lifelong learning, health, and behavior. A breakdown in reciprocal serve and return interactions between adult caregivers and young children can be the result of many factors. Adults might not engage in serve and return interactions with young children due to significant stresses brought on by financial problems, a lack of social connections, or chronic health issues. Caregivers who are at highest risk for providing inadequate care often experience several of these problems simultaneously. Policies and programs that address the needs of adult caregivers and help them to engage in serve and return interactions will in turn help support the healthy development of children.

Executive Function and Self-Regulation

Executive function and self-regulation skills are the mental processes that enable us to plan, focus attention, remember instructions, and juggle multiple tasks successfully. Just as an air traffic control system at a busy airport safely manages the arrivals and departures of many aircraft on multiple runways, the brain needs this skill set to filter distractions, prioritize tasks, set and achieve goals, and control impulses.

When children have opportunities to develop executive function and self-regulation skills, individuals and society experience lifelong benefits. These skills are crucial for learning and development. They also enable positive behavior and allow us to make healthy choices for ourselves and our families.

Executive function and self-regulation skills depend on three types of brain function: working memory, mental flexibility, and self-control. These functions are highly interrelated, and the successful application of executive function skills requires them to operate in coordination with each other.

• Working memory governs our ability to retain and manipulate distinct pieces of information over short periods of time.

• Mental flexibility helps us to sustain or shift attention in response to different demands or to apply different rules in different settings.

• Self-control enables us to set priorities and resist impulsive actions or responses.

Children aren’t born with these skills—they are born with the potential to develop them. Some children may need more support than others to develop these skills. In other situations, if children do not get what they need from their relationships with adults and the conditions in their environments—or (worse) if those influences are sources of toxic stress—their skill development can be seriously delayed or impaired. Adverse environments resulting from neglect, abuse, and/or violence may expose children to toxic stress, which can disrupt brain architecture and impair the development of executive function.

Providing the support that children need to build these skills at home, in early care and education programs, and in other settings they experience regularly is one of society’s most important responsibilities. Growth-promoting environments provide children with “scaffolding” that helps them practice necessary skills before they must perform them alone. Adults can facilitate the development of a child’s executive function skills by establishing routines, modeling social behavior, and creating and maintaining supportive, reliable relationships. It is also important for children to exercise their developing skills through activities that foster creative play and social connection, teach them how to cope with stress, involve vigorous exercise, and over time, provide opportunities for directing their own actions with decreasing adult supervision.

Toxic Stress

Learning how to cope with adversity is an important part of healthy child development. When we are threatened, our bodies prepare us to respond by increasing our heart rate, blood pressure, and stress hormones, such as cortisol. When a young child’s stress response systems are activated within an environment of supportive relationships with adults, these physiological effects are buffered and brought back down to baseline. The result is the development of healthy stress response systems. However, if the stress response is extreme and long-lasting, and buffering relationships are unavailable to the child, the result can be damaged, weakened systems and brain architecture, with lifelong repercussions.

It’s important to distinguish among three kinds of responses to stress: positive, tolerable, and toxic. As described below, these three terms refer to the stress response systems’ effects on the body, not to the stressful event or experience itself:

• Positive stress response is a normal and essential part of healthy development, characterized by brief increases in heart rate and mild elevations in hormone levels. Some situations that might trigger a positive stress response are the first day with a new caregiver or receiving an injected immunization.

• Tolerable stress response activates the body’s alert systems to a greater degree as a result of more severe, longer-lasting difficulties, such as the loss of a loved one, a natural disaster, or a frightening injury. If the activation is time-limited and buffered by relationships with adults who help the child adapt, the brain and other organs recover from what might otherwise be damaging effects.

• Toxic stress response can occur when a child experiences strong, frequent, and/or prolonged adversity—such as physical or emotional abuse, chronic neglect, caregiver substance abuse or mental illness, exposure to violence, and/or the accumulated burdens of family economic hardship—without adequate adult support. This kind of prolonged activation of the stress response systems can disrupt the development of brain architecture and other organ systems, and increase the risk for stress-related disease and cognitive impairment, well into the adult years.

When toxic stress response occurs continually, or is triggered by multiple sources, it can have a cumulative toll on an individual’s physical and mental health—for a lifetime. The more adverse experiences in childhood, the greater the likelihood of developmental delays and later health problems, including heart disease, diabetes, substance abuse, and depression. Research also indicates that supportive, responsive relationships with caring adults as early in life as possible can prevent or reverse the damaging effects of toxic stress response.

Resilience

Reducing the effects of significant adversity on children’s healthy development is essential to the progress and prosperity of any society. Science tells us that some children develop resilience, or the ability to overcome serious hardship, while others do not. Understanding why some children do well despite adverse early experiences is crucial, because it can inform more effective policies and programs that help more children reach their full potential.

One way to understand the development of resilience is to visualize a balance scale or seesaw. Protective experiences and coping skills on one side counterbalance significant adversity on the other. Resilience is evident when a child’s health and development tips toward positive outcomes — even when a heavy load of factors is stacked on the negative outcome side.

The single most common factor for children who develop resilience is at least one stable and committed relationship with a supportive parent, caregiver, or other adult. These relationships provide the personalized responsiveness, scaffolding, and protection that buffer children from developmental disruption. They also build key capacities—such as the ability to plan, monitor, and regulate behavior—that enable children to respond adaptively to adversity and thrive. This combination of supportive relationships, adaptive skill-building, and positive experiences is the foundation of resilience.

Children who do well in the face of serious hardship typically have a biological resistance to adversity and strong relationships with the important adults in their family and community. Resilience is the result of a combination of protective factors. Neither individual characteristics nor social environments alone are likely to ensure positive outcomes for children who experience prolonged periods of toxic stress. It is the interaction between biology and environment that builds a child’s ability to cope with adversity and overcome threats to healthy development.

Research has identified a common set of factors that predispose children to positive outcomes in the face of significant adversity. Individuals who demonstrate resilience in response to one form of adversity may not necessarily do so in response to another. Yet when these positive influences are operating effectively, they “stack the scale” with positive weight and optimize resilience across multiple contexts. These counterbalancing factors include

1. facilitating supportive adult-child relationships;

2. building a sense of self-efficacy and perceived control;

3. providing opportunities to strengthen adaptive skills and self-regulatory capacities; and

4. mobilizing sources of faith, hope, and cultural traditions.

Learning to cope with manageable threats is critical for the development of resilience. Not all stress is harmful. There are numerous opportunities in every child’s life to experience manageable stress—and with the help of supportive adults, this “positive stress” can be growth-promoting. Over time, we become better able to cope with life’s obstacles and hardships, both physically and mentally.

The capabilities that underlie resilience can be strengthened at any age. The brain and other biological systems are most adaptable early in life. Yet while their development lays the foundation for a wide range of resilient behaviors, it is never too late to build resilience. Age-appropriate, health-promoting activities can significantly improve the odds that an individual will recover from stress-inducing experiences. For example, regular physical exercise, stress-reduction practices, and programs that actively build executive function and self-regulation skills can improve the abilities of children and adults to cope with, adapt to, and even prevent adversity in their lives. Adults who strengthen these skills in themselves can better model healthy behaviors for their children, thereby improving the resilience of the next generation.

Video Source: https://www.youtube.com/watch?v=TzMxrMJBZdQ