02/10 Child development Development

Brain Development and Growth

  • By the end of the discussed age period, brain weight is approximately 90% of its developmental maturity.

    • Infancy Stage
    • At birth, a significant number of neurons are present, but connections between them are still developing.
    • Synapses: Connections between neurons facilitating communication.
      • Definition: Synapses are the highways that link neurons, allowing for communication.
      • Importance of synapses in the ongoing process of brain development.
      • Synaptic Pruning: The brain eliminates unused synapses (connections) to optimize efficiency.
      • Concept summarized as "Use it or lose it". If neurons/synapses are not engaged, they are pruned.

  • Myelination

    • The process of coating neurons with a fatty substance, myelin, which enhances neurotransmission speed and efficiency.
    • Example: A child learning to walk typically exhibits wobbling due to incomplete myelination leading to poor coordination.
    • As myelination progresses, walking coordination improves.
    • Myelination's role in broader cognitive functions: enhances attention and coordination.

Corpus Callosum Development

  • The corpus callosum facilitates communication between the brain's left and right hemispheres, undergoing significant growth between ages three to six.

    • Left Hemisphere Functions: Mainly responsible for language development and speech (e.g., Broca's area).
    • Right Hemisphere Functions: Controls the left side of the body.
    • Importance of interconnectivity through the corpus callosum in coordinating body movements such as walking.

  • Stroke Victims

    • If the left hemisphere is affected, it can result in mobility issues on the right side of the body, demonstrating the lateralization of brain functions.
    • Example: Case study involving Genie, highlighting neuroplasticity where lack of use leads to deterioration of speech capabilities.

Prefrontal Cortex Development

  • The prefrontal cortex matures slowly and continues developing into emerging adulthood.

    • In early childhood, the prefrontal cortex begins to function but is still immature.
    • Relation to emotional regulation: Limited capacity leads to common behaviors in young children such as tantrums as they struggle with emotional control.
    • Factors influencing emotional regulation: Biological, environmental (trauma), and temperamental influences.

  • Developing impulse control and planning abilities are crucial but still rudimentary in early childhood.

    • Example: Challenging tasks, such as a series of steps to complete a task, are typically too complex for children around ages three or four, highlighting the need for age-appropriate expectations in educational settings.

Gross Motor Skill Milestones

  • Developmental milestones in gross motor skills by age:

    • Age 2: Kick a ball, pick up objects while standing.

    • Age 3: Pedal a tricycle, walk up stairs using alternating feet.

    • Age 4: Throw objects overhand, hop on one foot.

    • Age 6: Skip, ride a bicycle with training wheels.

    • Note on expectations: Milestones do not require proficiency wired like adults; for example, throwing a ball overhand requires refined motor skills, not merely the ability to throw.

Fine Motor Skill Milestones

  • Fine motor skills develop more slowly than gross motor skills:
    • Age 2: Turn a knob, turn pages of a book.
    • Age 3: Begin to draw simple shapes or recognizable figures (e.g., tadpole people).
    • Age 4 and 5: Better pencil control, more cohesive drawing.
    • Age 5: Dress independently, tie shoes (partially).

The Zone of Proximal Development & Scaffolding

  • Zone of Proximal Development (ZPD): The level of difficulty where assistance allows a child to succeed at a task they cannot accomplish alone.

    • Example: Tying shoes can involve steps where the adult assists with parts the child is unable to do.

  • Scaffolding: Temporary support provided to a child, gradually removed as competence increases.

    • Example implementation in teaching: Offering physical or verbal assistance and gradually reducing support as the child becomes more capable.

Toilet Training

  • Begins around ages 24-36 months, with 98% trained by age three.

    • Readiness Indicators:
    • Interest in the potty.
    • Staying dry for periods.
    • Ability to pull pants up/down.
    • Communicating needs and accidents.

  • Process typically results in daytime bladder control within 2-3 months; however, nighttime control may take years.

    • Addressing potential frustrations when realistic expectations aren’t met in bladder control at night.

Sexual Development in Early Childhood

  • Normal exploration and curiosity about body awareness, often expressed through play.
    • Parents should respond calmly, promoting healthy conversations and setting boundaries without shame.
    • Could involve discussions on who is allowed to see/touch private parts, emphasizing social norms and expectations.

Nutrition and Health

  • Importance: Critical support for growth, brain development, and emotional regulation.
  • Children may develop fixed eating preferences (e.g., only wanting mac and cheese).
    • Parents should encourage balanced diets while ensuring children are involved in choices to develop healthy eating habits.

Sleep Patterns

  • Infants require 15-16 hours of sleep, tapering to 7-8 hours by age six.
  • Transitional phase from needing naps during the day to night-sleep consistency is crucial.
    • Sleep deprivation can lead to irritability and problems with emotional regulation.
  • Common sleep issues include nightmares and night terrors; normal occurrences linked to brain development and not always remembered by the child.

Child Abuse and Maltreatment

  • Development of laws and education aimed to prevent child neglect and abuse.

  • Different types of maltreatment can have long-term effects on physical and mental health.

  • Adverse Childhood Experiences (ACEs): More ACEs correlate with higher risks of mental health issues, chronic illnesses, and early mortality.

  • Understanding ACEs is vital for recognizing the impact of early childhood experiences on lifelong health and behavior.