Emotional Brain Development: Neurobiological Indicators from Fetus Through Toddlerhood

The maturation of brain regions involved in emotion regulation-particularly the amygdala and prefrontal cortex-from fetal life to age two is a dynamic process shaped by genetic and environmental factors. Early experiences, especially responsive caregiving, promote the growth of neural circuits supporting emotional expression and regulation. In contrast, early adversity such as neglect or chronic stress may disrupt these circuits and increase vulnerability to emotional difficulties. Elevated levels of placental CRH are linked to alterations in fetal brain development related to emotion. Neurodevelopmental processes like synaptic pruning and myelination, active during the first years, further shape emotional circuitry. These findings underscore the importance of early caregiving and timely interventions in fostering healthy emotional development. The present article proposes an integrative conceptual framework for early emotional and cognitive development, combining neurobiological models with contemporary theories in developmental psychology.