New theory explains how critical periods are triggered during development of the nervous system

Experiments performed in the 1960s showed that rearing young animals with one eye closed dramatically altered brain development such that the parts of the visual cortex that would normally process information from the closed eye instead process information from the open eye. These effects can be induced only within a specific period of time—a
Experiments performed in the 1960s showed that rearing young animals with one eye closed dramatically altered brain development such that the parts of the visual cortex that would normally process information from the closed eye instead process information from the open eye. These effects can be induced only within a specific period of time—a 'critical' period during which the developing nervous system is particularly sensitive to its environment.

Critical Period in Brain Development: Definition, Importance

The critical period for astrogenesis and synaptic circuit formation

What Is the Fight-or-Flight Response?

Cardiovascular System

Neuron - Wikipedia

Frontiers How Musical Training Shapes the Adult Brain: Predispositions and Neuroplasticity

A new mechanism of nervous system plasticity: activity-dependent myelination

Critical Ingredients for Brain Development

Critical Periods of Development - Mother To Baby