The document summarizes several aspects of brain development including: 1) The brain begins forming in the embryo around 2 weeks as the neural tube, which later develops into the hindbrain, midbrain and forebrain. 2) Neuron development involves proliferation, migration, differentiation, myelination and synaptogenesis. 3) Experience and activity influence brain development and plasticity through processes like synapse formation and strengthening. 4) The developing brain is vulnerable to various insults but can recover through mechanisms like collateral sprouting and reorganization.

1. Development of The Brain