Concise Summary of Brain Development

Importance: Childhood and adolescence mark significant behavioral, emotional, hormonal, and cognitive changes linked to brain structure.
Growth Rates: Different brain parts develop at varying rates, affecting psychiatric disorders that may emerge in adolescence.

Adult Brain: Weighs approximately 1.3 kg; composed of 60% fat, 40% water, protein, carbohydrates, and salts; comprises grey and white matter.

Neurons: Basic units of the brain with types including sensory, motor, and interneurons, involved in transmitting information.
Glial Cells: Supporting cells that maintain neuron health, form myelin, and are integral to communication in the brain.
- Types: Astrocytes (nutrient supply), oligodendrocytes (myelin production), microglia (immune function), Schwann cells (peripheral system support).

Neurogenesis: New neuron generation starts 42 days post-conception, followed by migration to brain regions.
Myelination: Formation of myelin sheath begins at 7 months gestation, accelerating until adulthood, influencing cognitive abilities.
Synaptogenesis: Rapid formation of synapses occurs during pre- and postnatal periods, essential for cognitive development.
Apoptosis and Synaptic Pruning: Excess neurons are eliminated through apoptosis, and unused synapses are pruned based on stimulation.

Experience-Dependent Plasticity: Neural connections reorganize based on individual experiences, crucial for developing cognitive abilities and behaviors.