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Development of the nervous system

An exploration of how animal nervous systems are built from embryo to adulthood, tracing the molecular signals, cellular migrations, synapse formation, pruning, and ongoing plasticity that sculpt the brain and spinal cord—and what happens when these processes go wrong.

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Development of the nervous system - 100 Word Summary

A concise overview of how the nervous system is built, from neural tube formation to adult brain plasticity.

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Development of the nervous system - 250 Word Summary

A richer tour through how embryos construct nervous systems, the signals that guide each step, and the pruning and plasticity that refine them.

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Neural Induction: How Skin Cells Decide to Become Brain

Follow the moment when a sheet of embryonic “skin” is persuaded to switch fates and become the foundation of the entire nervous system.

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Shaping the Brain Tube into Forebrain, Midbrain, Hindbrain

Watch the simple neural tube balloon, bend, and subdivide into the recognizable regions of the human brain and spinal cord.

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Chemical Maps: Sonic Hedgehog, BMPs and Brain Axes

Journey inside the embryo where invisible gradients of molecules quietly decide which cells become sensory, which become motor, and which form the brain’s structural backbone.

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Neurons on the Move: Radial, Tangential and More

Trace the astonishing journeys neurons take from their birthplaces to their final homes, climbing scaffolds, riding axons, or weaving through the brain in unexpected ways.

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Survival of the Connected: Neurotrophic Factors

Discover how developing neurons compete for life-or-death survival signals, pruning the nervous system into a lean, efficient machine.

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Building Synapses: From Neuromuscular Junctions to the Cortex

Step into the microscopic world where nerves and their targets negotiate, cluster receptors, and refine connections to create precise communication points.

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Waves of Activity: How Spontaneous Firing Shapes Circuits

Before we see, hear, or move on purpose, spontaneous electrical storms sweep the brain, sculpting maps of the world and fine-tuning motor control.

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Pruning Connections: Synapse Elimination and Efficiency

Follow the ruthless but essential process in which the nervous system trims away weaker connections to sharpen its wiring and boost performance.

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Adult Neurogenesis and Mapping the Changing Brain

Explore how new neurons arise even in adult brains, and how cutting-edge mapping reveals neural circuits evolving across a lifetime.

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Development of the nervous system