Illustrate a mesmerizing, intricate, and vibrant steampunk-themed brain, brimming with a kaleidoscope of colors and intricate mechanical details. The brain, suspended in a transparent, glass dome, pulsates with energy and creativity, its convoluted surface adorned with an array of intricate gears, cogs, and steam-powered contraptions. Neon tubes of varying hues crisscross the brain, casting a mesmerizing glow that illuminates the surrounding workshop. The metallic sheen of brass and copper elements adds a touch of industrial elegance to the scene, while wisps of steam rise from ornate valves and pipes, creating a sense of motion and vitality. The brain's synapses spark with vibrant bursts of color, symbolizing the boundless potential of the mind in a steampunk-inspired world.