Their name and structure are inspired by the human brain, mimicking the way that biological neurons signal to one another. ... Neural networks rely on training data to learn and improve their accuracy over timeArtificial neural networks (ANNs), usually simply called neural networks (NNs), are computing systems inspired by the biological neural networks that constitute animal brains. An ANN is based on a collection of connected units or nodes called artificial neurons, which loosely model the neurons in a biological brain.The artificial neural network is designed by programming computers to behave simply like interconnected brain cells. There are around 1000 billion neurons in the human brain.