Adapted from Reinforcement Learning: an Introduction by Sutton and BartoEven our brain has a group of subcortical nuclei situated at the base of the forebrain called **basal ganglia**, which, according to neuroscience, are responsible for action selection, that is, help us decide which of several possible actions to execute at any given time.
*Our experiments reveal several surprising results about large-scale nonconvex optimization. Firstly, asynchronous SGD, rarely applied to nonconvex problems, works very well for training deep networks, particularly when combined with Adagrad adaptive learning rates.*