Brain activity can be described at multiple levels, including at the levels of single neurons and neural networks. A neural network is a set of interconnected and interacting neural units and can be described as a dynamical system that performs computations through its temporal evolution [1] (Box 1). For example, the temporal evolution of the activity of a network of motor cortex neurons performs the computation of converting motor planning signals to motor execution signals [2–9]. Neural networks possess computationally relevant properties that are not found in individual neurons.
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