FIGURE 22-5 Common patterns in neural circuits. Neurons connect to one another to form functional circuits. Shown are three common patterns of connectivity that are found in many neural circuits. (a) In divergent neural circuits, a single neuron sends axonal branches to contact many different target neurons. (b) In convergent neural circuits, many different neurons send axonal branches that converge to contact a single target neuron. (c) In feedback circuits, a neuron sends an axon to communicate with a neuron that is presynaptic to it. Combinations of these and other patterns of interconnectivity function to communicate information within neural circuits.