Cover Picture: The firing pattern and subthreshold dynamics of a cortical neuron reflect the state of recurrent network activity. The behavior of neuron population activity can be formulated in analogy with phase transition phenomena in solid-state physics. The cover illustration shows membrane potential traces in different network states and a phase transition model in statistical physics (Ising model). See Fujisawa, Matsuki, and Ikegaya, pp. 639–654.
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