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<p>activity is synchronized, and characterised by slow waves with a frequency range of 0.5-4.5 <a href="page.php?w=Hertz">Hz</a> and a relatively high amplitude power with peak-to-peak amplitude greater than 75&nbsp;uV. The first section of the wave signifies a "down state", an inhibition or hyperpolarizing phase in which the <a href="page.php?w=neuron">neuron</a>s in the <a href="page.php?w=neocortex">neocortex</a> are silent. This is the period when the neocortical neurons can rest. The second section of the wave signifies an "up state", an excitation</p><p>
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