The frequency of membrane oscillations varies from trial to trial in chattering cellsIntracellular recordings in vivo from a chattering cell (A) and a regular spiking cell (B) reveal that the frequency of membrane oscillations varies from trial to trial (A). In the regular spiking cell, there is very little activity in the 30-70 Hz range during visual stimulation. The upper trace in each set (1-3) is the membrane potential during the spontaneous activity prior to presentation of the visual stimulus (a moving bar). The bottom trace in each set is the membrane potential of the cell during the response to the visual stimulus.
From Gray, C.M. and McCormick, D.A. Chattering cells: superficial pyramidal neurons contributing to the generation of synchronous oscillations in the visual cortex. Science 274: 109-113.