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Dividing NG2 cells with action potentials. (A) An example of nondividing cells (5 of 15 cells) in visual cortex with all-or-none action potential. (B) An example of dividing cells (11 of 58 cells) with all-or-none action potential. (C) An example of dividing NG2 cells (44 of 58 cells) with graded spikes that have greater amplitudes at stronger depolarization. (D) An example of dividing NG2 cells (3 of 58 cells) without any spike even when the cell was depolarized to 0 mV.
