A nerve cell sends signals to others through action potentials, which begin at the 'initial segment' of the neuron's axon. It is now shown that changes in electrical activity can alter the position of this initial segment in cultured rat hippocampal neurons. The resulting increase in intrinsic excitability — the tendency to fire action potentials — represents a new form of neuronal plasticity and could provide a new target in the control of epilepsy.
- Matthew S. Grubb
- Juan Burrone
