Unformatted text preview: not. “positive enough” for threshold of activation Must counter two effects: IPSPs and the energy lost in traveling to axon hillock The action potential is simply a massive momentary change in the potential in the cell. Huge depolarization from -70 to +50. ALL of NONE. How will my cells know there is more pain? Greater accumulation of such a signal. Spatial summation : WHERE is happens matters. Loses less energy the closer to the axon hillock it is....
View Full Document
- Winter '10
- EPSP, massive momentary change