IPSP is the inhibitory postsynaptic potential, a release of neurotransmitter by the inhibitiory synapse which hyperpolarizes postsynaptic membrane temporarily by the flow of charged ions into the postsynaptic cell.
Events that occur in postsynaptic membrane:
- Chloride ions will enter postsynaptic membrane
- Potassium ions will leave postsynaptic membrane
- Small hyperpolarization occurs, leading to diminishing graded potential
- ↑ Alberts, et al. Molecular Biology of the Cell. 5th ed. Garland Science. 2008 pp 688