Physiology The peak of fast EPSP or, fast IPSP is seen at what time after stimulus application: A 0.5 ms B 0.5 to 1.5 ms C 11.5 ms D 100-500 ms 💡 Explanation The peak of fast EPSP or, fast IPSP is seen at what time after stimulus application: ✓ Correct Answer: B. 0.5 to 1.5 ms