Can a stressor impact memory?
If you ever heard the term "Mental Block", this is one common effect of stressors to one's memories.
Stressors can either be innate or external.
Noise Pollution is a good example for external source, it can restrict concentration, disabling you from remembering quickly.
Lack of Sleep is a good innate stress, A tired body can cause a tired brain, restricting your concentration, disabling you to perform mentally efficiently.