Memory replays are a multisensory sub-type of internal hallucination which result in a person reliving memories through the experience of vivid daydreams, reoccurring emotions or sensations, and hallucinations. At higher levels of intensity, these are often referred to as "flashbacks". The memories themselves can be anything from significant life events with high levels of personal meaning attributed to them, generic recent occurrences, or long forgotten experiences from childhood.
Memory replays are often accompanied by other coinciding effects such as scenarios and plots, internal hallucinations, and introspection. They are most commonly induced under the influence of heavy dosages of hallucinogenic compounds, such as psychedelics, dissociatives, and deliriants. However, they can also commonly occur during sobriety as a result of traumatic experiences, particularly when the person suffers from post-traumatic stress disorder.
Compounds within our psychoactive substance index which may cause this effect include:
Annectdotal reports which describe this effect with our experience index include:
- Emotionally charged autobiographical memories across the lifespan: the recall of happy, sad, traumatic, and involuntary memories (ncbi) | https://www.ncbi.nlm.nih.gov/pubmed/12507360
- A comparison of involuntary autobiographical memory retrievals | https://onlinelibrary.wiley.com/doi/abs/10.1002/acp.1264
- Memory in Posttraumatic Stress Disorder: Properties of voluntary and involuntary, traumatic and non-traumatic autobiographical memories in people with and without PTSD symptoms | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2597428/