Please correct me if I am wrong, but a median system is something like having multiple facets/alters without the amnesia, right? I am not completely familiar with the natural multiple terms. In that case, it sounds like OSDD and dissociation can be caused by multiple different disorders, including anxiety, depression, and borderline personality disorder. Dissociation is a symptom of many different mental illnesses.
Trauma is subjective. There is no “line” between what is considered traumatic and what is not considered traumatic, due to the fact that people react to events differently. There is no specific diagnostic criteria in the DSM-V that says that trauma must be present to be diagnosed with DID, but due to the high correlation rate between trauma and DID, professionals usually will ask about trauma before diagnosing. PTSD is a co-morbid condition with DID and trauma is required to receive a diagnoses of PTSD.
I hope this helps some!
If you had DID, it would be highly unlikely for you to receive a diagnosis without having some form of trauma to report, and if you did receive a diagnosis, the diagnostician would likely be under the impression that you had been through trauma that you for whatever reason were simply unable or unwilling to report. However, OSDD-1 works a bit differently. While it’s still highly correlated with trauma, like Nopeosaurus said, what’s traumatic can be subjective, especially for children. Trauma doesn’t have to refer to abuse, neglect, witnessing a death, living in a war zone, or having an illness or disability that required frequent hospitalization or intensive care. It can also refer to bullying, living with a mentally or physically ill caretaker or a caretaker who is otherwise rendered unable to provide a stable environment for the child, watching a family member or close friend survive trauma, surviving natural disasters, being threatened with parental abandonment, or struggling with an early onset mental illness. While trauma has to be repeated and relatively severe for DID to form, OSDD-1 can form as the result of “less severe” or short-term traumas because it doesn’t require the same dissociative barriers to be formed and reinforced for diagnosis. Additionally, what an adult versus a child consider more or less severe can vary considerably. OSDD-1 can form slightly later in life, as well.
All that said, while it is highly likely that you survived some form of trauma, what that trauma actually is might not be anything that you would recognize as particularly significant or “enough” now. This is true whether your condition could more accurately be labeled DID or OSDD-1.
-Katherine of Those Interrupted