So here's a start:
Alts/Alter/Part/Personality/Other/Insider - A person within a DID System.
Co-Consciousness/Co-Awareness - when two or more persons are aware of what each other they are doing (and often feeling/thinking, etc).
Co-Hosting - when more than one person is out at once.
Co-Present/Co-Presence - when two or more persons are present, but not really aware of each other, or, not able to communicate with each other.
Inside - the internal world.
Integration - when two (or more) alters become one.
Multiple - a person who has more than one personality living within their body.
Out/Fronting - At the front/hosting/in control of the body (or anything else).
Singleton - the term used for someone who is one-mind, one-body, and pretty much one-personality in their body. Anyone without others. A "normal" person. Sometimes referred to as people with Single Personality Disorder.
Split - Dissociated to the level of "creating" (for lack of a better word) another personality
Sub-System - Usually a specific group of people inside, often Sub-Systems are separated in ways from each other.
Switch - to change from one person inside to another.
Switchy - the state of feeling like we are about to or could switch.
System - Usually considered to be the Collective term for everyone inside. (Some people can have multiple Systems, and will often refer to them as Sub-Systems)
T - therapist
Trigger (sometimes written as **trigger warning** or TW) - a warning to other people that the content of a post may contain things that will trigger a response such as a flashback, panic or other type of stress. Used across many different mental illness & abuse discussions, not just DID.
Some types of alters
Core/Original - usually is considered to be the person who was first in the body. This is sometimes, but not always, the Host/Fronter/Main.
Fragment - an aspect of a personality that has not yet developed, and may never develop, into a full identity - but nonethess displays traits seperate from other personalities and can often act independently. Often holds a single memory, or handles a single emotion, or does a specific task.
Gatekeeper - an alter who can control who is out and in.
Host/Fronter/Main - basically, the one who generally handles things, the one who is "out" mostly.
Introject - an alter who was split off to represent an outside person.
ISH - stands for Internal Self-Helper - they are typically leaders of the system and often they know what’s going on in the system, what’s best for the system, and work towards maintaining safety, stabilization, balance, etc. They usually stay inside and don't tend to front very often.
Littles - the younger alters in a System.
Otherkin - an alter who is not human (animals, fairies, non-physical beings, etc). Borrowed from people who do not identify as human.
Opposite gender - not necessarily a type, but is common. Many people with DID will have an alter (or several) who are of the opposite gender to the body.
Protectors - as implied by the name, protectors work to protect the System. Some do this by being nasty to people (if they won't be near us, they can't hurt us), others by being nasty or harmful to other alters (if they don't feel good enough, they won't be around other people, therefore we won't get hurt). Others protect by getting between the System and any danger. There are many types of protectors, most commonly Physical, Emotional, Sexual, Internal.
*Trigger: descriptions of ANPs & EPs*
Structural Dissociation
"Structural dissociation of the personality may occur in trauma, with the pre-traumatic personality fragmenting into what Myers (1940) referred to as an 'apparently normal' and an 'emotional' personality."
"The 'Emotional Personality' (EP) is directed by the defensive emotional (sub)systems in particular, and is characterized by fixation in the trauma, hypermnesia, somatosensory experiences of the trauma, retraction of the field of consciousness to the trauma and related stimuli, and disorientation to the present time."
"The 'Apparently Normal' Personality (ANP) is directed by emotional systems related to daily life, including attachment. The primary function of the ANP is to adequately function in daily life, which would not be possible if unintegrated trauma was intruding. Thus, the ANP is fixated in avoidance of the trauma, detachment, some degree of amnesia or other lack of realization, retraction of the field of consciousness to issues of daily life that excludes trauma and related stimuli, and emotional and physical numbing."
"The dissociation of a single EP and a single ANP is termed primary structural dissociation, and is found in acute stress disorder and simple PTSD. If trauma is prolonged and severe, further fragmentation occurs along defensive subsystems, resulting in two or more EPs and a single ANP. This so-called secondary structural dissociation is found in complex PTSD, trauma-related borderline personality disorder and dissociative disorder not otherwise specified. Finally, tertiary structural dissociation occurs only in DID, and includes not only fragmentation of EPs, but also fragmentation of the ANP."
"It is important to note that ANPs and EPs represent a wide range of dissociated contents, ranging from rudimentary and single states (e.g., a feeling or behavior) to much more elaborated and autonomous set of states (e.g., clearly distinguished aspects of DDNOS and DID)."
Quotes from: http://www.trauma-pages.com/a/steele-2001.php
An explanation by member (teedoc
