amnesia

Biogenic

Caused by brain damage or disease

Retrograde

Inability to retrieve information that was acquired before (remote memory loss)

anterograde

Inability to transfer new information from the short-term store to long term store (recent memory loss)

Psychogenic or dissociative or functional

Caused by psychological trauma or repressed memories

Generalized

Origin is rare psychological disorder, and spontaneous recovery from amnesia in a comparatively short period of time. Complete loss of identity

Localized

No memory of specific events

Selective

Can only recall only small parts of the event

Situation specific

Result of a severely stressful event as part of PTSD

Global

Cannot recall both past and present ; total memory loss. Forgetting new events as it occurs starting from a specific point in the past