retrograde amnesia
Memory impairment affecting recall of information and events that occurred before the onset of brain injury or illness.
Full Definition
Retrograde amnesia refers to the loss of memory for events, information, and experiences that occurred prior to the onset of amnesia-causing brain injury or neurological condition. This type of memory loss typically follows a temporal gradient, with more recent memories being more severely affected than remote memories (Ribot's law). The extent and duration of retrograde amnesia can vary significantly depending on the underlying cause, ranging from minutes to years. Common causes include traumatic brain injury, stroke, neurodegenerative diseases, and certain medical treatments such as electroconvulsive therapy.
Usage
Usage note: Always specify temporal extent when documenting retrograde amnesia.
In Context
- "The patient demonstrated severe retrograde amnesia extending back five years before the traumatic brain injury." — Neuropsychological assessment
- "Rehabilitation focused on compensatory strategies as the retrograde amnesia showed minimal recovery." — Memory therapy plan