Amnesia, Retrograde

**Definition:** Loss of the ability to recall information that had been previously encoded in memory prior to a specified or approximate point in time. This process may be organic or psychogenic in origin. Organic forms may be associated with CRANIOCEREBRAL TRAUMA; CEREBROVASCULAR ACCIDENTS; SEIZURES; DEMENTIA; and a wide variety of other conditions that impair cerebral function. (From Adams et al., Principles of Neurology, 6th ed, pp426-9)

**Tree numbers:** - C10.597.606.525.100.150 - C23.888.592.604.529.100.150 - F01.700.625.100.150 - F03.615.200.150

**Synonyms:** - Retrograde Amnesia