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Where available, ICD-10 codes are listed. When codes are available both as a sign/symptom (R code) and as an underlying condition, the code for the sign is used. When there is no symptoms for a disease that a patient has, the patient is said to be asymptomatic.
In neurology, retrograde amnesia (RA) is the inability to access memories or information from before an injury or disease occurred. [1] RA differs from a similar condition called anterograde amnesia (AA), which is the inability to form new memories following injury or disease onset. [ 2 ]
This is a shortened version of the sixteenth chapter of the ICD-9: Symptoms, Signs and Ill-defined Conditions. It covers ICD codes 780 to 799. The full chapter can be found on pages 455 to 471 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1.
This characteristic of TGA, where the length of time affected by retrograde amnesia shortens (i.e. older memories return first, followed by more recent memories) is commonly seen. [4] In the majority of cases there are no long-term effects other than a complete lack of recall for this period of the attack and an hour or two before its onset.
Unlike retrograde amnesia (which is popularly referred to simply as "amnesia", the state where someone forgets events before brain damage), dissociative amnesia is not due to the direct physiological effects of a substance (e.g., a drug of abuse, a medication, DSM-IV codes 291.1 & 292.83) or a neurological or other general medical condition (e ...
There are two main types of amnesia: Retrograde amnesia is the inability to remember information that was acquired before a particular date, usually the date of an accident or operation. [3] In some cases, the memory loss can extend back decades, while in other cases, people may lose only a few months of memory.
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The most prominent symptom of post-traumatic amnesia (PTA) is a loss of memory of the present time. [10] As a result, patients are often unaware of their condition and may behave as if they are going about their regular lives. This can cause complications if patients are confined to a hospital and may lead to agitation, distress and anxiety. [10]