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Researchers have investigated the relationship between posttraumatic amnesia (PTA) resulting from traumatic brain injury (TBI) and the development of symptoms of posttraumatic stress disorder (PTSD) and acute stress disorder (ASD). 282 outpatients, who were an average of 53 days post-TBI in their recovery, were divided into four groups: PTA ...
TGA is the sudden onset of AA and RA caused by a traumatic event, however it is short lived, typically lasting only 4 to 8 hours [51] TGA is very difficult to study because of the patients' quick recovery. [52] This form of amnesia, like AA, remains distinct from RA. [13]
Post-traumatic amnesia is generally due to a head injury. Traumatic amnesia is often transient, but may be permanent or either anterograde, retrograde, or mixed type. The extent of the period covered by the amnesia is related to the degree of injury and may give an indication of the prognosis for recovery of other functions.
The Westmead Post-traumatic Amnesia Scale (WPTAS) is a brief bedside standardised test that measures length of post-traumatic amnesia (PTA) in people with traumatic brain injury. It consists of twelve questions that assess orientation to person, place and time, and ability to consistently retain new information from one day to another.
The DSM-IV lists criteria for diagnosis of PCD in people who have had a head trauma with persistent post-traumatic amnesia, loss of consciousness, or post-traumatic seizures. [33] In addition, for a diagnosis of PCD, patients must have neuropsychological impairment as well as at least three of the symptoms marked with a check mark in the table ...
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Post-traumatic amnesia is also common with brain damage, as is temporary aphasia, or impairment of language. [17] As time progresses, and the severity of injury becomes clear, there are further responses that may become apparent.
A second cause is a traumatic brain injury in which damage is usually done to the hippocampus or surrounding cortices. It may also be caused by PTSD, a shocking event, or an emotional disorder. [5] Illness, though much rarer, can also cause anterograde amnesia if it causes encephalitis, which is the inflammation