![]() ![]() The individual simply cannot recall anything that happened outside the last few minutes, while memory for more temporally distant events may or may not be largely intact. ![]() However, a TGA episode generally lasts no more than 2 to 8 hours before the patient returns to normal with the ability to form new memories.Ī person having an attack of TGA has almost no capacity to establish new memories, but generally appears otherwise mentally alert and lucid, possessing full knowledge of self-identity and identity of close family, and maintaining intact perceptual skills and a wide repertoire of complex learned behavior. īoth TGA and anterograde amnesia deal with disruptions of short-term memory. ![]() A person in a state of TGA exhibits no other signs of impaired cognitive functioning but recalls only the last few moments of consciousness, as well as possibly a few deeply encoded facts of the individual's past, such as their childhood, family, or home perhaps. Transient global amnesia ( TGA) is a neurological disorder whose key defining characteristic is a temporary but almost total disruption of short-term memory with a range of problems accessing older memories. Competing interests The authors, the Journal Editor H Wood and the CME questions author D Lie declared no competing interests.Medical condition Transient global amnesiaĪreas of hypoperfusion, seen above in the left sided hippocampus (seen as white punctate lesions on diffusion weighted MRI) are a characteristic finding in Transient Global AmnesiaĬlinical diagnosis, imaging may aid in diagnosis 5 Describe the most appropriate treatment for TEA. ![]() 4 Identify the most likely anatomic seizure focus of patients with TEA. 3 Recognize the types of persistent amnesia seen in patients with TEA. 2 Distinguish clinical features of TEA from transient global amnesia and psychogenic amnesia. Learning objectives Upon completion of this activity, participants should be able to: 1 Describe diagnostic criteria for transient epileptic amnesia (TEA). To receive credit, please go to and complete the post-test. All other clinicians completing this activity will be issued a certificate of participation. Physicians should only claim credit commensurate with the extent of their participation in the activity. Medscape, LLC designates this educational activity for a maximum of 0.5 AMA PRA Category 1 Credits. Medscape, LLC is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide CME for physicians. KEYWORDS epilepsy, memory, MRI, PET, transient epileptic amnesia Continuing Medical Education online Medscape, LLC is pleased to provide online continuing medical education (CME) for this journal article, allowing clinicians the opportunity to earn CME credit. Investigations Physical examination, laboratory tests, EEG, MRI brain scan, PET imaging, and neuropsychological assessment. Between amnestic episodes, the patient noticed a gradual deterioration in his recall of remote events, despite normal performance on standard memory tests. The attacks were sometimes associated with olfactory hallucinations. The attacks often occurred on waking, did not affect other cognitive abilities such as perception, language or judgment, and typically lasted about half an hour. Abstract : Background A 54-year-old man presented to a cognitive disorders clinic having experienced recurrent episodes of transient amnesia over a number of years. ![]()
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