Amnesia transitoria: síndromes

ACNR
Advances in Clinical Neuroscience and Rehabilitation

Síndromes de amnesia transitoria
Butler C. & Zeman A. ACNR 2006; 6 (4): 13-14

• Transient Global Amnesia (TGA)
• Transient Epileptic Amnesia (TEA)
• Closed Head Injury
• Transient Ischaemic Attacks (TIA)
• Psychogenic Amnesia

"For most of us, transient lapses of memory are a familiar and at worst irritating feature of daily life. They are generally brief, item specific and alleviated by a pertinent cue.At the other extreme,the amnesic syndrome is characterised by a profound and usually permanent loss of the ability both to retrieve previously established memories (retrograde amnesia) and to form new ones (anterograde amnesia). A permanent amnesic syndrome is usually caused by extensive bilateral damage to the medial temporal lobes (as in limbic encephalitis or post-hypoxic damage) or to the diencephalon (as in Korsakoff’s syndrome), brain regions which play a key role in declarative,‘conscious’ memory for facts and events.

Some people, however, experience an episode of dense memory loss which is sudden in onset but self limiting. These syndromes of transient amnesia are the focus of this article."

http://www.acnr.co.uk/SO06/SO06_review_syndrome.pdf

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Mi Amnesia

CLAVES PARA EL DIAGNOSTICO:

• Duración menor de 1 hora, recurrentes: sospecha de amnesia epiléptica transitoria
• Duración de 2-24 horas, sin focalidad, con la conciencia y el razonamiento conservados: sospecha de amnesia global transitoria
• Duración mayor de 24 horas: sospecha de AVC
• Con síntomas del circuito posterior (vértigo, diplopia, etc): sospecha de AIT posterior
• Precedido de aura con sensación de dèjá vu: sospecha de crisis parcial compleja
• En joven, con estrés, con pérdida de identidad (autobiográfico): sospecha de amnesia psicogénica o "fuga"