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Malaria: Amnesia.

Case 129. (De Brun, November, 1917.)

A soldier lost all memory of his hospital stay in Salonica and the voyage home. He could only remember a little about the hospital at Bandol. There is a period of transition to full memory in malarial cases characterized by sure memory, vague on certain points, alternating with phases of almost complete amnesia. The soldier in question had very inexact memories of the Bandol Hospital, and could only remember about his fevers, that they began about noon and terminated about four o’clock. Twice he had been found in his shirt, walking, unconscious, in the passageway of the hospital. Having obtained leave for convalescence, three months after his memory gap began, he went to Paris, and probably had attacks at home. He vaguely remembered afterward being carried by automobile to the Pasteur Hospital, December 1. There he remained to the end of March, 1917, without preserving anything but the vaguest memories of an intermediary period of more than six months. The memory in these malarial cases often remains permanently altered and there may even be a retrograde amnesia, carrying back to facts prior to the gap and an anterograde amnesia relative to facts after the main gap.

Thus, there is in the febrile period a retrograde amnesia and in the post-febrile period a retrograde or anterograde amnesia. One group of subjects are severe cerebral cases, and the memory gap appears to run back to a period of true mental confusion. But there is another group of patients who preserve throughout the febrile period an absolute consciousness of all acts, and yet the memory gap is just as sharp and definite as in the confusional cases.