Shell-explosion: Recurrent amnesia.
Case 448. (Mairet and Piéron, April, 1917.)
A shock case of Mairet and Piéron had a disorder of memory. Association paths were open one day and closed the next. Subjected to shell-shock, September 18, 1915, he was found wandering in the woods a few days later, having completely lost his memory, even for his name. In November he recovered his surname but not his given name. On stimulation he was gotten to remember his city, his father, the street, and the like. Shortly he could get back his memories more quickly; after a week it took only 35 seconds to remember that he was born at Paris. However, his recollection of the Trocadero and of the Eiffel Tower, which had come back to him in November, 1915, was lost again in April, 1916, to return once more in August. December, 1915, he could not write to dictation, but copied writing as he would a design. He suddenly felt himself able to write in the Morse code (he was a telegrapher); then ordinary writing returned. February, 1916, however, he had forgotten what the Morse code was. In April, he was taught numbers. One day he would know left from right, but had forgotten it by evening.