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July 1960

Observations on Human Subjects Living in a "Slow Rotation Room" for Periods of Two Days

Arch Neurol. 1960;3(1):55-73. doi:10.1001/archneur.1960.00450010055006

This report describes a new stressful procedure and the constellation of symptoms manifested by persons subjected to this stress. The procedure consists essentially of carrying out activities in a slowly rotating room. The symptoms most nearly resemble those observed in motion sickness,4,15,22 but certain similarities are also seen when comparison is made with the symptomatology in vasodepressor states,5,21 in anxiety and depressive states, in sleep, and, indeed, in various disturbances characterized by psychosomatic symptoms.20 Inasmuch as the symptoms are the direct or indirect result of stimulation of the semicircular canals, the most precise term covering the general symptomatology is probably "canal sickness."8 Although the procedure is specifically applicable to studies of the function of the semicircular canals, it has additional usefulness as a means of investigating certain aspects of the brain stem-activating system.3,6,10,11,14,17 The extraordinary flexibility of the procedure in terms of both the strength

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