THE "LATENCY period" is the time which elapses from the end of the thermic (caloric) stimulation of the ear up to the start of the tonic vestibular reflexes, as nystagmus, deviation reaction, and arm tonus reaction.1 This period is, according to my experiences, of importance and help diagnostically. Other physicians share this view. On the other hand, Jongkees2 doubts its value but measures it in every case with the stop watch. Arslan3 denies the latency period any significance for the semeiology of the vestibular apparatus. He does so chiefly for the reason that the length of the latency period is not dependent on changes in the peripheral vestibular apparatus but rather on anatomic factors, as the extension of pneumatization of the osseus antrum bridge, and, in a less degree, on the speed of the blood stream, as proved by Schmaltz4 and Dohlman.5
Arslan uses the
WODAK E. DIAGNOSTIC VALUE OF THE LATENCY PERIOD AFTER CALORIC STIMULATION OF VESTIBULAR APPARATUS. AMA Arch Otolaryngol. 1952;55(3):381–386. doi:10.1001/archotol.1952.00710010391009
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