Parameters of the wave M in 554 patients suspected of tetanic syndrome but with negative ischemic and hyperventilation tests.

We examined 554 patients with clinical suspicion of tetanic syndrome whose ischemic and hyperventilation tests were negative. We analysed the wave M before carrying out the tests with the following parameters: latency, amplitude, duration, shape and strength of stimulus. We could register higher irritability in women, in young persons, in course of years. We cannot register conspicuous changes during year seasons; the amplitude and the strength of stimulus were in middle correlation. We try to explain the significance of the polyphasic shape of the wave M where the desynchronization and repetitive activity are supposed to be the main causes. The relation between men and women was 1:2.2. Most patients were in the middle age group.