Table 6.

Neurophysiological criteria for ET (Gironell et al., 2004).

Neurophysiological criteria for ET
1. Rhythmic burst of postural tremor on EMG
2. Tremor frequency ≥4 Hz
3. Absence of rest tremor, or, if present, frequency 1.5 Hz lower than the postural tremor
4. Absence of tremor latency from rest to postural position (>2 s)
5. Changes of the dominant frequency peak ≤1 Hz after the weight load test
6. No changes in tremor amplitude after mental concentration