Electroencephalography in Orthostatic Tremor: A Prospective Study of 30 Patients

Figures & Tables

Figure 1

Figure 2

Table 1

EEG Results.

SUBJECT	EEG RESULTS	ARTIFACT	TREMOR FREQUENCY ON EMG
1	Normal	15 Hz in posterior electrodes on EEG	15 Hz
2	Normal	15 Hz in occipital electrodes on EEG	No EMG
3	Normal	17.6 Hz in EKG	No EMG
4	Normal	17 Hz in inferior orbital electrode on EEG, also seen in frontal, occipital and temporal electrodes	No EMG
5	Generalized fast activity of low voltage which could be consistent with generalized medication’s effect	15.6 Hz in infraorbital electrode on EEG	15.6 Hz
6	Normal	Present in bilateral temporal regions on EEG but not able to be measured	15.5 Hz
7	Normal	Present in temporal regions on EEG but frequency did not match (exact frequency not reported)	18 Hz
8	Normal	None noted	Could not be measured
9	Normal	16.5 Hz in T3 and T5 electrodes on EEG and EKG	No EMG
10	Normal	Present in occipital regions on EEG	17 Hz
11	Normal	15 Hz in Oz electrode on EEG	No EMG
12	Normal	13.2 Hz in Oz electrode on EEG	13.2 Hz
13	Normal	15 Hz in T5 and T3 electrodes on EEG while sitting and other midline and central electrodes when standing	No EMG
14	Left anterior mid-temporal slow activity	Could not be measured	No EMG
15	Right anterior mid-temporal slow activity	18 Hz in occipital electrodes on EEG	No EMG
16	Normal	14 Hz in occipital electrodes on EEG	No EMG
17	Normal	Present in occipital electrodes but not able to be measured	15.5 Hz
18	Normal	Could not be measured	Could not be measured
19	Normal	16 Hz in Oz electrode on EEG	No EMG
20	Normal	None	15.5 Hz
21	Normal	14.5 Hz in posterior electrodes on EEG	14.5 Hz
22	Normal	16.5 Hz in Oz and O2 electrodes on EEG	16.5 Hz
23	Normal	14 Hz in infraorbital electrode on EEG	No EMG
24	Normal	18.5 Hz in EKG	No EMG
25	Normal	15.5–16 Hz in Oz, O1, O2, T5, and T6 electrodes on EEG	No EMG
26	Normal	Present in bilateral temporal, midline, and posterior head leads on EEG but could not be measured	Could not be measured
27	Normal	15.5 Hz in occipital electrodes on EEG	Could not be measured
28	Normal	16 Hz in O1, O2, Oz, and T4 electrodes on EEG	16 Hz
29	Right anterior mid-temporal slow activity	7.3 Hz in O1 and Oz electrodes on EEG	7.3 Hz
30	Normal	Present in EEG but could not be measured	15.5 Hz