Figure 1.
EEG power in tinnitus patients for narrow band noise tinnitus patients, pure tone tinnitus patients and control subjects, averaged over all electrodes.
Figure 2.
Electrode comparison of power spectra for narrow band noise tinnitus patients, pure tone tinnitus patients and control subjects.
Figure 3.
sLORETA contrast analysis between Narrow-Band-Noise versus Pure Tone tinnitus (p<.05).
Decreased activity within Delta (1–3.5 Hz; Top Panel) in the prefrontal cortex (BA10), and increased activity within Beta (25–30 Hz; Middle Panel) and Gamma (30.5–45 Hz; Bottom Panel) in respectively posterior cingulate cortex (PCC; BA23) and the right parahippocampal area (BA35) for patients presenting with bilateral narrow band tinnitus in comparison to bilateral pure tone tinnitus.
Figure 4.
sLORETA contrast analysis between Narrow-Band-Noise tinnitus patients versus Control subjects (p<.05).
Increased activity within Beta (25–30 Hz; Top Panel) in the posterior cingulate cortex (PCC; BA31) and Gamma (30.5–45 Hz; Bottom Panel) in the right and left parahippocampal areas (BA35) for bilateral narrow band tinnitus in comparison to controls.
Figure 5.
sLORETA contrast analysis between Pure Tone tinnitus patients versus Control subjects (p<.05).
Increased activity within Beta (25–30 Hz; Top Panel) and Gamma (30.5–45 Hz; Bottom Panel) in the posterior cingulate cortex (PCC; BA31) for patients with bilateral pure tone tinnitus in comparison to controls.
Table 1.
Region of interest analyses for gamma band frequency (log-transformed current density).
Table 2.
Mean and standard deviation scores on tinnitus duration, VAS intensity, VAS distress, HADS anxiety and HADS depression for pure tone and narrow band noise tinnitus patients.