Analysis of Quantitative Electroencephalogram Characteristics in Patients with Persistent Posture-Perceived Dizziness

Introduction. To analyze the characteristics of quantitative electroencephalogram (QEEG) in patients with persistent posture-perceived dizziness, explore the pathophysiological mechanism of PPPD, and try to find quantitative electroencephalogram related parameters applied to PPPD patients. Methods. Twenty-five patients with dizziness from June 2022 to December 2022 were selected, and healthy people who visited the physical examination center during the same period were selected as the control group. The EEG information of the two groups was collected, and the quantitative EEG indexes including the relative energy value of each frequency band and the ratio of fast to slow were obtained by fast Fourier transform. Results. Compared with the control group, the PPPD group had higher relative energy values in F4, C4, P4α frequency band, lower relative energy values in C3, P3, T5α frequency band, lower relative energy values in C3, T3, T4α2 frequency band, higher relative energy values in F8β frequency band, higher relative energy values in FP2, F4, F8β1 frequency band, and higher energy values in P4, T5θ frequency band. The fast/slow ratio of C4 and P4 decreased. Conclusions. Quantitative EEG analysis suggests the possible role of anxiety, excessive vigilance of vestibular and balance systems, and persistent high visual dependence in the pathogenesis of PPPD.