Abstract : Anxiety disorders affect a significant portion of the global population, with lifetime prevalence rates estimated at 33.7% (Bandelow & Michaelis, 2015) which is an alarming figure for appeal for proper assistance. Nowadays, neurofeedback offers a complementary and alternative approach that may benefit those who have not found anxiety relief through conventional methods. Despite promising results, the field of neurofeedback for anxiety disorders requires more rigorous scientific investigation. Therefore, this study addresses methodological limitations of previous research by employing a larger sample size and utilizing QEEG analysis for a more comprehensive assessment of neural changes. 40 individuals diagnosed with anxiety disorders were recruited for the study. The main criterion was a primary diagnosis of an anxiety disorder, in the age range of 18-65 years. While the vast majority of neurofeedback research is focused on frontal areas, the role of posterior regions in anxiety disorders is less understood. So, there is a prospect that this study’s emphasis on posterior brain activity may provide new insights into the neural mechanisms of anxiety and potential targets for intervention. At the stage of statistical analysis of results, the paired samples t-test was used to determine whether the difference of means was statistically significant. Eventually, the observed increase in alpha power of the occipital and parietal regions was confirmed by the result of the t-test (t (39) = 4.82, p < .01, d = 4.33). By revealing the relationship between QEEG patterns and treatment outcomes, this research contributes to the development of more personalized and targeted neurofeedback protocols for anxiety disorders.