Utilisation of wavelet entropy on EEG as an assistive tool to detect ischemic damage in brain

Focal cerebral ischemia, a neurological condition characterized by restricted blood supply to a specific area of the brain, presents a significant challenge in terms of diagnosis and treatment. Wavelet entropies are applied to assess ischemic damage in the frontoparietal, occipital, and temporal lobes of male Foster rats subjected to induced ischemia and treated with the piroxicam drug. Experimental findings highlight the high sensitivity of Shannon entropy in detecting ischemic damage in the brain, particularly at the eighth scale. Shannon and Rényi entropies exhibit high sensitivity in identifying ischemic damage across theta and alpha EEG bands in the three lobes, as well as in the frontoparietal and occipital lobes across the beta EEG band during both ischemic and recovery stages. However, Shannon entropy fails to identify ischemic damage in the frontoparietal and temporal lobes across the delta EEG band. Shannon and Rényi entropies have the potential to serve as supplementary tools for physicians in identifying ischemic damage in the brain, providing valuable insights that could enhance diagnostic and treatment strategies for ischemic patients.