You might not believe it, but the idea that the brain communicates through electrical impulses is actually nothing new at all. It can be dated back as far as to the 18^th century when Luigi Galvani accidentally made a frog’s leg twitch with an external electric conductor [1]. This is a general experiment that every Biology student has probably already had their own experience with. However, it wasn’t 90 years later in 1875 that the Liverpudlian Richard Caton became the first to demonstrate the existence of electrical currents in the brain through experimenting with rabbits [2]. Although he lacked the technology to preserve his recordings, he accurately observed the dynamic nature of brain waves, noting how they varied depending on whether the animal was awake, asleep, or deceased. Unaware of Catons work, Adolf Beck published similar findings in 1890. In addition to identifying spontaneous brain wave fluctuations, Beck was the first to describe evoked potentials –  brain responses triggered by external sensory stimuli [3]. Their pioneering discoveries were further solidified when, in 1924, the German Hans Berger successfully recorded these electrical signals in living humans, earning him recognition as the father of electroencephalography (EEG) [4]. Berger also identified two distinct brain wave frequencies, which he named alpha and beta waves, correlating them with different levels of mental activity. Today, we know that the brain operates across multiple frequencies that interact with each other [5], with certain frequencies becoming more prominent depending on the brain region and the individual’s level of mental alertness [6].