Brain Waves and Beta Buzz: The Wild Story of Neural Oscillations

What are brain waves?  It’s no wonder the term sounds like science fiction.  In the 1920s, a German psychiatrist embarked on a highly personal quest to discover the supposed medium of telepathy.  By placing electrodes on the human scalp, Hans Berger found waves of electrical brain activity using a tool called electroencephalography, or EEG.  Physicists had recently shown that electromagnetic waves could propagate through space to carry information.  If the brain had its own waves, could they transmit thoughts to others like a radio broadcast?Continue reading

Intracranial EEG and Mental Time Travel

A familiar progression of chords blares out of your speakers as the red lights of the surrounding traffic fade into the memory of a dark stage illuminated by pulsing neon lights.  You replace your current discomfort (horrendous traffic!) with the memory of the last concert you attended – reliving the percussive sensory experience and feeling the intensity of the vibrating sound waves.  As you bust out the occasional air guitar move and tap out the beat on your dashboard, you are successfully retrieving a memory and reinstating a specific pattern of neural activity.  This mental time travel enables you to escape the confinement of your surrounding environment and plunge into the memory of enjoyable past experiences.Continue reading