Bioccipital rhythm refers to the electrical activity in the brain that occurs in the occipital lobes when the eyes are closed. This rhythm is also known as alpha rhythm, Berger's rhythm, or occipital alpha. Alpha rhythm is a well-known phenomenon in the field of neuroscience, and it has been extensively studied in the context of visual perception, attention, and consciousness. Other synonyms for bioccipital or alpha rhythm include posterior alpha, occipital theta, and occipital beta. While each of these terms may have slightly different connotations depending on the specific research context, they all refer to the electrical oscillations that occur in the posterior region of the brain.