Across the centuries, many a person has uttered the phrase “There must be a full moon out there” in an attempt to explain weird happenings at night. Indeed, the Roman goddess of the moon bore a name that remains familiar to us today: Luna, prefix of the word “lunatic.” Greek philosopher Aristotle and Roman historian Pliny the Elder suggested that the brain was the “moistest” organ in the body and thereby most susceptible to the pernicious influences of the moon, which triggers the tides. Belief in the “lunar lunacy effect,” or “Transylvania effect,” as it is sometimes called, persisted in Europe through the Middle Ages, when humans were widely reputed to transmogrify into werewolves or vampires during a full moon.
People say, "Oh they acted crazy, the Moon pulls the tides, the tides are made of water, the human body is mostly water, the Moon must affect the human body." (...) You can ask the question, what is the tidal force of the Moon on your cranium? (...) Because if that were severe, it could be messing with you, right? So you do the calculation, and it turns out, if you were one of these people who sleep with a lot of pillows, and one of the pillows is kind of leaning on your head overnight, the pressure from that pillow on your head is a trillion times greater than the tidal force of the Moon across your cranium. But nobody talks about the effects of down pillows on your behavior the next day.
The moon and madness reconsidered. J Affect Disord. 1999 Apr;53(1):99-106. Belief that the full moon is associated with psychiatric disturbance persists despite 50 years research showing no association. This article traces the historical roots of belief in the power of the moon to cause disorders the mind, especially insanity and epilepsy. Putative mechanisms of lunar action are critiqued. It is proposed that modern findings showing lack of lunar effect can be reconciled with pre-modern beliefs in the moon's power through a mechanism of sleep deprivation. Prior to the advent of modern lighting the moon was a significant source of nocturnal illumination that affected sleep-wake cycle, tending to cause sleep deprivation around the time of full moon. This partial sleep deprivation would have been sufficient to induce mania/hypomania in susceptible bipolar patients and seizures in patients with seizure disorders. The advent of modern lighting attenuated this lunar effect, especially in modern urban areas, where most 20th century studies of lunar effects on the mind have been conducted. The hypothesis presented in this article is open to empirical validation or falsification. Potential tests for the sleep-deprivation hypothesis of lunar action are discussed.
Originally posted by watchitburn
I think it is unlikely that the moon has anything to do with it. I grew up hearing old wives tales about the moon and behavior, but I have not observed any type of correlation.