Learn to Direct Your Dreams by Jessica Hamzelou Newscientist / June 15, 2010

archived as http://www.stealthskater.com/Documents/Lucid_12.doc (.pdf) more of the Lucid Dreaming at http://www.stealthskater.com/Science.htm#Lucid note: because important websites are frequently "here today but gone tomorrow", the following was archived from http://www.newscientist.com/article/mg20627640.900-want-to-find-your-mind- learn-to-direct-your-dreams.html on December 29, 2009. This is NOT an attempt to divert readers from the aforementioned web-site. Indeed, the reader should only read this back-up copy if the updated original cannot be found at the original author's site. Want to find your Mind? Learn to direct your Dreams by Jessica Hamzelou NewScientist / June 15, 2010 Editorial http://www.newscientist.com/article/mg20627642.200-wake-up-dreaming-to-explore- consciousness.html The study of Lucid Dreaming has been seen as a fringe activity for too long. The little research that has been done suggests lucid dreamers' brains are in a penumbral state between waking and sleeping, offering all kinds of opportunities for study. Some now believe it could be possible to induce lucid dreams at will. Doing so would offer more than the chance to enjoy fantastical adventures. Harnessing lucid dreams could provide insights into consciousness (see "The secret of Consciousness: Re-interpreting Dreams"). As with any advance into a twilight zone, there will be concerns. A lucid dreamer might lose their ability to distinguish between the dream world and reality, for example. It is right to be cautious. But let's not lose sight of the opportunities. Some believe that confronting our demons in lucid dreams could help us overcome phobias. Others see the research leading to therapies for schizophrenia. There are even suggestions that practicing a motor task in a lucid dream (such as dancing or playing an instrument) can hone skills in the waking World. By harnessing our night-time dreams, we may be able to realize our waking ones more easily. "Am I awake or am I dreaming?" I ask myself for probably the hundredth time. I am fully awake, just like all the other times I asked. And to be honest, I am beginning to feel a bit silly. All week, I have been performing this "reality check" in the hope that it will become so ingrained in my mind that I will start asking it in my dreams too. If I succeed, I will have a lucid dream -- a thrilling state of consciousness somewhere between waking and sleeping in which unlike conventional dreams you are aware that you are dreaming and able to control your actions. Once you have figured this out, the dream world is theoretically your oyster and you can act out your fantasies to your heart's content. 1 Journalistic interest notwithstanding, I am pursuing lucid dreaming for entertainment. To some neuroscientists, however, the phenomenon is of profound interest and they are using lucid dreamers to explore some of the weirder aspects of the brain's behavior during the dream state (see "Dream Mysteries"). Their results are even shedding light on the way our brains produce our rich and complex conscious experience. It's a central issue in the study of Consciousness. In 1992, Gerald Edelman at the Scripps Research Institute in La Jolla, California proposed that there are 2 possible states of consciousness which he called primary and secondary consciousness. Primary consciousness is the simple subjective experience of sensory perception and emotions, which could be applied to most animals. It's a state of "just being, feeling, floating" according to Ursula Voss at the University of Frankfurt in Germany. The mental life of your common or "garden" human, however, is a lot more complicated. That's because we are "aware of being aware". This allows us to reflect upon ourselves and our feelings and, in an ideal world, make insightful decisions and judgments. This state -- dubbed "secondary consciousness" -- is thought to be unique to humans. "When you're awake, you have both primary and secondary consciousness. Secondary consciousness is that reflective awareness that determines a great part of waking consciousness," says Voss. Pinning down how our brain produces these two, subjective, states of consciousness is a tough challenge because it's difficult to isolate the different aspects of consciousness in fully awake subjects from other neural processes unrelated to awareness. Which is where dreams come in. When we dream, we experience events (albeit imagined) and emotions. But, crucially, we lack certain aspects of self-awareness that we normally feel when we are awake, particularly those involved in the rational reflection on what we are experiencing. You could easily see an outrageous event -- a fluorescent pink kitten flying past on golden wings, to name but one -- without batting a dream eyelid. "If we can accept really weird and bizarre events as perfectly normal happenings, that means there's something wrong with our reflective, rational consciousness," says Patrick McNamara of Boston University. For this reason, some researchers like Allan Hobson at Harvard Medical School believe that dreams are akin to Edelman's definition of primary consciousness. Comparing the dream state with the waking state could let us explore the way the brain generates the self-awareness of secondary consciousness. Some headway had already been made in this direction by the late 1990s. In 1997, Eric Nofzinger and his colleagues at the University of Pittsburgh, Pennsylvania compared the brain activity of awake individuals with dreamers using PET scans which reveal how much energy parts of the brain are using. The team identified 3 main regions that showed more activity during dream sleep which is characterized by rapid eye movement (REM). The areas were along the midline of the brain, the insula and the left amygdala. Together, these regions are thought to be involved in motivation and reward mechanisms and processing emotions, which Nofzinger reckons might explain why dreams are often so emotional. 2 Surprisingly, given the irrationality of the dream experience, many of the frontal areas of the brain involved in advanced cognition such as reasoning and forward planning were also active in the dreamers. But there was one notable exception: the dorsolateral prefrontal cortex (DLPFC) was remarkably subdued in REM sleep, compared with during wakefulness. To Hobson, that strongly suggests that this particular area -- above other frontal regions -- is crucial for the critical reflective awareness present in waking, and therefore secondary, consciousness (Trends in Cognitive Sciences, vol 6, p 475). Could this one brain region alone explain our secondary consciousness? It's here that lucid dreams enter the picture. With their increased self-awareness, lucid dreams share certain aspects of secondary consciousness. So researchers are now vying to observe what happens in the brain when someone "wakes up" within their dream and whether they exhibit any further signatures of consciousness. "It's a very interesting leap because it can show you exactly what occurs if you jump from limited consciousness to very high consciousness," says Victor Spoormaker of the Max Planck Institute of Psychiatry, Munich, Germany. "This should be one of the main themes of lucid dream research." Lucidity on demand Voss and her colleagues made tentative steps towards using lucid dreams to study consciousness in 2009. She trained a group of students to become lucid dreamers using a number of tips and tricks (see "Lessons in Lucidity"). Once they had "woken up" within their dream, the subjects were then asked to signal to Voss that they were lucid by moving their eyes in a previously agreed pattern, which was measured with an electro-oculograph. "We have no other way of knowing they're really in a lucid dream," says Voss. "It's a great effort to make these eye movements because normally you're in that dream and you're busy with other things; you don't want to communicate with the outside world." At the same time, Voss used EEG (i.e., a cap of electrodes placed on the scalp) to record their brain activity. Unfortunately, the team only managed to capture 3 lucid dreams -- an indication of just how tricky they are to study. But it was enough to reveal a couple of intriguing differences between the lucid and non-lucid dreaming brain that may contribute to the secondary state of consciousness. Firstly, the team observed an increase in a specific brainwave -- oscillating at 40 hertz -- in the frontal regions during the lucid dreams compared to the non-lucid dreams which tended to have slower brainwaves. They also found greater synchronized activity between the frontal and parietal regions of the brain than in normal REM sleep, though less than would be expected in a fully awake subject (Sleep, vol 32, p 1191). Importantly, the overall brain activity was still significantly different to the waking state. Meaning that the subjects couldn't have been awake and simply pretending to lucid dream (see diagram). 3 What was the DLPFC up to? If it really were key to the self-awareness of secondary consciousness, you would expect it to "light up" during the lucid dreaming state. Unfortunately, EEG is not sensitive enough to measure the neural activity in such a small, specific area. However, preliminary work by Michael Czisch at the Max Planck Institute of Psychiatry in Munich, Germany hints at the answer. He used high-resolution fMRI scans to investigate the brain state of lucid dreamers. Although the results are currently being peer-reviewed (so many of the details are still "under wraps"), Czisch has hinted that the scans again reveal highly coordinated activity in the frontal regions of the brain, and also in the parietal and temporal zones, once the dreamers became lucid.

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