April 20, 2006

Gamma waves and meditation

Filed under: cogsci, meditation, brain, magnetism, consciousness - alexei @ 8:46 am

Depending on what we are thinking, how hard we are concentrating, our brain chemistry, environment, and a number of other factors, our brains have a certain electromagnetic signature, a wave frequency, which we can measure with available technology, namely electroencephalographs (EEG). Traditionally, these continuous rhythmic sinusoidal EEG waves were classified into four types: delta, theta, alpha and beta waves. Delta had a frequency range up to 4 Hz, associated with infants and children. Theta ranged from 4-8 Hz, and was linked with adolescence, trance and the preconscious state just before waking. Alpha (Berger’s) waves, 8-12 HZ, were tied to relaxed, alert consciousness. While, Beta waves, 12 Hz and above, were related to anxious thinking and active concentration. However, as increasing evidence for higher frequency brain activity came to light, Gamma waves lay claim the 26-80 Hz range, known euphemistically as “coherent 40 Hz oscillations.” These waves seem to go together with higher mental processes, perception and consciousness, making them the brain waves you probably want to have.

Gamma waves do not result from axonal-dendritic synapses, but rather from dentro-dendritic gap junctions that form after a synapse activation that links neurons together. Neurons connected by gap junctions have one common membrane, fire simultaneously and generally behave like a single giant neuron. These mega-neurons have membranes that depolarize coherently and can spread across different parts of the cortex (potentially allowing for brain-wide states). Normally, these networks are transient, as gap junctions form and dissolve constantly. But, recent research showing that practiced meditators like Tibetan monks can muscle 25-42 Hz easy, with some pushing 80-120 Hz, suggests that it is possible to keep the gap junctions open longer.

The relation between meditation and high wave frequency is not surprising, since the middle frequency (12-16 Hz), the sensorimotor rhythm, goes together with physical stillness. Just sitting still for a while is already half-way to Gamma. From there on, it almost seems it is just a matter of how much of your brain you have under control. Heightened consciousness, known as Samadhi in the meditation traditions, is an experience unclouded by cognitive contents. One usually arrives at it gradually, after years of practice, disciplining the mind that delights in distraction, learning how to focus all attention on a single thing. To focus completely on a single thing means to be able to let go of everything else. So, once you can do that, you can rid yourself from all undesired cognitive contents and enjoy a pure unmediated experience of reality. Now, if the Gamma wave frequency goes up as more of the brain is connected through gap junctions, it seems that advanced practitioners are simply able to network more of their brains, having trained to concentrate their minds. The benefits of meditation do not all wear off, advanced practitioners have a higher baseline gamma synchrony, suggesting a higher general awareness, concentration and consciousness. Other research has shown that meditation also thickens grey matter in parts of the cortex where it normally gets thinner with age. 

Breakthrough study on EEG of meditation, Stuart Hameroff MD, Director, Center for Consciousness Studies, U. of Arizona-Tucson

March 17, 2006

Tufts’ gravity stone

Filed under: magnetism - Administrator @ 4:54 am

April 26, 2005

Ghost detectors for sale

Filed under: tech, magnetism - alexei @ 8:06 pm

Japanese company SolidAlliance has released its GhostRadar, a portable ghost detector/USB memory drive that can detect electromagnetic fields, as well as sense body heat.The company even has a forum on its website where people can report their parapsychological findings. For those who like an alternative, there is an old-school electromagnetic field meter available from Trifield for $179.

Electromagnetic fields have been known to alter perception by affecting the brain. People in areas with high EM concentrations sometimes experience hallucinations or have eerie feelings that go away when they leave the place. This has led some parapsychologists to propose that these fields may be ghosts or some other spirits, in turn sending them on ghosthunts for hotspots of EM activity in search of evidence. Now you can be a ghosthunter too. Who you gonna call?

GhostRadar, SolidAlliance.
TriField Natural EM Meter, TriField

February 25, 2005

Morphic resonance

Filed under: magnetism - alexei @ 5:21 pm

Morphic Resonance. The Hypothesis of Formative Causation states that the forms of self-organizing systems are shaped by morphic fields. Morphic fields organize atoms, molecules, crystals, organelles, cells, tissues, organs, organisms, societies, ecosystems, planetary systems, solar systems, galaxies. In other words, they organize systems at all levels of complexity, and are the basis for the wholeness that we observe in nature, which is more than the sum of the parts.

According to the Hypothesis of Formative Causation, morphic fields also contain an inherent memory given by the process of morphic resonance, whereby each kind of thing has a collective memory. For example, crystals of a given kind are influenced by all past crystals of that kind, date palms by past date palms, giraffes by past giraffes, etc. In the human realm this is similar to Jung’s theory of the collective unconscious.

In the realm of developmental biology the morphic fields that shape the growing organisms are called morphogenetic fields; in social organization they can be called social fields; and the organization of mental activity they can be called mental fields. But all these kinds of fields are particular kinds of morphic fields, and all are shaped and stabilized by morphic resonance. For a fuller description of the Hypothesis of Formative Causation see Sheldrake’s A New Science of Life or The Presence of the Past.

sheldrake.org

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