consciousness

Electroencephalography (EEG) Underused Investigative Tool in Hospitals, Study Finds

A retrospective study of patients who had in-hospital electroencephalography (EEG) has established that EEG is a valuable tool that could be deployed more widely to identify treatable causes of impaired consciousness in the hospital setting.

The study is published in the April issue of the Mayo Clinic Proceedings.

Altered mental status (AMS) and paroxysmal spells of uncertain origin are common among hospitalized patients. Impaired consciousness can sometimes be linked to metabolic or cardiac causes, but some of these spells may represent seizures or non-convulsive epilepsy, which can be detected only by electroencephalography (EEG). Although EEG is the key test in making these diagnoses, it is relatively underused in the inpatient setting owing to lack of availability and neurologic consultation at many hospitals in the United States.

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Consciousness: An Emergent Property Of Mind-Brain Interaction

Consciousness: An Emergent Property Of Mind-Brain Interaction – presented by Jay Gunkelman

A model of consciousness will be illustrated with physiological data from EEG and Event related potentials. Using millisecond level time resolution, a working model of the interaction between the mind and the brain will be constructed.

The Slow Cortical Potentials generated by Glial activity and the faster gamma activity reflecting activity of bound neural networks will be used to illustrate this model. The physiological correlates of concepts like intention, attention, memory, perception, awareness, sensory differentiation and conscious awareness will all be discussed within the framework of this model. Advanced concepts like neural network binding, nested rhythms, cross-spectral correlation, and the bispectrum will be discussed.

The DC potentials cause an instantaneous phase resetting and binding of a neural network, which can initiate synchronous activity within these neural networks. Current work using this model in clinical work on severe disorders of consciousness, including work by the International Brain Research Foundation on recovery of consciousness in coma cases will be reviewed. The simplest expression of the model: when the DC potentials reflecting activity of the mind interact with gamma activity reflecting neural activity in the brain, the emergent property of this interaction is consciousness.

[youtube]http://www.youtube.com/watch?v=Pv-msnzTk7o[/youtube]

From The Society for Scientific Exploration (SSE)

Brain Power

This video was recently shown again on CBS 60 Minutes. It is a great video talking about using brain controlled interfaces.

Brain Power – Harnessing the Power of the Brain

August 9, 2009 4:35 PM

People who are completely paralyzed due to illness or trauma are getting help communicating with a new technology that connects their brains to a computer. Scott Pelley reports.

Vilayanur S. Ramachandran MD, PhD Video Collection

A collection of great videos on the brain from Vilayanur S. Ramachandran MD, PhD

The Boy with the Incredible Brain

This is the breathtaking story of Daniel Tammet. A twenty-something with extraordinary mental abilities, Daniel is one of the world’s few savants. He can do calculations to 100 decimal places in his head, and learn a language in a week. This documentary follows Daniel as he travels to America to meet the scientists who are convinced he may hold the key to unlocking similar abilities in everyone.

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