Friday, April 19, 2013

measuring consciousness?


thescientist | General anesthesia has transformed surgery from a ghastly ordeal to a procedure in which the patient feels no pain. Despite its widespread use, however, little is known about how anesthesia produces loss of consciousness—a blind spot brought into sharp focus by the fact that patients still occasionally wake up during surgery. But over the past 5 years, researchers have made significant progress in understanding what happens in the brain as consciousness departs and returns.

Peering into the anesthetized brain with neuroimaging and electroencephalograph (EEG) recordings, scientists have found evidence to support the “integrated-information theory,” which holds that consciousness relies on communication between different brain areas, and fades as that communication breaks down. EEG studies have also revealed distinctive brain wave patterns that signal when consciousness is lost and regained, offering easily identifiable markers for this impairment of communication.

Though many questions remain, advances in brain activity monitoring promise to shed light the neural basis of consciousness, and to eradicate the nightmare of mid-surgery awakenings. What’s more, by combining EEGs with magnetic brain stimulation, researchers may be able to measure consciousness and track recovery in unresponsive patients diagnosed as “vegetative,” who in recent years have been shown to sometimes have higher levels of consciousness than previously realized.

1 comments:

Anonymous said...

Just wish to say your article is as amazing. The clearness in your post is simply nice and i can assume you are an
expert on this subject. Fine with your permission allow me
to grab your feed to keep updated with forthcoming post.

Thanks a million and please carry on the gratifying work.

Also visit my web blog: Auto Click PTC Sites

Oppressed Victim Supremacist Suffering Unhappy Wife Equals Unhappy Life Syndrome

twitter  |   Over my 35-year career, I have been the subject of many thousands of articles, including extremely negative, inaccurate, and l...