Deep-brainStimulation
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Brain pacemakers show promise in Alzheimer's trials, might open new treatment possibilities
Deep-brain electrical stimulation has been around for a while -- rousing folks from comas and helping researchers find new ways to treat OCD, depression and maybe even obesity. Now doctors are testing the so-called "brain pacemakers," on Alzheimer's patients and the results are promising, but not conclusive. After a year of treatment, six patients showed higher glucose consumption in PET scans of the learning and memory areas of the brain -- a change that is associated with increased neuron activity. Glucose metabolism typically decrease as a result of the disease. Researchers are seeking more patients for the trial, and are optimistic that the technique could one day be used to stave off some of Alzheimer's debilitating symptoms.
Deep-brain electrical stimulation brings man out of vegetative state
A 38-year-old man who had been in a near-coma for six years was recently awakened via the use of a pacemaker and two electrodes which were deeply implanted in his brain. The electrical device, manufactured by a company called Medtronic, was used to send impulses to the area of the brain regulating consciousness, and researchers believe that the stimulation may be enhancing brain circuits that are still capable of functioning. The man, the first of 12 to undergo the procedure, has gone from a vegetative state to being able to play cards, speak with family members, and take trips outside. While this isn't exactly a new technology -- as doctors have been experimenting with deep-brain stimulation in the treatment of Parkinson's, epilepsy, and brain injuries for some time -- it is a clear sign that there's hope for patients whom the medical community has been, heretofore, unable to treat.
