A voice synthesiser powered by thought alone could one day enable severely disabled patients to converse more instinctively.

A California doctor has been indicted on federal charges for "sub-dosing" AIDS patients, or giving them less than the prescribed amounts of their medications in order to increase his profit.

Moderately elevated levels of insulin increase the levels of inflammatory markers and beta-amyloid in plasma and in cerebrospinal fluid, and these markers may contribute to Alzheimer's disease, according to a new study posted online today from Archives of Neurology, one of the JAMA/Archives journals. The study will be published in the October print edition of the journal.

International Stroke Survey An international online stroke survey has been launched to gauge the awareness of signs and symptoms of stroke, as well as differences in treatment options available in Europe, Canada and the United States. The results will be used to help improve care for stroke survivors around the world and to raise awareness of this serious, yet treatable condition. You are encouraged to take the survey.

Researchers have identified excessive gambling as a side effect of a treatment for Parkinson's disease. Some patients who are prescribed medication known as dopamine agonists developed the problem within three months of starting treatment, even though they had previously gambled only occasionally or never at all.