AC motors can operate without any moving electrical contacts and without first converting alternating current — delivered by the power company — to direct current. Tesla patented 20 ...

Mild electrical brain stimulation did not further improve motor recovery in stroke survivors, according to late-breaking science presented today at the American Stroke Association's International ...

Neither a placebo procedure nor two different doses of transcranial brain stimulation, which send electrical signals through the skull, improved mobility recovery in stroke survivors receiving ...