Thursday, December 07, 2017 1:00 am
Brain abnormalities found in Cuba victims
WASHINGTON – Doctors treating the U.S. embassy victims of suspected attacks in Cuba have discovered brain abnormalities as they search for clues to explain hearing, vision, balance and memory damage, The Associated Press has learned.
It's the most specific finding to date about physical damage, showing that whatever it was that harmed the Americans, it led to perceptible changes in their brains. The finding is also one of several factors fueling growing skepticism that some kind of sonic weapon was involved.
Medical testing has revealed the embassy workers developed changes in the white matter tracts that let different parts of the brain communicate, several U.S. officials said, describing a growing consensus held by university and government physicians researching the attacks. White matter acts like information highways between brain cells.
Loud, mysterious sounds followed by hearing loss and ear-ringing had led investigators to suspect “sonic attacks.” But officials are now carefully avoiding that term. The sounds may have been the byproduct of something else that caused damage, said three U.S. officials briefed on the investigation. They weren't authorized to discuss it publicly and demanded anonymity.
Physicians, FBI investigators and U.S. intelligence agencies have spent months trying to piece together the puzzle in Havana, where the U.S. says 24 U.S. government officials and spouses fell ill starting last year in homes and later in some hotels.
Secretary of State Rex Tillerson said Wednesday he's “convinced these were targeted attacks,” but the U.S. doesn't know who's behind them. A few Canadian Embassy staffers also got sick.
Doctors still don't know how victims ended up with the white matter changes, nor how exactly those changes might relate to their symptoms. U.S. officials wouldn't say whether the changes were found in all 24 patients.
But acoustic waves have never been shown to alter the brain's white matter tracts, said Elisa Konofagou, a biomedical engineering professor at Columbia University who is not involved in the government's investigation.
“I would be very surprised,” Konofagou said, adding that ultrasound in the brain is used frequently in modern medicine. “We never see white matter tract problems.”
Physicians are treating the symptoms like a new, never-seen-before illness. They're developing the first protocols to screen cases and identify the best treatments – even as the FBI investigation struggles to identify a culprit, method and motive.
Most patients have fully recovered, some after rehabilitation and other treatment, officials said. About one-quarter had symptoms that persisted for long periods or remain to this day.