Researchers have been using ultrasound to control brain activity, but studies in mice and guinea pigs show it also stimulates the auditory system, presenting a confounder for direct neural stimulation.
The blood-brain barrier is a collection of specialized cells and proteins that control the movement of molecules from the blood to the central nervous system.
A study provides stronger evidence for the causal link between Zika infection and microcephaly, and warns of a host of other birth defects associated with the virus.