Alzheimer’s disease remains one of the hardest conditions to treat, with most therapies offering only modest benefit. In this episode, I explore a fascinating new study published in Brain Communications that investigates whether ultrasound (sound beyond human hearing) can safely change brain activity in people with Alzheimer’s disease.

I break down what focused ultrasound is, why it’s different from drug-based treatments, what the researchers found in humans, and why subtle changes in behaviour and brain dynamics may matter more than headline cognitive scores. This episode highlights sound as not just something we perceive but as a tool to actively shape the brain.