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Elsa Fouragnan, Associate Professor, School of Psychology, University of Plymouth

Ultrasound waves zapped at the brain are being used to treat everything from hand tremors to addiction

Elsa Fouragnan, Author provided

One in four people has a mental disorder, according to the World Health Organization. If you’re lucky enough to live in a wealthy country, treatment will usually involve some form of medication – which can cause more issues than it fixes.

The reason for that lies in the depths and complexities of the human mind. It is made up of a maze of pathways that connect the different parts of the brain. They are in turn governed by chemicals that dictate our thoughts, emotions and actions. When a person has psychiatric disorders such as depression, anxiety or addiction, this intricate landscape is often clouded in shadow.

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