Wearable can control Tourette symptoms

  • March 21, 2023
  • Steve Rogerson

A wrist-wearable device can help control the symptoms of Tourette Syndrome, significantly reducing the severity and frequency of tics, according to a clinical trial.

The prototype wrist device delivers electrical pulses to reduce the amount and severity of tics experienced by individuals with Tourette’s and was trialled by 121 people across the UK. The results were announced in MedRxive.

The device was developed by scientists at the UK’s University of Nottingham and spin-out company Neurotherapuetics, which has recently secured £1m in additional funding to commercialise the Neupulse device with the aim of having a device and app available within the next three years.

Tourette Syndrome (TS) is a neurodevelopmental condition that is usually diagnosed between the ages of eight and twelve. It causes involuntary sounds and movements called tics. Tics are repetitive, stereotyped movements and vocalisations that occur in bouts, typically many times in a single day, and are often preceded by a strong urge-to-tic, referred to as a premonitory urge (PU).

Previous research by scientists from the University of Nottingham’s School of Psychology and School of Medicine used repetitive trains of electrical stimulation to the median nerve (MNS) at the wrist to entrain rhythmic electrical brain activity – known as brain oscillations – associated with the suppression of movements. They found rhythmic MNS reduces tic frequency and tic intensity, and removes the urge to tic, in individuals with TS.

Trial participants used the device at home at a similar time each day for 15min for one month. Some people were also videoed each day. Each week, participants gave feedback on their experience.

The results of the trial revealed that people who received active stimulation experienced a significant reduction in the severity and frequency of their tics. On average, they saw a reduction in tic frequency of more than 25% while they received stimulation.

After using the device for four weeks, people who received active stimulation experienced a reduction in their tic severity of more than 35%. In total, 59% of the people who received active stimulation experienced a reduction in tic severity of at least 25% compared with the baseline.

Mylo, aged 13, was one of the participants in the trial. His parents noticed unusual symptoms when he was a toddler, but he wasn’t diagnosed until he was ten after his tics became more noticeable.

“The device was easy to use,” said Mylo. “You strap it on like a watch and press a button to start it. You have to make sure the pads are on the back properly otherwise it might hurt a tiny bit. When the stimulation occurs, it feels a bit like a fizzing on my wrist and forearm, not painful just a bit different.”

Mylo said the device definitely helped his tics.

“I still did the occasional tic when it was on but the need to do it was a lot less,” he said. “I definitely want this device when it is available. I think it can help people with Tourette’s in different ways. For me, I would use it if I was going to the cinema or the theatre – places where you sometimes have to be quiet or still so you don’t disturb people. Tourette’s can be really exhausting sometimes, like when you have a tic attack and can’t get a break from it. This device could really help with that. I think different people would benefit in different ways, because Tourette’s can vary quite a lot. I don’t think I would use it all day, just when I felt I especially needed it.”

Mylo’s mum Alex added: “I feel this device could be a great safety net for us. I don’t know how Mylo’s Tourette’s will progress as he gets older, but knowing there is something out there that can help if he wants it makes me feel so much better. I would also say that the device might not be for everyone. If you are accepting of your tics and they don’t impact your life you might not want or need it, but for those people that really struggle I believe it will make a significant impact with daily challenges. We feel really lucky to have taken part in the trial.”

Stephen Jackson from the University of Nottingham and chief scientific officer at Neurotherapeutics said: “Though the Neupulse device is still early in development, the results of this UK-wide double-blind clinical trial have been extremely encouraging. This device has the potential to dramatically improve the lives of those with Tourette Syndrome, who often face challenges managing their tics, by providing increased control over their tics on demand.”

Barbara Morera Maiquez, chief research officer at Neurotherapeutics, managed the trial.

“The results of this trial mark an exciting step towards an effective, non-invasive treatment for Tourette Syndrome that can be used at home,” she said. “We are now focused on using the knowledge from the trial to develop a commercial device that can be made available to people with Tourette’s.”

Emma McNally, chief executive officer of Tourettes Action, added: “The results of the trial are extremely promising. Many with Tourette’s suffer with pain caused by the repetitive nature of their tics and often find it hard to get any respite from this. The device could provide them with a useful self-managing treatment to help them better manage and control their tics, ultimately giving them a break from the tic pain cycle. It could potentially improve the lives of so many people.”