TLNS for ataxia
Ataxia is what happens when movement stops being accurate. People walk with their feet wide apart, drift sideways, miss the cup they reach for, cannot stand with their feet together, and become far worse in the dark or with their eyes shut. From the outside it often looks like drunkenness, which many patients end up having to explain to strangers. Below: where ataxia comes from, what is usually done about it, and where translingual neurostimulation fits.
Three kinds of ataxia, and why the difference matters
Cerebellar ataxia. The cerebellum or its pathways are damaged — after stroke, traumatic brain injury, posterior fossa surgery, in multiple sclerosis or degenerative disease. Typical signs: a wide-based unsteady gait, overshooting when reaching, tremor at the end of a movement, scanning speech. Closing the eyes makes things moderately worse.
Vestibular ataxia. The vestibular organ or the vestibulocochlear nerve is damaged — after removal of an acoustic neuroma, in vestibular neuritis, Ménière's disease, or after toxic damage to the labyrinth, for example from aminoglycoside antibiotics. Unsteadiness comes with vertigo, nausea and a sense of falling through the floor.
Sensory ataxia. The brain stops receiving position information from muscles and joints — in polyneuropathy or damage to the dorsal columns. The giveaway: the person copes with their eyes open and loses stability sharply in the dark.
The distinction is not academic. It determines which exercises make sense and what can reasonably be expected from a course.
Why TLNS may help in ataxia
In translingual neurostimulation, weak pulses are delivered to the front surface of the tongue and travel through fibres of the trigeminal and facial nerves to the brainstem. There, side by side, lie the nuclei of those nerves and the vestibulocochlear nuclei, which have extensive connections with the cerebellum, the medial longitudinal fasciculus and the spinal cord. The reticular formation of the pons appears to be the link between them. From there the signal ascends along proprioceptive pathways to the postcentral gyrus and the superior parietal lobule — the cortical areas responsible for the sense of where the body is in space.
Put simply: we do not repair the damaged structure. For the duration of the session we amplify the flow of signal into the systems that govern balance, and at the same time give the person a task that demands balance. The brain gets a reinforced training trial — and gradually reorganises on its own. That is neuroplasticity.
What the evidence shows
Ataxia after vestibular schwannoma removal. 64 patients, Polenov Russian Research Institute of Neurosurgery together with RehaLine, 10 sessions. Among those who started within the first month after surgery, standing ataxia fell from 2.5 to 1.2 points, gait ataxia from 2.4 to 1.3, and the Karnofsky score rose from 66.9 to 74.4 (p<0.001). Details on the acoustic neuroma page.
Severe ataxia after stroke. In a randomised controlled pilot trial (Galea M. P. et al., Brain Stimulation, 2017), the group receiving cranial nerve non-invasive neuromodulation recovered gait and balance faster and more completely than the comparison group.
Children after medulloblastoma surgery. Harbourne R. et al. (Pediatric Physical Therapy, 2014) reported statistically significant improvement in balance function in children five years after surgery.
Peripheral and central vestibular loss. Danilov Y. P., Tyler M., Skinner K., Hogle R., Bach-y-Rita P. (Journal of Vestibular Research, 2007) — improved balance and gait after a course of training with electrotactile vestibular substitution.
None of this means the method works for everyone. Samples are small and several studies are pilots. But the direction is confirmed by independent groups and across different diagnoses.
What a course looks like
A standard course is 10 sessions of 20 minutes, one per day. Stimulation always runs together with an exercise: the patient stands on an unstable cushion, usually with eyes closed and feet together, so that the visual crutch is removed and the internal balance systems have to work. With severe ataxia the first sessions are done seated and the stance is narrowed gradually. The sensation on the tongue is light tingling, similar to sparkling water.
The device on its own does very little. What works is the pairing of stimulation with exercise — that is how the method was studied and how it is used.
What the method does not do
It does not remove the cause of ataxia: it does not cure multiple sclerosis, does not regrow a resected nerve, does not halt inherited cerebellar degeneration. In hereditary ataxias such as Friedreich's ataxia, the realistic goal is maintaining function and quality of life, and promising more than that would be dishonest. The method also does not replace physiotherapy, neurological care or medication — it is added to them.
Contraindications
- implanted cardiac pacemaker or any other electrical stimulator;
- epilepsy, seizure disorder;
- reduced level of consciousness;
- acute inflammation or damage to the tongue and oral mucosa;
- pregnancy.
Where to start
Write to us and describe the situation briefly: the diagnosis, how long ago it began, what has already been tried, and whether you have reports or discharge summaries. We will tell you whether a course is indicated and what can reasonably be expected in your case. A full description of the method is on the translingual neurostimulation page.