A sleeve that mitigates hand tremor, and the explainable AI that makes it possible.
HemiLogic builds wearable technology for people whose nervous systems have stopped carrying signals faithfully. Our first product is SureHand, a tremor cancellation sleeve for people whose hands shake, beginning with Parkinson's disease. It reads the signal on its way to the hand, tells the intended movement apart from the tremor, and answers the tremor with a small signal of its own. It is in development now, and it has not yet been tested in patients.
SureHand, design rendering. Two HemiSense sensors, one at the elbow and one at the wrist. Everything between them is fabric and thread.
What it does
Three things happen inside the sleeve, over and over, faster than you can notice.
Tremor is a signal problem before it is a movement problem. The brain sends the hand an instruction, and an unwanted rhythm rides along with it. The hand obeys both. SureHand works at the point where that signal passes through the forearm, which is why it can act before the hand has moved.
It listens
A sensor at the elbow reads the signal your nervous system sends to your hand, before the hand moves. It reads continuously, all day, without you doing anything.
It tells the difference
Software inside the sleeve separates the movement you meant to make from the tremor riding along with it, and predicts what the tremor will do in the next fraction of a second.
It answers back
Fine conductive thread woven into the fabric sends a small signal of its own, timed to push against the tremor, so the movement you meant comes through and the shake is opposed.
How it fits together
A brain, and a body.
Every product we make has the same two parts. One part senses and understands. The other part acts. Keeping them separate is what lets us build one brain carefully and then give it many different hands.
THE BRAIN
HemiSense Array
A set of sensors worn on the body that read the nervous system and understand what they read. On its own, with nothing attached, the array can spot a condition, follow it over time, and see where it is heading. Every conclusion it reaches can be read as a plain rule.
THE BODY
HemiAct add-ons
Devices that plug into the array and act on what it knows. SureHand is the first: it borrows the array's elbow and wrist sensors and adds the woven thread that pushes back. Others will follow, each built for a different job, all sharing the same brain.
We are building the elbow and wrist sensors and the SureHand sleeve first, because tremor is measurable, common, and poorly served. The rest of the array, and the add-ons after it, come one at a time, as the evidence allows.
Who it is for
We are starting with four conditions.
Each one is a way the nervous system stops carrying signals faithfully. Each one leaves a signature a wearable sensor can read, and each one opens a new possibility for detection, monitoring, treatment and prediction that is individual to the person wearing it. The sleeve comes first. The same brain is built to reach the rest.
Hands that shake
Parkinson's disease and essential tremor
Tremor, stiffness, slow movement, and the way symptoms rise and fall as medication wears on and off across a day.
Seizures
Epilepsy
Knowing when a seizure is happening, and the harder question underneath it, knowing one is coming before it starts.
Memory loss
Alzheimer's disease and related dementias
Catching the earliest changes, and following how they progress, in the place a person actually lives rather than a clinic visit twice a year.
Recovering from a stroke
Neurorehabilitation
Measuring recovery objectively between therapy sessions, so progress is seen and not guessed.
Find your page
Different people come here with different questions. We wrote a page for each.
Patients and families
I live with this, or someone I love does.
What we are building, in plain words. What it is not yet. How to follow along as it moves toward a first study.
Read the patient page →Clinicians and researchers
I treat these patients or study these conditions.
What the platform measures, why every output is explainable, and how to collaborate on feasibility and validation.
Read the clinician page →Investors
I back companies at this stage.
The platform thesis, where we are, what comes next, and how to request the venture overview.
Read the investor page →The facts
Where we stand.
Our vision
A clearer tomorrow for brain health.
Our mission
To build a wearable brain that reads the nervous system, a body of add-ons that act on what it reads, and to show the reasoning plainly enough that a doctor can check it.
Why fuzzy logic
Fuzzy logic turns complex signals into transparent, verifiable rules. Paired with wearables, it makes care that is individual and predictive a real prospect rather than a promise. That is the possibility we are building toward: highly advanced detection, monitoring, treatment and prediction in neurological medicine, with the reasoning open to inspection at every step.
We hold ourselves to a simple standard. If a device cannot explain why it did what it did, in words a clinician would accept in a chart note, it is not finished. Everything on this site is in development. Nothing here has been tested in patients yet. We say so on every page, because the people this is for deserve to know exactly where things stand.