Having Gamma Knife for tremor and I keep thinking, how do I hold STILL in the frame when my hands shake all day?

I've had essential tremor for years, tried two different tablets, one made me so tired I fell asleep at my desk. My neurologist has now put me forward for Gamma Knife on the thalamus for my right hand (I'm right handed, so it's the one that matters). Date probably September.

Here is the thing nobody has quite answered for me. I shake. Not a little, my hand jumps around when I try to do anything. So how on earth am I supposed to keep still for the frame and the scan? I have this picture in my head of ruining the whole thing by twitching at the wrong moment and them zapping the wrong spot. It's keeping me up.

Also, slightly embarrassed to ask, but does this actually stop the shaking on the day or do I walk out still rattling? Everyone keeps saying "one session" like it's instant and I'm not sure I believe it.

Diane I had the frame in June for trigeminal neuralgia so not tremor, but I can tell you about the still part because that was my exact fear too.

Once the frame is pinned on, your head genuinely cannot move. It is bolted to the couch. That is the whole point of it and it feels very solid, almost reassuring once you're in it. So whatever your hands are doing, your head is locked. I actually dozed off during the treatment itself, which tells you how much staying still was NOT a struggle.

Acoustic neuroma here, frame last November. Same as Gwen. The head is fixed, that's non negotiable once it's on, and honestly the machine works to the frame not to your body. Your hands can do whatever they like on your lap under a blanket.

Can't speak to the tremor result though, mine was a tumour. Curious to hear what the mods say about the "walk out cured" bit because I don't think that's how any of this works.

Thank you both, the bolted down thing helps a lot actually, I had it in my head I'd have to consciously hold my head still the whole time.

Follow up question then. If it's not instant, when DOES it kick in? And are they doing both hands or just the right? My left shakes too, less, but it's there.

A few clinical points, because there are two separate worries tangled together here and they pull apart neatly.

First, the stillness. The frame is fixed rigidly to the skull and then to the treatment couch, so the target in the thalamus does not move regardless of what your hands are doing. A tremor of the limbs simply does not translate to the head once the frame is on. The accuracy of the treatment comes from the frame and the imaging, not from you holding a position, so a shaking hand cannot pull the dose off target. This is one of the reasons radiosurgery is sometimes chosen for people who would struggle to lie still and cooperative for a long awake procedure.

Second, and more important to be honest about: Gamma Knife thalamotomy is not instant. It works through a latency, a delay of weeks to months while the tissue responds, and many people notice the tremor easing somewhere around 3 to 6 months, occasionally closer to a year. You will not walk out steady on the day, and a hand that still shakes that afternoon is expected, not a sign of failure. The site's write-up on Gamma Knife thalamotomy for essential tremor sets out the timeline and the numbers.

On the two hands: treatment is almost always to one side only, aimed at the dominant hand, because lesioning both sides of the thalamus raises the risk to speech and balance. That the left is milder is common, and whether the second side is ever considered later is a decision your own team would take cautiously and only after seeing how the first side settled. Take that question to your neurologist directly, since it turns on your specific findings.

Not a tremor patient but wanted to say the latency thing tripped me up too after mine, I kept checking for a change that was never going to show up that fast. Knowing it comes slowly beforehand would have saved me a fortnight of staring at my own hand. Good luck in September Diane, come back and tell us how the frame morning went.