3 ms·
I was in an MRI recently that gave me crazy muscle spasms in my back synchronized with the MRI pulses. It is apparently semi common to get that type of thing, b
by twobitshifter 3y ago
I was in an MRI recently that gave me crazy muscle spasms in my back synchronized with the MRI pulses. It is apparently semi common to get that type of thing, but it was unnerving to have the machine seemingly take control of my nervous system.
Anyways this was an old machine going into ‘retirement’ next week i was told. I wonder what my response would be to 11T magnet.
- xattt 3y agoWhat was the strength? I’ve had a sensation similar to a Jacksonian march in a 3T head scan.
- extraduder_ire 3y agoI've long thought it's a wonderful coincidence that there's not enough magnetic material in the average human to make MRI dangerous to the point of uselessness. Good to know what to look out for if I ever get a scan. I wonder what the mechanism that caused that was. Induced current, maybe.
- rcxdude 3y agoThere are safety limits on MRI machines (more related to how quickly the fields change as opposed to their absolute strength) so that they don't stop your heart. I'm not suprised they can have some noticable effect below that.
- toomuchtodo 3y ago> Time-varying gradient fields may induce currents in nerves and muscles, causing tingling, tapping, or twitching. Patients must be instructed to alert staff immediately when they experience such sensations. (peripheral nerve stimulation) https://www.jospt.org/doi/10.2519/jospt.2011.3906 https://www.jospt.org/doi/10.2519/jospt.2011.3906