Periodic limb movement disorder

I have no such experience, but I can think of why the limb movements happen. It is, to me, an indication of restlessness and underlying anxiety that keeps you from entering successive stages of sleep. IOW, you are stressed and your system is 'aroused' sufficiently, even while attempting to sleep, that your unconscious mind is just hanging onto sleep with its bared teeth. Also, if your heart is stressed with low blood supply, it feels different in some people and that can be a signal to your sympathetic nervous system to keep you alert, anxious, aroused, wanting to enter into full-blown fight-or-flight response...including strange dreams and thrashing limbs.
That is to say that your body is doing precisely what it thinks it needs to do to save you, even while you're in bed and asleep. Meaning 'perfectly natural and understandable'.

I don’t want to disagree with you, but my neurologist informed me that RLS is caused by a neurological disorder, not psychological.

Ask for a Mayo referral to see a sleep specialist.
I was diagnosed with PLMD over one year ago from the Mayo Sleep Specialist, after a number of neurologists said I had Restless Leg Syndrome, known as RLS. I have been living with the PLMD symptoms for over 35 years, with many medications prescribed to no avail.
The medication I use is buprenorphine, and I take at night the smallest dose, about .25 mg. The opiate comes in a 2 mg tablet, easily breakable. It has been lifesaver! I am totally against drugs, but when you cannot sleep, or stay awake for hours, I was willing to take a try. You need to see a dentist, as it promotes tooth decay, due to the tablet sits behind your tongue to dissolve, with brushing your teeth, 30 minutes later. I do go into he dentist fro regular checkups, and as of last month, no cavities.
Good luck to you, and I hope my comment helped.

I have no such experience, but I can think of why the limb movements happen. It is, to me, an indication of restlessness and underlying anxiety that keeps you from entering successive stages of sleep. IOW, you are stressed and your system is 'aroused' sufficiently, even while attempting to sleep, that your unconscious mind is just hanging onto sleep with its bared teeth. Also, if your heart is stressed with low blood supply, it feels different in some people and that can be a signal to your sympathetic nervous system to keep you alert, anxious, aroused, wanting to enter into full-blown fight-or-flight response...including strange dreams and thrashing limbs.
That is to say that your body is doing precisely what it thinks it needs to do to save you, even while you're in bed and asleep. Meaning 'perfectly natural and understandable'.

I don’t want to disagree with you, but my neurologist informed me that RLS is caused by a neurological disorder, not psychological.

I've had PLMD for many years. Tried about a dozen different meds, some with really bad side effects. The only one that consistently works is Clonazepam. Small 2 mg. dose, before bed has been very successful for me. Docs don't like to prescribe, as it's highly addictive, & long term use may cause organ problems. I've been using for over 30 years, & have not had to deal with any probs. Clonazepam is used for anxiety & seizure disorders--PLMD is a seizure disorder. Good luck!

It can have several causes, from sleep apnea to pathogen activity to drug withdrawal. Some research suggests dopamine may be at play, or rather a paucity of it. I was offering that if one cannot put one's mind at rest, and in the absence of other causal diagnoses, this is a possibility.