My husband started the sleep twitching, talking, and occasional night terrors a few years before his diagnosis. We were told he has REM sleep disorder. It does not allow him to go into a deep sleep. He fights day time fatigue. Also has made it difficult for us sleeping together. No more snuggling. Constant movement keeps me awake. 50% of people with REM develop dementia.

My husband does all the movements and talking all night too We have given a sleeping pill at night which most nights prevent him from getting up and wanting out The movements are still there but he does sleep through them 🙏

Tremors...could also be Lewy Body. My husband has tremors. After he was finally diagnosed with Lewy Body He was put on Sinemet (a Parkinson’s medication). People with Parkinson’s also have Lewy bodies in their brains. Sinemet has helped his tremors greatly.
Be sure to tell the doctor about the tremors.
Unfortunately Lewy Body is majorly unidentified.

Twitching and jumping may be little mini seizures (myoclonic) or the preface to them. When your brain pathways don’t function normally the electrical signals go haywire causing seizures. In my sister’s case they eventually led to full tonic-clinic(whole brain, whole body) seizures. (We used to call them grand mal.) These in turn became more frequent and led to medicating with Keppra. Keppra has been shown to most effective in AD patients. The Keppra reversed things for a year and improved her thinking. I was thrilled. The brain pathway deterioration progresses over time with Alzheimer’s and the jumps & jerks of mini myoclonic seizures led to the return of tonic-clinic. When Keppra dosage was at max over time, Depakote was added and seizures have been reduced again. I highly recommend and encourage you to talk to your doctor and proactively discuss the jumps and jerks. Ativan is often prescribed as a sleep med for AD. Ativan is the first drug given to patients usually in emergency situations with seizures to curb the seizures quickly. It might be that when Ativan is used to help sleep, it is curbing the electrical disturbances that cause seizures. Don’t think the jerks and jumping can’t be addressed to improve quality of living because AD progression seems unstoppable. 🧐