Do you routinely recommend a sleep study in patients with clinical history of REM-sleep behavior disorder?

I do routinely recommend and perform in lab sleep testing for patients with suspected REM behavior disorder (RBD). The finding of REM sleep without atonia (RSWA) is supportive of a diagnosis of RBD, as atonia is normally presented in individuals (without RBD) during REM sleep.

RBD can be a tricky di...