Involuntary Movements In The Evening ,before Going To Bed.Using The

Involuntary movements in the evening ,before going to bed.Using the Bipap machine which seems to help.
Sleeps with machine on ,wakes in the AM and seems fine until the evening and starts again. Sleep doctor say he doesn't think It is connected to sleep suggests seeing neurologist. Movements involve whole body and are very strong.He is alert and aware as it is happening.