Mum has VasD for more than 7 years, now immobile, bed bound, unresponsive, doubly incontinent, no speech etc. About a year ago she started continual hand wringing and rubbing her fingers; this progressed to bouts of hand clapping or clapping her hands on chair arms, books etc anything within reach. Has now progressed to whacking her own head with her flat hand - often quite hard. If I try to hold her hands to gently restrain her I can feel the jerking tremor running through them. It's not continually happening, more spasmodic - maybe every few minutes or so. At first I thought it might be caused by anxiety, but now I wonder if it might be that her damaged brain is sending out strange signals making her do this. Has anyone else experienced this? It doesn't seem to fit LBD or Parkinsons symptoms.