I am currently having weekly aromatherapy to see if it helps alleviate muscle stiffness and promote relaxation. I have had two sessions sofar.The essential oils being used are Clary, Lavendar and Elangilan.I am looking to share information about this therapy particularly on the oils which have found to be effective. Here's a curious thing which has happened at both sessions.Massage of the inside of the right foremarm produced an instantaneous and very severe trembling of the whole of the LEFT arm. As soon as the massage in this area was stopped the trembling stopped.Normally I have few problems with tremor but all my PD syptoms are left side.Probably there is some simple explanation which somebody with knowledge of the nervous system could supply? David Langridge