We've on several occassions had discussions on one sided symptoms. For some reason which has always come up in these discussions, at least 2/3 of us who get one sided symptoms get them on the left side.. Ive found this to be so at two different ME/CFS websites (so I guess something is more so going wrong in our right side of our brain seeing brain signals crosses over past the eyes).
Maybe its just pure chance that its been the left but I would like to see this studied as whenever Ive seen this subject brought up, its always more common on the left so maybe there is something to be learnt from this.
When I get one sided neuro symptoms eg leg and one foot dragging behind the other as I tried to walk, it was always on the left side.