Hi Charlie,

It is possible that these patients have essential tremor too. This comparision was done with a selection of patients who were diagonized Parkinson's disease by a neurologist.

I'll try to place part of the table here. Could be that the layout will be bad.
134 respondents had a quivering tongue and 492 dit not experience that symptom.

Joop

Images of Parkinson's


These data are acquired from an internet survey. The respondants are a select group and do not represent the population of Parkinson patients

Comparing patients with and without quivering tongue quivering tongue No quivering tongue
Images of Parkinson's Selected Respondents: 134 Average and modal scores on a 1-5 scale. 134 rsp 492 rsp
Symptom avrg mod avrg mod

Does your tongue quiver? 2,63 2 1,63 1 5
Does your chin tremble often? 2,46 2 1,26 1,2 2
Do you have a diminished spatial sense (impaired proprioception) 2,96 4 0,94 2,02 1
Do you often have a tingling sensation of the hands, legs, arms o 2,7 2 0,93 1,77 1
Do you have difficulties swallowing? 2,76 3 0,9 1,86 3
Do you have a problem holding your stools 2,24 1 0,88 1,36 1
Do you often have involuntary eyelid contractions 2,33 1 0,85 1,48 2
Are you very rigid after a night’s sleep? 3,31 4 0,83 2,48 1
Arm/hand tremble right 2,79 3 0,8 1,99 2
Do you suffer from Lack of movement? (Akinesia) 2,74 2 0,79 1,95 3
Is your skin often oily (greasy)? 2,42 1 0,78 1,64 2
Cramps arm/hand right 2,37 1 0,78 1,59 2
Is it sometimes hard for you to stay awake? 3,02 4 0,76 2,26 3
Cramps toes right 2,54 1 0,76 1,78 2
Could your general condition be called rigid? 3,09 3 0,76 2,33 1
Do you often choke? 2,5 2 0,75 1,75 3
Do you have any difficulty keeping your head steady? 2,1 1 0,75 1,35 2
Do you have trouble chewing? 2,11 2 0,75 1,36 1