I noticed several posts relating to a feeling of internal
tremor recently.
I thought this
research paper might throw some light on the subject.
"Tremor in patients with Parkinson's disease.
Shulman LM, Singer C, Bean JA, Weiner WJ
Department of Neurology, University of Miami School of Medicine, Florida
33136, USA.
Although sensory symptoms were not originally described in
Parkinson's disease (PD), in recent years it has been increasingly recognised
that painful sensations and paraesthesia occur in approximately 40% of patients.
It has been our observation that PD patients often describe a sensation of
internal tremor, a feeling of tremor inside the chest, abdomen, arms, or legs
that cannot be seen. We investigated the prevalence and characteristics of
internal tremor by administering a questionnaire to 100 consecutive patients
with PD and 50 age-matched controls seen in our movement disorders centre. A
sensation of internal tremor was present in 44% of this sample of PD patients
and in 6% of the control population (p < 0.0001). The presence of internal
tremor was unrelated to Unified Parkinson's Disease Rating Scale score, Hoehn
and Yahr stage, duration of disease, or the presence of observable tremor. The
frequency of other sensory symptoms (aching, tingling, burning) was higher in
the PD patients with internal tremor (73%) than in those without (45%; p =
0.005). Internal tremor is associated with anxiety in 64% of patients (p <
0.0001). It was described as uncomfortable and was unrelieved by
antiparkinsonian medication in three quarters of patients. A sensation of
internal tremor is commonly reported by PD patients and should be recognised as
a useful diagnostic factor in PD."
Jim