Is action tremor in Parkinson's disease related to resting tremor?

Objective: Action tremor (AT) and resting tremor (RT) have been widely cited in many studies with Parkinson's disease (PD) patients, but studies looking at the association between the two tremor types are few and show inconsistent results. This study will look at the prevalence and association...

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Bibliographic Details
Published in:Neurological research (New York) 2014-02, Vol.36 (2), p.107-111
Main Authors: Rana, Abdul Qayyum, Siddiqui, Ishraq, Mosabbir, Abdullah A., Qureshi, Abdul-Rehman M., Fattah, Abdul, Awan, Naeem
Format: Article
Language:English
Subjects:
Adult
Age Factors
Aged
Aged, 80 and over
Female
Humans
Male
Middle Aged
Movement disorders
Parkinson Disease - complications
Parkinson Disease - physiopathology
Parkinson's disease
Prevalence
Retrospective Studies
Severity of Illness Index
Sex Factors
Tremor
Tremor - epidemiology
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Summary:Objective: Action tremor (AT) and resting tremor (RT) have been widely cited in many studies with Parkinson's disease (PD) patients, but studies looking at the association between the two tremor types are few and show inconsistent results. This study will look at the prevalence and association of AT and RT in a large sample of idiopathic PD patients, and will put the results into context with the literature. Methods: A retrospective chart review analysis of 332 patients with idiopathic PD was performed. Prevalence rates of particular tremor types were noted. The presence of AT was analyzed relative to the presence and severity of RT. Results: Nearly all individuals with AT also had RT. The concurrence of the two tremor types was found to be highly significant by statistical analysis (P < 0·0001). The severity of RT, measured by its laterality, may also be of importance, albeit to a much smaller extent if at all. Neither presence of tremor nor type of tremor present was influenced by patient gender, age, or Hoehn and Yahr stage of PD. Conclusions: The results indicate that AT has extensive presence in PD. This and its seemingly close relationship to RT suggest that AT may be considered a variant of RT, particularly in PD patients. The degree of association between RT and AT needs to be further analyzed in PD, as well as in essential tremor (ET) and ET-PD.
ISSN:0161-6412
1743-1328
DOI:10.1179/1743132813Y.0000000274