Tremor

INDEX

Tremor may be classified by two main axes1:

Axis I Clinical Features:

Reviewed in the following six subsections:

2.1.1 Activating Condition    

2.1.2 Anatomic distribution

2.1.3 Frequency

2.1.4 Amplitude

2.1.5 Regularity

2.1.6 Combination with other movement disorders

Axis 2 Aetiology:

Tremor can also be viewed as isolated, or combined, when present together with other movement disorders.  In the case of tremor presenting in combination with other features, key abnormalities to identify include the presence of dystonia (in the affected limb or distant body part), bradykinesia, and cerebellar features with or without cognitive and/or gait impairment.

The various clinical features of tremor may be used to define a clinical syndrome.

 

References

1. Bhatia KP, Bain P, Bajaj N, et al. Consensus Statement on the classification of tremors. from the task force on tremor of the International Parkinson and Movement Disorder Society. Mov Disord. 2018;33(1):75-87. 

2. Hopfner F, Helmich RC. The etiology of essential tremor: Genes versus environment. Park Relat Disord. 2018;46:S92-S96. doi:10.1016/j.parkreldis.2017.07.014