Essential tremor: Is the word "essential" really essential?

Area of Science:

• Neurology
• Movement Disorders

Background:

• Essential tremor (ET) is a common movement disorder with increasing research into its causes and characteristics.
• Recent advancements have raised questions about the accuracy and appropriateness of the term "essential tremor".

Purpose of the Study:

• To re-evaluate the historical basis and current validity of the term "essential tremor" in light of new scientific understanding.
• To discuss the pros and cons of eliminating the word "essential" from the nomenclature.

Main Methods:

• Historical review of the term "essential tremor" and its etymological roots.
• Analysis of current research on ET etiology, pathogenesis, and clinical features.
• Discussion of the implications of retaining or removing the term "essential".

Main Results:

• The term "essential" historically implied idiopathic origin and a single-featured trait, both of which are now challenged by research.
• Studies suggest ET is neither truly idiopathic nor a single isolated feature, making the current nomenclature technically inaccurate.
• Both eliminating and retaining the term "essential" present distinct advantages and disadvantages.

Conclusions:

• While the term "essential tremor" is technically inaccurate based on current knowledge, it is recommended to retain it due to the lack of a flawless alternative.
• Maintaining the historical nomenclature respects the long-standing tradition of naming this movement disorder.