In a patient with essential tremor, which symptom is indicative of the condition?

In essential tremor, a hallmark symptom is a high-frequency intention tremor. This type of tremor occurs during purposeful movements, such as when a patient reaches for an object or tries to perform a task. The tremor often worsens as the individual gets closer to the target, distinguishing it from other types of tremors.

Essential tremor is characterized primarily by this postural and kinetic tremor, rather than resting tremors, which are more indicative of conditions like Parkinson's disease. The high frequency associated with essential tremor can be quite noticeable and can significantly impact daily activities, particularly those requiring fine motor skills, such as writing or eating. This symptom is key in diagnosing essential tremor, as it reflects the dysfunction of the motor pathways that is central to this condition.