Essential tremor (ET) is a neurological disorder characterized by shaking of hands (and sometimes other parts of the body including the head), evoked by intentional movements. The exact incidence is unknown, but it is presumed to be the most common type of tremor and also the most commonly observed movement disorder.[1] Essential tremor was also previously known as "benign essential tremor", but the adjective "benign" has been removed in recognition of the sometimes disabling nature of the disorder.
Essential tremor (ET) is a progressive neurological disease whose most recognizable feature is a tremor of the arms that is apparent during voluntary movements such as eating and writing.[1] This type of tremor is often referred to as "kinetic tremor". The tremor may also occur in the head (neck), jaw and voice as well as other body regions, with the general pattern being that the tremor begins in the arms and then spreads to these other regions in selected patients. Women are more likely to develop the head tremor than are men.[2][3] Other types of tremor may also occur, including postural tremor of the outstretched arms, intentional tremor of the arms and rest tremor in the arms.[4] Some patients may have unsteadiness and problems with gait and balance that are above and beyond that due to normal aging.[5] [6] In addition to these motor problems, a variety of non-motor features have recently been linked with ET. These include anxiety and depressive symptoms as well as cognitive difficulty. [7] Recent studies have demonstrated that ET may be associated with an increased risk of developing dementia [8]. ET is one of the most common neurological diseases, with a prevalence of approximately 4% in persons aged 40 and older and considerably higher among persons in their 60s, 70s, 80s, and 90s. [9][10] Aside from enhanced physiological tremor, it is the most common type of tremor and also one of the most commonly observed movement disorders.[11] Essential tremor was also previously known as "benign essential tremor", but the adjective "benign" has been removed in recognition of the sometimes disabling nature of the disorder. Although often mild, patients with severe tremor have difficulty performing many of their routine activities of daily living.[12][13]
Last update: 2008-05-06 13:32:11 Essential Tremor | Copyright 2008 HubHip.com