Tremor magnitude: A single index to assess writing and drawing in essential tremor

Ulmanová, Olga; Homann, Carl Nikolaus; Ulman, Radek; Jech, Robert; Čapek, Václav; Klempíř, Jiří; Růžička, Evžen

doi:10.1016/j.parkreldis.2006.04.010

Cited by 11 publications

(12 citation statements)

References 6 publications

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“…Since one of the recruitment criteria of our study was to recruit healthy individuals without neurological impairments and who did not take medications that may increase or decrease tremor, we could not get enough subjects for the group G7 during the period of the research. [13][14][15]17,[23][24][25]28,33,35,36 Task Definition…”

Section: Criteria For Recruitment Of Subjects and Definition Of Groupsmentioning

confidence: 99%

“…However, some alterations and aggravations can amplify tremor making it visible, like stress situations, anxiety, muscular fatigue, and the use of certain drugs. 5,32 Most studies found in literature are related to the analysis of pathological tremor, 1,8,10,12,13,15,17,20,24,28,30,35 highlighting the lack of investigations aiming to understand the complex relation between physiological tremor and aging, specifically in kinetic conditions. 11,23,25,29,33 The most common methods for measuring tremor are through the analysis of accelerometry and electromyography.…”

Section: Introductionmentioning

confidence: 99%

“…10,11,25,29,33,34 Another common method to analyze it is by means of the study of handdrawing movements. 12,13,15,17,24,28,30,35 This kind of analysis makes possible the study of the kinetic tremor, which occurs during voluntary movement.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, the selected drawing pattern is the spiral of Archimedes as it is the gold-standard in neurological assessments. [11][12][13]15,17,20,24,30,35 Several attributes of the spiral of Archimedes make its use attractive in tests for the detection of human tremor. First, it has a simple design and it is easily understood by subjects who can follow its trajectory.…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14][15]17,20,24,30,35 However, even with the advances in the technology of digitizing tablets, which allowed for more precision and accuracy in the measurement of movements, no study focusing upon the use of these devices, as a tool for investigating the relation between physiological tremor and aging in kinetic conditions, was found in our literature survey. Although some authors, e.g., Wenzelburger et al, 36 support the hypothesis that kinetic tremor is related to an enhancement of physiological tremor this assumption is not consensual 11,29,33 and therefore additional studies in this area are required.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Age-Related Changes in Physiological Kinetic Tremor

et al. 2010

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Tremor is the most common movement disorder characterized by repetitive and stereotyped movements. Most investigations on tremor attempt to understand its relation to neuromuscular dysfunctions. Therefore, there is a lack of studies that aim to investigate the complex relation between the physiological tremor and aging, especially in kinetic conditions. In this context, the main motivation of this research was to quantify age-related changes in the kinetic tremor of clinically healthy individuals. For this, a number of features extracted from tremor activity, obtained from digitized drawings of Archimedes' spirals, were analyzed. In total, 59 subjects participated in the experiments. These individuals were divided into seven groups according to their ages and two types of analysis were carried out. First, the tremor activity of young and elderly adults was investigated by means of traditional features commonly used in tremor analysis, and secondly, linear discriminant analysis (LDA) was employed for the study of the correlation between age and tremor. The results showed significant statistical differences between the kinetic tremor activity of the young and elderly groups. Furthermore, it was found that LDA allowed for the estimate of a unique feature, so-called LDA-value, which showed to be linearly correlated with age.

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Section: Criteria For Recruitment Of Subjects and Definition Of Groupsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of Age-Related Changes in Physiological Kinetic Tremor

et al. 2010

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Estimating Disability in Patients with Essential Tremor: Comparison of Tremor Rating Scale, Spiral Drawing, and Accelerometric Tremor Power

Hollý,

Hubená,

Čihák

et al. 2024

Movement Disord Clin Pract

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BackgroundAlthough performance rating scales, spiral drawing, water pouring, and accelerometry are commonly used to assess tremor severity, the extent to which their results correlate with impairment in activities of daily living (ADL) remains unclear.ObjectiveThe aim was to identify the most effective predictors of ADL in essential tremor (ET).MethodsForty ET patients were examined using The Essential Tremor Rating Assessment Scale (TETRAS), spiral drawing, volume of water spilled, and accelerometric tremor power. Root‐mean‐square error, R2, and F‐test were calculated for models predicting TETRAS ADL subscore.ResultsTETRAS Performance Subscale explained the variability in TETRAS ADL with an R2 value of 0.686. Models incorporating spiral rating and accelerometric tremor power (R2 = 0.731) and water spillage volume (R2 = 0.756) were not statistically superior.ConclusionsTETRAS performance subscore predicted nearly 70% ADL impairment in ET patients. Incorporating the spiral rating, accelerometric tremor power, and water pouring test did not enhance ADL estimation.

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