The Hexatron: A new Thumbgonimeter

Ebskov, B; C, Boe

doi:10.3109/17453676608989403

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…Previous research studies have investigated the biomechanical properties and the functional anatomy of the TMC joint [5,7,8,12,19]. These studies and others note that the motion of the circumduction motion of the TMC joint is best modeled as a cone [9, lo].…”

Section: Discussionmentioning

confidence: 99%

A quantitative method to measure maximal workspace of the trapeziometacarpal joint??normal model development

KUO¹

2004

Journal of Orthopaedic Research

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Zntroducfiorz: A reliable and quantitative method for measuring motion of the thumb is lacking. In particular, review of the previous methods of motion analysis of the thumb joints shows that there is no objective method for clinicians to assess the impairment of the thumb trapeziometacarpal (TMC) joint. Based on the concept of the three-dimensional (3-D) space within which the first metacarpal can move relative to the trapezium (a concept of defining and measuring the workspace of the TMC motion), we present a quantitative method for measuring motion and impairment (loss of function) of the T M C joint.Mrthnd.r: Twenty normal subjects were recruited in this study. An electromagnetic device was placed over the thumb metacarpal and long finger metacarpal, the 3-D relationship between them previously established. We measured the position and orientation of the T M C motion in space. Maximum movements of the thumb T M C joint in circumduction, flexion-extension and abductionadduction were used to construct the 3-D maximal workspace of the T M C joint. Mathematical methods were used to verify the model and calculate the maximal workspace.Results: The results of this study demonstrate accurate and repeatable measurement of 3-D T M C motion with high statistical reliability and low variability of the maximal T M C workspace. A statistically significant linear correlation between the maximal surface area and the square of the first metacarpal length was obtained.Conclusion: We conclude that a quantitatively comparative measurement of the range of motion of the TMC joint can be obtained with potential to measure motion in joints affected by arthritis or trauma and measured in both dynamic and static positions of the thumb.

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Section: Discussionmentioning

confidence: 99%

A quantitative method to measure maximal workspace of the trapeziometacarpal joint??normal model development

KUO¹

2004

Journal of Orthopaedic Research

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“…Kim (1997)은 사용도구의 무게가 증가할수록 손의 최대 허용가능빈도(maximum acceptable frequency)는 감소하고 피로도는 증가한다고 보고하였다. 또한, 손과 손가락의 반 복적 사용과 과중한 작업수행은 손과 손가락의 불편감, 통 증, 수행력 감소를 유발한다 (Fontana, Neel, Claise, Ughetto, & Catilina, 2007;Ming, Pietikainen, & Hanninen, 2006;Moore, 1997 (Ebskov & Boe, 1966;Jonsson, Johnson, & Hagberg, 2007) (Gustafsson et al, 2010;Jonsson et al, 2011;Figure 3). 표면전극 부착위치와 표 준화를 위한 최대정적수축방법은 <Table 1>과 같다 (Cram & Kasman, 1997).…”

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The Effect of Smartphone Holding Techniques on Kinematic Variables and Muscle Activities in the Thumb during Tapping Numbers

Kim¹,

Chae

Jung³

et al. 2014

Korean Journal of Sport Biomechanics

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The purpose of this study was to determine whether there are significant differences in kinematic variables and muscle activities of the thumb between two smartphone holding techniques. Twelve right handed university students(age 25.4±3.9 yrs, height 176.2±5.1 cm, weight 75.8±11.4 kg, hand length 19.2±1.1 cm) who have no musculoskeletal disorder were recruited as the subjects and had experience in using a smartphone for more than one year. Maximum joint angle, angular velocity, muscular activities were determined for each trial. For each dependent variable, paired t-test was used to determine whether there were significant differences between one hand (OH) and two hands ([TH], ρ<.05). The results of this study showed that there were no significant differences between OH and TH in the maximum joint angle of the thumb. The angular velocity of each joint was not statistically significant between OH and TH. The statistical analysis revealed that the main effect of the smartphone holding conditions was significant in the peak normalized muscular activities of FDI and APL. Although smartphone holding technique doesn't affect on mobility and movement of the thumb joint, it may affect on active degree of the thumb and the upper extremity in directly and indirectly.

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The three-dimensional analysis of three thumb joints coordination in activities of daily living

Lin

Kuo

Liu

et al. 2011

Clinical Biomechanics

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The Hexatron: A new Thumbgonimeter

Cited by 6 publications

References 3 publications

A quantitative method to measure maximal workspace of the trapeziometacarpal joint??normal model development

A quantitative method to measure maximal workspace of the trapeziometacarpal joint??normal model development

The Effect of Smartphone Holding Techniques on Kinematic Variables and Muscle Activities in the Thumb during Tapping Numbers

The three-dimensional analysis of three thumb joints coordination in activities of daily living

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