The hand of the musician: The kinematics of the bidigital finger system with anatomical restrictions

Leijnse, J.N.A.L.; Snijders, Chris J.; Bonte, J.E.; Landsmeer, J. M. F.; Kalker, J. J.; Meulen, Jacques C. van der; Sonneveld, G. J.; Hovius, S.E.R.

doi:10.1016/0021-9290(93)90065-m

Cited by 77 publications

(38 citation statements)

References 11 publications

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“…From the anatomic point of view, this bias is not as important, since othes have emphasized the parallelism between the flexor digitorum superficialis tendon and the flexor digitorum profundus tendon. 10,37 We believe that the use of this kind of splint may contribute to the revision and alteration of rehabilitation procedures in patients suffering from a number of injuries such as deformities, capsular ligamentous injuries, tendinous injuries, and others.…”

Section: Discussionmentioning

confidence: 99%

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Silva

Mattar

Neto

et al. 2005

Clinics

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PURPOSE AND METHODS:In order to determine forces acting upon an articular joint during hand rehabilitation, a dynamic splint was built and connected to a dynamometer (capable of measuring forces in the range 0 -600 gf). Through trigonometric calculation, the authors measured the flexing force in the proximal interphalangeal joint of the middle finger at 30°, 45°, 60°, and 90° of flexion. Measurements were obtained in a population of 40 voluntary adults, 20 females and 20 males, This flexing force was correlated with age, sex, and anthropometric measures. RESULTS: Force in the flexing tendon is maximal at the start of flexion, and decreases as the angle of joint flexion increases. A relationship was observed between finger length and the magnitude of the force exerted on the tendon: the longer the finger, the greater the force exherted upon the tendon. Force is greater at all the measured angles, (except 30°) in males and in individuals of higher stature, and bigger arm span. CONCLUSIONS: The flexing force can be effectively measured at all flexing angles, that it correlates with a number of different anthropometric parameters, and that such data are likely to open the way for future studies.

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Section: Discussionmentioning

confidence: 99%

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Silva

Mattar

Neto

et al. 2005

Clinics

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“…The anatomical design of the extrinsic flexors and the presence of passive connective tissue links between fingers have been invoked as peripheral factors that potentially contribute to enslaving (Kilbreath & Gandevia, 1994;Leijnse et al, 1993). An important role of neural factors has been supported in experimental studies that showed substantial overlaps of finger projections in the primary motor cortex of primates (Schieber, 1991;Schieber & Hibbard, 1993), effects similar to enslaving observed in experiments with motor imagery (Li, Latash, & Zatsiorsky, 2004), studies of slow brain potentials (Slobounov, Johnston, Chiang, & Ray, 2002a,b), and by neural network modeling works (Goodman, Latash, Li, & Zatsiorsky, 2003;Gao et al 2003).…”

Section: Central and Peripheral Mechanisms Of Finger Inter-dependencementioning

confidence: 99%

“…Enslaving has been discussed as a consequence of both peripheral and neural factors. In particular, the presence of multi-tendon, multi-digit muscles and of passive connective tissue links between adjacent fingers can be expected to contribute to enslaving (Kilbreath & Gandevia 1994;Leijnse, Snijders, Bonte, Landsmeer, Kalker, Van Der Meulen, Sonneveld, & Hovius, 1993). In addition, projections of fingers in the primary motor cortex show substantial overlaps (Schieber & Hibbard, 1993;Schieber, 1999;Schieber & Santello, 2004) suggesting a neural contribution to enslaving.…”

Section: Introductionmentioning

confidence: 99%

Finger inter-dependence: Linking the kinetic and kinematic variables

Kim

Shim

Zatsiorsky

et al. 2008

Human Movement Science

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We studied the dependence between voluntary motion of a finger and pressing forces produced by the tips of other fingers of the hand. Subjects moved one of the fingers (task finger) of the right hand trying to follow a cyclic, ramp-like flexion-extension template at different frequencies. The other fingers (slave fingers) were restricted from moving; their flexion forces were recorded and analyzed. Index finger motion caused the smallest force production by the slave fingers. Larger forces were produced by the neighbors of the task finger; these forces showed strong modulation over the range of motion of the task finger. The enslaved forces were higher during the flexion phase of the movement cycle as compared to the extension phase. The index of enslaving expressed in N/rad was higher when the task finger moved through the more flexed postures. The dependence of enslaving on both range and direction of task finger motion poses problems for methods of analysis of finger coordination based on an assumption of universal matrices of finger inter-dependence.

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“…Furthermore, it is the only flexor of the distal phalanx of the thumb and there are in general no inter-tendinous connections [14]. Some exceptions have been reported, such as anomalous tendon slips from the FPL to the deep flexor finger muscle which restricts FPL excursion [15].…”

Section: Discussionmentioning

confidence: 99%

Measurement of tendon excursion velocity with colour Doppler imaging: a preliminary study on flexor pollicis longus muscle

Cıgalı

Buyruk

Snijders

et al. 1996

European Journal of Radiology

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Abs1~'actPurpose: To study the use of colour Doppler imaging (CDI) for the measurement of maximum and mean tendon velocity. Recent studies showed that CDI, normally used for blood flow examinations, can be used for the imaging of tendons at the hand and wrist l'Cgion. Although other modalities are available for imaging of the musculo-skeletal system, in vivo measurements of the velocity of tendon excursion are not possible. Methods: The flexor pollicis longus (FPL) tendon of 16 healthy volunteers was measured bilaterally at two levels (wrist and thenar). A splint from the fingers along the proximal lower arm was applied. The thumb was fixed to the splint from the first phalanx to allow flexion of the interphalangeal (IP) joint only. Pulsed CDI was used for the measurements. The maximum and mean velocities of the FPL tendon were measured at spectrum display mode during continuous voluntary contractions. At least 10 sequential Doppler peaks (era/s) were recorded at every trial. The measurements were repeated three times. Paired t-test and correlation coefficients were calculated between levels on the same side and the opposite side. Results: No significant differences were found between two levels of the same hand and of the opposite hand. As expected, the data revealed variations in the inter-individual tendon velocities. Conclusions: The velocity of the excursion of the FPL tendon can be measured with CDI with good reproducibility. It is expected that velocity measurements can be used in the future for the assessment of other tendons affected by various disorders.

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The hand of the musician: The kinematics of the bidigital finger system with anatomical restrictions

Cited by 77 publications

References 11 publications

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Measurement of the Flexing Force of the Fingers by a Dynamic Splint With a Dynamometer

Finger inter-dependence: Linking the kinetic and kinematic variables

Measurement of tendon excursion velocity with colour Doppler imaging: a preliminary study on flexor pollicis longus muscle

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