The Role of the Flexor Carpi Radialis Muscle in Scapholunate Instability

Salvà-Coll, Guillem; García-Elias, Marc; Llusá-Pérez, Manuel; Rodríguez‐Baeza, Alfonso

doi:10.1016/j.jhsa.2010.09.023

Cited by 68 publications

(39 citation statements)

References 12 publications

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“…So we decided to do our own testing. With one of my doctoral fellows, Guillem Salvá, 28,29 we completed a cadaver study in which we loaded the FCR tendon while holding the hand in neutral position. Scaphoid displacements were monitored using a highly accurate electromagnetic motion-tracking system.…”

Section: Role Of Muscles In Carpal Stabilitymentioning

confidence: 99%

Understanding Wrist Mechanics: A Long and Winding Road

García-Elias

2013

Jnl Wrist Surg

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Section: Role Of Muscles In Carpal Stabilitymentioning

confidence: 99%

Understanding Wrist Mechanics: A Long and Winding Road

García-Elias

2013

Jnl Wrist Surg

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“…FCR located on the anterior part of the forearm that resists the scaphoid from rotating into flexion, thus, activates as the wrist comes into flexion and supination (Salvà‐Coll, Garcia‐Elias, Llusá‐Pérez, & Rodríguez‐Baeza, ). During weaving, the knot cutting involves coupling between wrist flexion and ulnar deviation simultaneously.…”

Section: Discussionmentioning

confidence: 99%

Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Singh

Meena

Chaudhary

2019

Hum Ftrs & Erg Mfg Svc

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The aim of this study is to evaluate several weaving knife configurations in response to multiple criteria's for optimum design. Nine different knife combinations were tested over ten female weavers in a field experiment. Three levels of blade width and angular orientations were taken as the independent variables. Output response about goniometry and electromyography were taken as dependent variables. Multivariate analysis was carried out to estimate the effect of independent variables on output responses. To tackle the difficulty of knife selection with several output responses, three multicriteria optimization approaches have been compared. Multivariate analysis of variance results showed that the effect of both blade width and angle were significant at wrist angles. Also, the magnitude of effect size on both blade width and the angle was highest for the wrist angles. Despite the same weighing criteria, a slight difference was evident between the ranks from optimization methods. The higher blade widths and smaller angular orientations should be recommended for reduction of wrist deviation and muscle activity during weaving. The best possible combination of knife evaluated using multicriteria optimization was 25 mm × 100°. K E Y W O R D S carpet weaving, design ergonomics, electromyography, goniometry, maximum voluntary isometric contractions, multiple-criteria decision-making, Taguchi loss function, technique for order of preference by similarity to ideal solution, VIšekriterijumsko KOmpromisno Rangiranje, weaving knife, wrist posture

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“…triceps brachii, biceps brachii, extensor digitorum, and flexor carpi radialis, are involved [25,26]. The contribution of each muscle to the screwing task is different; the M. triceps brachii is responsible for providing the forward directed force, the M. biceps brachii for supinating the arm and lifting the forearm, the M. extensor digitorum for stabilizing the wrist and providing grip support, and the M. flexor carpi radialis for gripping the devices and supporting wrist supination [27]. The height of the objects handled was adjusted to the participant's elbowheight when standing in an upright posture.…”

Section: Experimental Protocolmentioning

confidence: 99%

Sex differences in muscle activity and motor variability in response to a non-fatiguing repetitive screwing task

et al. 2020

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Background: Musculoskeletal disorders are more prevalent among women than among men, which may be explained by aspects of motor control, including neuromuscular requirements and motor variability. Using an exploratory approach, this study aimed to evaluate sex differences in neuromuscular responses and motor variability during a repetitive task performed on 3 days.Methods: Thirty women and 27 men performed the non-fatiguing, repetitive, 1-h screwing task. For neuromuscular responses, the mean and difference values of static, median, and peak percentile muscle activity levels (normalized to a reference voluntary contraction force) and, for motor variability, the mean and difference values of relative and absolute cycle-to-cycle variability across days were compared between both sexes for each muscle. A mixed-design analysis of variance was used to assess differences between both sexes.Results: The non-fatiguing character of the screwing task was confirmed by the absence of decreased force levels in maximal voluntary contractions performed before and after the task and by absence of electromyographic signs of muscle fatigue. The static and median muscle activity levels tended to be higher among women (on average 7.86 and 27.23 %RVE) than men (on average 6.04 and 26.66 %RVE). Relative motor variability of the flexor and biceps muscles and absolute motor variability of both upper arm muscles were lower in women (on average 0.79 and 29.70 %RVE) than in men (on average 0.89 and 37.55 %RVE). The median activity level of both upper arms muscles tended to decrease within days among women (on average -2.63 %RVE) but increase among men (on average + 1.19 %RVE). Absolute motor variability decreased within days among women (on average -5.32 to -0.34%RVE), whereas it tended to decrease less or increase within days among men (on average -1.21 to + 0.25 %RVE).Conclusion: Women showed higher levels of muscle activity and lower initial relative and absolute motor variability than males when performing the same occupational task, implying women may have a higher risk for developing disorders and point to both sexes using different intrinsic motor control strategies in task performance. Clearly, biological aspects alone cannot explain why women would be at higher risk for developing disorders than men. Therefore, a wider range of individual and environmental factors should be taken into account for optimizing work station designs and organizations by taking into account sex differences.

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The Role of the Flexor Carpi Radialis Muscle in Scapholunate Instability

Cited by 68 publications

References 12 publications

Understanding Wrist Mechanics: A Long and Winding Road

Understanding Wrist Mechanics: A Long and Winding Road

Application of multiple‐response optimization methods for the ergonomic evaluation of carpet weaving knife

Sex differences in muscle activity and motor variability in response to a non-fatiguing repetitive screwing task

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