Short-term effect of hand-arm vibration exposure on tactile sensitivity and manual skill

Thonnard, Jean-Louis; Masset, Dominique; Penta, Massimo; Piette, Alain; Malchaire, Jacques

doi:10.5271/sjweh.198

Cited by 10 publications

(8 citation statements)

References 17 publications

(15 reference statements)

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“…In a highly economical fashion, the grip force would be maintained just above the force under which the object would slip. This is supported by the fact that, when peripheral sensory information is impaired, the grip force is increased because the adjustment of grip force is no longer optimal, as shown in healthy participants with local anaesthesia of the index and thumb [35], in older adults [32], under mental stress in microgravity and hypergravity environments environments [36,37] and in patients with peripheral nerve lesions [38,39]. In the present study, we observed a similar increase of grip force in the dual-task condition, thus suggesting that participants adopted a similar behaviour to compensate the fact that the cognitive task interfered with the fine adjustment of grip force during the hold phase.…”

Section: Discussionmentioning

confidence: 99%

Cognitive-Motor Interference While Grasping, Lifting and Holding Objects

2013

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In daily life, object manipulation is usually performed concurrently to the execution of cognitive tasks. The aim of the present study was to determine which aspects of precision grip require cognitive resources using a motor-cognitive dual-task paradigm. Eighteen healthy participants took part in the experiment, which comprised two conditions. In the first condition, participants performed a motor task without any concomitant cognitive task. They were instructed to grip, lift and hold an apparatus incorporating strain gauges allowing a continuous measurement of the force perpendicular to each contact surface (grip force, GF) as well as the total tangential force applied on the object (load force, LF). In the second condition, participants performed the same motor task while concurrently performing a cognitive task consisting in a complex visual search combined with counting. In the dual-task condition, we found a significant increase in the duration of the preload phase (time between initial contact of the fingers with the apparatus and onset of the load force), as well as a significant increase of the grip force during the holding phase, indicating that the cognitive task interfered with the initial force scaling performed during the preload phase and the fine-tuning of grip force during the hold phase. These findings indicate that these aspects of precision grip require cognitive resources. In contrast, other aspects of the precision grip, such as the temporal coupling between grip and load forces, were not affected by the cognitive task, suggesting that they reflect more automatic processes. Taken together, our results suggest that assessing the dynamic and temporal parameters of precision grip in the context of a concurrent cognitive task may constitute a more ecological and better-suited tool to characterize motor dysfunction in patients.

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Section: Discussionmentioning

confidence: 99%

Cognitive-Motor Interference While Grasping, Lifting and Holding Objects

2013

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“…The decoupling between the two forces has been demonstrated in many neuromuscular disorders, such as Parkinsonism (Fellows et al, 1998), cerebellar damage (Muller and Dichgans, 1994;Hermsdorfer and Mai, 1996;Babin-Ratte et al, 1999;, multiple system atrophy (Muratori et al, 2003), decreased digit sensitivity due to digital anaesthesia (Edin et al, 1992;Nowak et al, 2001;Monzee et al, 2003) or cooling , developmental coordination disorders (Pereira et al, 2001), attention deficit disorders (Pereira et al, 2001), developmental (Pare and Dugas, 1999) or aging processes (Cole and Rotella, 2001), chronic sensory demyelinating neuropathy (Thonnard et al, 1997), carpal tunnel syndrome (Lowe and Freivalds, 1999), and acute median nerve compression (Cole et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Lower median nerve block impairs precision grip

Dun

Kaufmann

2007

Journal of Electromyography and Kinesiology

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“…Brammer et al (1987) and Bovenzi (1990) have suggested that manipulative dexterity depends on the functional capacity of the skin mechanoreceptors, which itself can be estimated by the vibration perception threshold (VPT) test. Thonnard et al (1997) recorded the VPT and the coordination of forces during a prehension test as proposed by Johansson et al (1980) following a 32-min period of exposure to 100 ms A2 at 160 Hz. Although the VPT increased drastically by more than 33 dB on average, the results of the prehension test remained unchanged.…”

Section: Introductionmentioning

confidence: 99%