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At least 127 records · Page 7Linked to original sources
PubMed2003

Sitting posture, postural discomfort, and visual performance: a critical view on the interdependence of cognitive and anthropometric factors in the VDU workplace.

The study focuses on individual and standard visual display unit (VDU) workplaces with respect to performance and muscular load. Three different work settings were realized: The workplace was either adjusted to individual preferences or to the European standard. The third condition mirrored exactly the individual setting, however participants were told that it was set according to another standard. Dependent variables were visual performance in a search task, the rated muscular load, and individual preferences. Results show that both individual work settings yielded a superior performance as compared to the standard. However, performance and muscular comfort improved when participants knew they had adjusted the workplace. Apparently, VDU users follow a intuitive rationale adjusting their work setting minimizing muscular load and optimizing performance.

Adult↗
PubMed1990

Posture and epidural catheter insertion. The relationship between skill, experience and maternal posture on the outcome of epidural catheter insertion.

This study was undertaken to investigate the outcome of epidural catheter insertion in the sitting or lateral position in mothers during labour. An initial prospective randomised study period (144 patients) suggested that the sitting position offered some superiority over the lateral in terms of technical ease of insertion. It was concluded, by minimising the subjective aspects in a follow-up, prospective nonrandomised study period (152 patients), that the determining factor lies in the skill and experience of the anaesthetist. There was no significant difference in complication rates or maternal discomfort between the two positions in either study period.

Analgesia, Epidural↗
PubMed1993

Gait style as an etiology to chronic postural pain. Part II. Postural compensatory process.

The body is designed to pull the center of mass over a single pivotal site formed by dorsiflexion of the first metatarsophalangeal joint. If this response dorsiflexion motion is blocked by functional hallux limitus, then the kinetic energy, which is created for this motion, must somehow be dissipated. The process by which this dissipation occurs creates a specific pattern of compensations which, in the past, has been seen as primary motions unrelated to sagittal plane blockade. These compensatory motions are described along with a brief section concerning the methods of treatment.

Cumulative Trauma Disorders↗
PubMed1999

[Effect of posture and postural fixation in repetitive nerve stimulation test].

Repetitive nerve stimulation (RNS) test is recognized as being useful in the diagnosis of myasthenia gravis. We investigated incremental response at high rate stimulation. Healthy 20 median nerves were stimulated with 120% of supramaximal intensity. Compound muscle action potential (CMAP) was recorded with a surface electrode on the abductor pollicis brevis. In a single stimulus the amplitude of CMAP in the passive and voluntary flexion position of the thumb increased by 8% and 34% compared with that of the mid-position. Nevertheless, the negative potential areas (NPA) of CMAP slightly decreased by 2% and 5%, because of the briefer duration by 10% and 30%. Additionally, the size of the first 4 CMAPs in the non-fixed condition was compared with in the fixed by the examiner's hand in RNS test. With 10 and 20/sec stimulation, NPA decreased by 5% and 12% by the comparison of the fourth value with the first, though the amplitude increased by 9% and 24%. With 20/sec stimulation the fixed condition reduced the increase of amplitude by 24% to 18% and the decrease of NPA by 12% to 4%. Incremental response at high rate stimulation is a classical clinical finding, however, in our study NPA decreased while the amplitude increased, which may relate to the briefer duration. The appreciation of NPA will be desired to reduce the influence of synchronization. Moreover, muscle fiber was investigated in two conditions, shortened in passive flexion and fibrillated in voluntary flexion. Consequently, besides synchronization induced by fibrillation, the position change increasing the elasticity of muscle could play a role in the incremental response. The effect of fixation demonstrated this suggestion and movement of muscles must be minimized by every possible means in RNS test.

Action Potentials↗