Identifying feigned isokinetic trunk extension effort in normal subjects: an efficiency study of the DEC

Spine
Zeevi Dvir, J Keating

Abstract

A test-retest comparison of maximal and feigned trunk extension effort in normal subjects was performed. To test the robustness of an index termed DEC for differentiating maximal from feigned effort in normal subjects. Previous studies have indicated that the DEC, which is the difference between the eccentric to concentric strength ratio at two test velocities, is a powerful identifier of feigned effort. This has been found for various muscle groups including the trunk extensors. However, whether this efficiency is affected by exposure to the protocol, learning, or other factors had not been examined. Using a KinCom isokinetic dynamometer, 18 men and 17 women were tested twice within 1 to 2 weeks. Concentric and eccentric efforts of the trunk extensors were exerted using a short range of motion (20 degrees ) and two test velocities (10 degrees and 40 degrees per second). In the first part of each test, participants exerted maximal force against the lever arm, whereas in the second part they were to feign their maximal capability, pretending the presence of injury. In both Tests I and II, the feigned DEC scores (DECf) of all the participants were greater than the maximal DEC (DECm) scores (P = 0.0001). Repeated measurement analy...Continue Reading

References

Mar 1, 1984·Spine·N A Langrana, C K Lee
Jun 1, 1995·Archives of Physical Medicine and Rehabilitation·J C Simonsen
Jun 1, 1996·Archives of Physical Medicine and Rehabilitation·Z Dvir, G David
Jun 1, 1997·Perceptual and Motor Skills·Z Dvir
May 26, 1999·American Journal of Physical Medicine & Rehabilitation·Z Dvir
Apr 5, 2000·Spine·W S MarrasM Parnianpour
Jan 1, 1980·The Journal of Orthopaedic and Sports Physical Therapy·G L SmidtW F Dostal

❮ Previous
Next ❯

Citations

Oct 27, 2004·The Clinical Journal of Pain·Michael E Robinson, Erin A Dannecker
Apr 3, 2003·Spine·Zeevi Dvir, Jennifer L Keating
May 7, 2002·American Journal of Physical Medicine & Rehabilitation·Zeevi DvirChava Peretz
Apr 9, 2013·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Joaquim ChalerZeevi Dvir
Aug 22, 2009·PM & R : the Journal of Injury, Function, and Rehabilitation·Paul W M MarshallBernadette A Murphy
Apr 1, 2008·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Jesús OlmoZeevi Dvir
Jul 11, 2006·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·J L CroisierZ Dvir
May 14, 2009·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Paul W M MarshallBernadette A Murphy
Mar 3, 2007·Clinical Rehabilitation·Joaquim ChalerRoser Garreta
Nov 26, 2002·American Journal of Physical Medicine & Rehabilitation·Zeevi Dvir

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.