Manual examination of accessory movements–seeking R1

Petty, N.J., Maher, C., Latimer, J. and Lee, M. (2002) Manual examination of accessory movements–seeking R1 Manual Therapy, 7 (1). pp. 39-43. ISSN 1356-689X

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Abstract

Movement diagrams are used by physiotherapists to depict the behaviour of resistance through the available range of accessory and physiological joint movement. It is generally accepted that for an asymptomatic joint, the resistance first felt by the therapist (R1) occurs towards the end of range. R1 is considered to be at the transition point between the toe and linear region of a load displacement curve. The aim of this study was to more accurately define R1 from force displacement curves of accessory movement to the spine and peripheral joints using a validated instrument, the Spinal Assessment Machine (SAM). Thirty archived force displacement curves obtained using the SAM, which applied a posteroanterior force of 100N at a frequency of 0.5 Hz to L3 spinous process, were examined. In addition force displacement curves were similarly obtained from the tibiofemoral joint, glenohumeral joint and radiocarpal joint of one asymptomatic individual. In all cases resistance to a PA movement commenced at the beginning of range, the curve ascending as soon as the force was applied. While in most cases there was a low stiffness ‘toe’ region there was no unambiguous point where it could be said that the toe region ended. It is concluded that for spinal and peripheral accessory movements both the onset of resistance and the toe occurs at the beginning of range. Therapists should therefore depict R1 at the beginning of range not toward the end of range as is current practice.

Item Type:Journal article
Subjects:B000 Health Professions > B900 Others in Health Professions > B950 Physiotherapy
B000 Health Professions
DOI (a stable link to the resource):10.1054/math.2001.0431
Faculties:Faculty of Health and Social Sciences > School of Health Professions
ID Code:893
Deposited By:editor health
Deposited On:04 Sep 2007
Last Modified:08 May 2012 15:46

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