Michael Shacklock

Michael Shacklock
University of Eastern Finland | UEF · Physical and Rehabilitation Medicine

DipPhysio, MAppSc, FACP
Neurodynamics and measurement of nervous system movements. How to apply neurodynamics clinically.

About

74
Publications
94,029
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765
Citations
Citations since 2017
22 Research Items
333 Citations
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Introduction
Current area of PhD study: Conservative transient reduction of force in the lumbar nerve root for pain relief in persons with low back pain and sciatica from lumbar radiculopathy due to disc herniation.
Additional affiliations
April 2014 - September 2021
University of Eastern Finland
Position
  • PhD Student
Description
  • Currently undertaking PhD in measurement of neurodynamics. Director of Neurodynamic Solutions, research and education group, based in Adelaide, Australia.
January 2007 - March 2016
Independent Researcher
Independent Researcher
Position
  • Managing Director
January 2007 - present
Neurodynamics Solutions
Position
  • Managing Director
Description
  • Founder and director of Neurodynamic Solutions, professional organisation devoted to leading research and development in clinical neurodynamics for dissemination to the health professions globally.
Education
January 2007 - December 2007
Australian College of Physiotherapists
Field of study
  • Neurodynamics and Musculoskeletal Physiotherapy
January 1993 - December 1993
University of South Australia
Field of study
  • Musculoskeletal Physiotherapy
January 1989 - December 1989
University of South Australia
Field of study
  • Manipulative Therapy

Publications

Publications (74)
Article
Full-text available
Aims: Perform a pilot study of a static nerve root foramen opening protocol for lumbar radiculopathy from disc hernia in an emergency hospital setting to establish if patients could execute the protocol, consistency would occur across outcomes, superior outcomes would occur in the experimental group, and if the protocol would be safe. Methods: P...
Article
Full-text available
Background The straight leg raise test (SLR) is one of the most utilized and studied physical tests in patients with low back pain (LBP) for the detection of lumbar disc herniation (LDH), showing high sensitivity and heterogeneous or low specificity. The high incidence of asymptomatic ‘pathologic’ findings in the magnetic resonance imaging (MRI) sc...
Presentation
Full-text available
The first of the primary mechanical events in the nervous system is the generation of tension. It allows peripheral nerves to withstand approximately 18-22 % strain before failure. From Clinical Neurodynamics 2005 by Michael SCHACKLOCK http://www.neurodynamicsolutions.com/ movie by Bernard Delalande (somasimple 2016-2021)
Preprint
Full-text available
Background: The straight leg raise test (SLR) is one of the most utilized and studied physical tests in patients with low back pain (LBP) for the detection of lumbar disc herniation (LDH), showing high sensitivity and heterogeneous or low specificity. The high incidence of asymptomatic ‘pathologic’ findings in the magnetic resonance imaging (MRI) s...
Article
Background It is important to establish if mechanical testing for physical problems in the human is specific or non-specific for structures - e.g. muscle and nerve. The median nerve at the wrist can be moved in preference to its adjacent flexor digitorum longus muscle, but it is necessary to know if this specificity extends to the elbow. We therefo...
Article
Full-text available
Background The straight leg raise (SLR) is the most commonly applied physical tests on patients with sciatica, but the sensitivity and specificity ratings for disc hernia and neural compression leave areas for improvement. Hip internal rotation tensions the lumbosacral nerve roots and ankle dorsiflexion tensions the sciatic nerve along its course....
Preprint
Full-text available
Background: The straight leg raise (SLR) is the most commonly applied physical tests on patients with sciatica, but the sensitivity and specificity ratings for disc hernia and neural compression leave areas for improvement. Hip internal rotation tensions the lumbosacral nerve roots and ankle dorsiflexion tensions the sciatic nerve along its course....
Article
Introduction A key issue in neurodynamic testing is whether a manoeuvre designed to produce differential biomechanical behaviour (structural differentiation) of nerve compared to adjacent muscle is mechanically accurate. The aim of this study was to investigate the capacity of cervical contralateral lateral flexion to produce differential biomechan...
Data
Image of a spinal cord (terminal cone) used to show how neurodynamics solutions works on nerve roots. I will make movies to show the different available progressions of NDS. https://www.youtube.com/watch?v=gXF0rq0yx88&feature=emb_logo
Article
Background A structural differentiation maneuver has been proposed to differentiate between muscle and nerve involvement during the straight leg raise test. However, to date, the mechanical specificity of this maneuver for the tibial nerve at the posterior knee has not been tested. The aim of this study was to investigate the specificity of ankle d...
Article
Introduction: In hamstrings injuries, sciatic nerve and muscle disorders can coexist. Therefore, differential diagnosis to include or exclude nerve involvement is an important aspect of evaluation. The objective of this paper is to investigate the mechanical behaviour of the sciatic nerve and biceps femoris muscle in the proximal thigh with the an...
Article
Study design: A controlled radiologic follow-up study. Objective: The aim of this study was to ascertain whether changes in cord excursion with straight leg raise test (SLR) at 1.5-year follow-up time accompany changes in clinical symptoms. Summary of background data: Lumbar intervertebral disc herniation (LIDH) is known to be a key cause of s...
Presentation
Full-text available
From Clinical Neurodynamics 2005 by Michael SCHACKLOCK http://www.neurodynamicsolutions.com/ movie by Bernard Delalande (somasimple 2016)
Article
Study design: Cross-sectional study. Background: The carpal tunnel is a clinically important fibro-osseous conduit for the median nerve and associated tendons. It is mechanically dynamic and therapeutic manual techniques that appear to move and change tunnel shape is part of clinical practice. Objectives: To measure changes in dimensions of th...
Article
Full-text available
BACKGROUND CONTEXT Lumbar intervertebral disc herniation (LIDH) is known to be a key cause of sciatica. Previously we found a significant limitation of neural displacement (66.6%) with the straight leg raise test (SLR) on the symptomatic side of patients with sub-acute single level posterolateral LIDH. PURPOSE To ascertain if changes incord excurs...
Article
Full-text available
Objectives: The purpose of our study was to examine the characteristics, distribution, and behavior of sensory responses of the straight leg raise (SLR) test in asymptomatic individuals. We hypothesized that: 1) the sensory response would be along the sciatic nerve distribution and its distal tributaries, and 2) no significant difference in sensory...
Article
Introduction: The carpal tunnel is a clinically important fibro-osseous conduit for the median nerve and associated tendons. It is mechanically dynamic, such that the dimensions of the tunnel and median nerve change with position, movement and application of externally applied force with mechanical devices. Therapeutic manual techniques that appea...
Article
Background: Morphology of the carpal tunnel changes with varying wrist postures and compressive forces applied to the wrist. These changes may affect the morphology and pressure on the median nerve and could be used as part of the treatment of the carpal tunnel syndrome patients. Reliability of the ultrasonographic measurements of the median nerve...
Article
Full-text available
Objective: The purpose of this randomized trial was to compare the efficacy of manual therapy, including the use of neurodynamic techniques, with electrophysical modalities on patients with mild and moderate carpal tunnel syndrome (CTS). Methods: The study included 140 CTS patients who were randomly assigned to the manual therapy (MT) group, whi...
Article
Full-text available
This article focuses on specific mechanisms of neurodynamics for application to patients with acute lumbar radicular pain. New studies show that, contrary to popular belief, tension in the lumbar contralateral nerve roots and dura reduces when neurodynamic tests such as the SLR and slump tests are performed. This is shown with a newly validated ‘cr...
Article
The purpose of this investigation was to provide a full set of normal data describing neural biomechanics within the vertebral canal in all three planes with unilateral and bilateral SLR tests to allow for clinical comparison with clinical cases. This is done following the notion that, due to neural continuum, tensile forces are transmitted through...
Article
Full-text available
Background: Normal displacement of the conus medullaris with unilateral and bilateral SLR has been quantified and the "principle of linear dependence" has been described. Purpose: Explore whether previously recorded movements of conus medullaris with SLRs are i) primarily due to transmission of tensile forces transmitted through the neural tissu...
Article
Study design: Part 1: Randomized single blind study on the effect of contralateral knee extension on sensations produced by the slump test (ST) in asymptomatic subjects. Part 2: Cadaver study simulating the nerve root behavior of part 1. Objective: Part 1: Test if contralateral knee extension consistently reduces normal stretch sensations with t...
Article
Controlled radiologic study. Verify (i) whether conus medullaris displacement varies with range of hip flexion ii) if the acquired data support the "principle of linear dependence". We have previously quantified normal displacement of the conus with unilateral and bilateral SLR have and described the "principle of linear dependence". However, we ha...
Article
It has been shown that the conus medullaris displaces significantly and consistently in response to both unilateral and bilateral SLRs. Point of interest is represented by whether the magnitude of this displacement can be predicted in asymptomatic subjects. The purpose was to investigate whether any correlations existed between demographic and anth...
Conference Paper
Full-text available
CLINICAL REASONING AND NEURODYNAMICS MICHAEL SHACKLOCK DipPhysio, MAppSc, FACP Director, Neurodynamic Solutions, Adelaide, South Australia Clinical Consultant, Flex Rehabilitation Clinic, South Australia Invited Professor, Faculty of Medicine, Barcelo University, Buenos Aires. ABSTRACT Therapists seem to think that neurodynamics is simply the cu...
Article
Full-text available
It is generally accepted that muscles may activate via the common nociceptive flexion reflex (NFR) in response to painful stimuli associated with tensile or compressive forces on peripheral nerves. Following the basic assumption that the radial nerve may be stressed around the elbow during the execution of the Mills manipulation, two positions cons...
Article
Study Design. Controlled radiologic study.Objective. Ascertain if a difference exists in the mechanical effects on the cord between the unilateral and bilateral SLR and to verify whether the effect on the spinal cord may be cumulative between the two.Summary of Background Data. To the author's knowledge these are the first data on non-invasive, in-...
Article
Study design: Controlled radiological study. Objective: To investigate noninvasively in vivo spinal cord displacement in the vertebral canal during the passive straight leg raise (SLR) in asymptomatic subjects. The basic assumption is that the cord follows L5 and S1 nerve roots displacement by similar magnitude and direction (principle of linear...
Article
Introduction: Carpal tunnel syndrome (CTS) is the most common and most commonly described neuropathy of the peripheral nervous ¬system. Epidemiological data suggests that it is responsible for 90% of compression neuropathy cases. Purpose: The main objective of the study was to evaluate the effectiveness of physiotherapy based on manual therapy and...
Article
Full-text available
Mechanical treatment of neural tissues in physiotherapy have been in existence for quite some time now (Grieve 1970, Elvey(1979, Butler and Gifford 1989), Butler, 1991, Elvey and Hall 1999). In the early stages of the neural approaches, many of the techniques were based on only a small number of mechanisms and many aspects of a potentially new appr...
Article
To investigate the effect of isolated muscular variance, side and hand dominance on elbow-extension range-of-motion (EE-ROM) of the median nerve upper limb neurodynamic test (ULNT1). This study analyzes these variables potential to influence ULNT1 EE-ROM symmetry and the possible consequences for clinical practice and research. Controlled laborator...
Article
The author presents his system for treating various neurodynamic disorders. The key points are etiologic mechanisms, diagnostic categories, and progressive treatment in response to patients’needs and to clinical characteristics. Previous publications on the subject are available. Level of evidence: not applicable
Article
This article presented key issues in relation to diagnosis of neurodynamic testing ; what exactly is a positive test, false positive and false negative results, mechanosensitivity, structural differentiation, normal and abnormal neurodynamic tests. Clearly it is necessary for the clinician to understand these key points in order make diagnosis and...
Article
The neurodynamic approach created by the author results from progress in nerve mobilization and stretching compared with former methods. Progress has concerned nerve gliding, differences in mechanical pressure, intraneuronal blood flow and sensitivity (physiology) of the nervous tissues. Diagnosis and treatment are seen from the point of view of mu...
Article
Full-text available
Mobilisation of the nervous system is an approach to physical treatment of pain. The method relies on influencing pain. The method relies on influencing pain physiology via mechanical treatment of neural tissues and the non-neural structures surrounding the nervous system. Previous description of this method has not clarified the relevant mechanics...
Article
Full-text available
Firstly, I congratulate Ellis and Hing for performing this systematic review on therapeutic efficacy in clinical neurodynamics. It is an early and essential step in going beyond ‘anecdotal evidence’, a much needed move in this exciting area. What I like about it is that it is methodical, candid and claims no more than there is evidence for. As I se...
Article
This article describes the application of the concept of clinical neurodynamics with manual therapy to a patient with low back pain and radicular symptoms. The causal mechanisms have been carefully analyzed with emphasis on diagnostic categories and in the continue reevaluation that creates the progressions in the different treatment techniques.The...
Article
Several misconceptions in clinical diagnosis with neurodynamic (neural tension) tests have existed for some time. This paper attempts to resolve these problems and proposes various ways of linking the basic and clinical sciences to application and interpretation of neurodynamic tests in clinical practice. This is so that the approach can be more sc...
Article
Die Arbeit beschreibt die Anwendung des neuen Konzepts der Klinischen Neurodynamik im Rahmen Manueller Therapie bei einer Patientin mit Kreuzschmerzen und radikulären Symptomen. Bei der Behandlung der ursächlichen Mechanismen spielen diagnostische Kategorien und systematische Progression eine wesentliche Rolle. Die Techniken können auf die spezifis...
Article
Das neue System klinischer Neurodynamik bezieht sich auf neurale Störungen, die mit muskuloskelettalen Dysfunktionen zusammenhängen. Es umfasst Mechanik und Physiologie des Nervensystems, Neuropathodynamik sowie Diagnose- und Behandlungsprinzipien.
Article
A groundbreaking approach to neural mobilization, this one-of-a-kind resource draws on the established Maitland movement diagram to present a completely new system for mobilization of the neural and musculoskeletal systems. The text guides readers through the complex subject of neurodynamics and the basic mechanisms in movement of the nervous syste...
Article
Full-text available
Central pain mechanisms are deeply embodied in the psychophysical problem of pain. They are located in the brain and spinal cord and are becoming increasingly recognised as playing a major role in the generation and maintenance of pain and disability associated with neuromusculoskeletal problems. Central mechanisms participate in all pain states, a...
Article
Full-text available
Treatment of central pain mechanisms is a new horizon for manual therapists. This paper presents key points about central pain mechanisms and how they can be treated by the manual therapist. Included are facets of conditioning, memory and learning; some types of central problems and cognitive-behavioural and physical techniques for use by manual th...
Article
Full-text available
Mobilisation of the nervous system is an approach to physical treatment of pain. The method relies on influencing pain physiology via mechanical treatment of neural tissues and the non-neural structures surrounding the nervous system. Previous descriptions of this method have not clarified the relevant mechanics and physiology, including interactio...

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