Proposed mechanisms and treatment strategies for motion sickness disorder: a case series

Chronic Progressive External Ophthalmoplegia and Bilateral Vestibular Hypofunction: Balance, Gait, and Eye Movement Before and After Multimodal Chiropractic Care: A Case Study

Objective

The purpose of this report is to describe care of a patient with chronic progressive external ophthalmoplegia and bilateral vestibular hypofunction.

Clinical Features

A 66-year-old patient presented with limited eye movement and mild ptosis, which led to a diagnosis of chronic progressive external ophthalmoplegia. Rotary chair testing suggested vestibular involvement. Other symptoms included dizziness, problems with balance, and chronic stiffness in his cervical and thoracic regions. He had anxiety about loss of function and limited exercise habits because of fear of falling. Examination methods included balance assessment, kinetic aspects of walking, and videonystagmography.

Intervention and Outcome

He had already begun regular practice of vestibular rehabilitation exercises before receiving 18 sessions of manual and instrument-assisted chiropractic manipulation, along with mobilization, stretching, and transverse massage, over 37 weeks. In addition to self-reported improvements, there was substantially decreased postural sway during balance assessment and there were small improvements in eye movement, ptosis, and walking.

Conclusion

This patient showed improvements in balance, eye movements, and walking while undergoing multimodal chiropractic care and practicing eye and balance exercises.

The impact of vehicle motion during transport on animal welfare

Motion sickness is a common response in humans and some species of farm livestock during transport, but research on the impact of motion has been primarily focused on the use of animal models for humans. During livestock transportation, animals seek to minimise uncontrolled movements to reduce energy consumption and maintain posture. Road and sea transport of livestock can produce motion sickness and stress responses. Clinical signs are the result of autonomous nervous system activation. Studies conducted on road transportation effects in domestic animals showed several motion sickness behaviours including vomiting and, in ruminants, a reduction in rumination. However, there is a lack of knowledge on the impact of sea transport motion. Despite the paucity of data on livestock, there is sufficient evidence to believe that motion might affect animal welfare when animals are transported by road or sea.

Applied kinesiology: distinctions in its definition and interpretation

Modification of the motor system in assessing and treating as well as understanding one of the causes of musculoskeletal dysfunctions is a topic of growing importance in healthcare. Applied kinesiology (AK) addresses this interest in that it is a system which attempts to evaluate numerous aspects of health (structural, chemical, and mental) by the manual testing of muscles combined with other standard methods of diagnosis. It leads to a variety of conservative, non-invasive treatments which involve joint manipulations or mobilizations, myofascial therapies, cranial techniques, meridian and acupuncture skills, clinical nutrition and dietary management, counseling skills, evaluating environmental irritants, and various reflex techniques. The effectiveness of these ancillary treatments is believed to be consistent with the expanded construct validity of the manual muscle test (MMT), as described, although this assertion has primarily been tested in outcome studies. AK and its adjunctive procedures (challenge and therapy localization) are highlighted in this review providing details of its implementation as prescribed by an International College of Applied Kinesiology's Board of Examiners, cited for its scholarly and scientific activities. Because these procedures are believed to identify specific articular, soft tissue, biochemical, or emotional issues underlying muscle function, the applicability of this diagnostic method for all clinicians treating muscle imbalance disorders is described. As of yet, MMT efficacy in therapy localization and challenge techniques has not been established in published, peer-reviewed research. A variety of challenges likewise remain for professional AK to establish itself as an emerging science, with numerous gaps in the literature and testable hypotheses enumerated. Of particular concern are a multiplicity of derivatives of AK that have been described in the literature, which should be greeted with caution in light of the fact that they lack one or more of the essential attributes of AK as described in this report. The validity of these studies which have been critical of applied kinesiology appears in many instances to be no greater than several of the randomized controlled trials, cohort studies, case control studies, and case studies found in this communication to support various aspects of applied kinesiology.

On the reliability and validity of manual muscle testing: a literature review

INTRODUCTION

A body of basic science and clinical research has been generated on the manual muscle test (MMT) since its first peer-reviewed publication in 1915. The aim of this report is to provide an historical overview, literature review, description, synthesis and critique of the reliability and validity of MMT in the evaluation of the musculoskeletal and nervous systems.

METHODS

Online resources were searched including Pubmed and CINAHL (each from inception to June 2006). The search terms manual muscle testing or manual muscle test were used. Relevant peer-reviewed studies, commentaries, and reviews were selected. The two reviewers assessed data quality independently, with selection standards based on predefined methodologic criteria. Studies of MMT were categorized by research content type: inter- and intraexaminer reliability studies, and construct, content, concurrent and predictive validity studies. Each study was reviewed in terms of its quality and contribution to knowledge regarding MMT, and its findings presented.

RESULTS

More than 100 studies related to MMT and the applied kinesiology chiropractic technique (AK) that employs MMT in its methodology were reviewed, including studies on the clinical efficacy of MMT in the diagnosis of patients with symptomatology. With regard to analysis there is evidence for good reliability and validity in the use of MMT for patients with neuromusculoskeletal dysfunction. The observational cohort studies demonstrated good external and internal validity, and the 12 randomized controlled trials (RCTs) that were reviewed show that MMT findings were not dependent upon examiner bias.

CONCLUSION

The MMT employed by chiropractors, physical therapists, and neurologists was shown to be a clinically useful tool, but its ultimate scientific validation and application requires testing that employs sophisticated research models in the areas of neurophysiology, biomechanics, RCTs, and statistical analysis.