Dizziness, unsteadiness, visual disturbances, and postural control: implications for the transition to chronic symptoms after a whiplash trauma

Clinical recognition of the role of the cervical spine in signs and symptoms of altered sensorimotor control

Together with visual and vestibular input the cervical spine is vital for sensorimotor control of head and eye movement control, general body postural stability adjustments and co-ordination. Altered cervical input in persons with neck disorders can lead to signs and symptoms of impaired sensorimotor control across and within several domains. Clinical assessment for differential diagnosis and to direct management of cervical related altered sensorimotor control is clearly required in many patients. This applies not only to patients with neck disorders but also in patients with, for example vestibular disorders or concussion, presenting with signs and symptoms of altered sensorimotor control where the cervical spine may have a role to play. This paper explores the research and current knowledge in relation to clinical measures of cervical related sensorimotor control. The feasibility, responsiveness, comparison to gold standards and potential of clinical measures of cervical related sensorimotor control to assist in differential diagnosis are considered where relevant. Future research directions should examine the full complement of psychometric properties of tests and consideration of any relationships of these measures to pain, dizziness, trauma and functional implications. Development of other measures as well as use in assessing response post management are also important directions. These clinical measures, along with a skilled interview and cervical musculoskeletal examination will enable clinicians to recognise and manage impaired cervical sensorimotor control in patients with neck disorders as well as determine the role of the cervical spine in many patients presenting with signs and symptoms of altered sensorimotor control.

Global trends and hotspots related to whiplash injury: A visualization study

Whiplash injury, commonly occurring as a result of car accidents, represents a significant public health concern. However, to date, no comprehensive study has utilized bibliometric approaches to analyze all published research on whiplash injury. Therefore, our study aims to provide an overview of current trends and the global research landscape using bibliometrics and visualization software. We performed a bibliometric analysis of the data retrieved and extracted from the Web of Science Core Collection database in whiplash injury research up to December 31, 2022. Research articles were assessed for specific characteristics, such as year of publication, country/region, institution, author, journal, field of study, references, and keywords. We identified 1751 research articles in the analysis and observed a gradual growth in the number of publications and references. The United States (379 articles, 21.64%), Canada (309 articles, 17.65%), and Australia (280 articles, 16.00%) emerged as the top-contributing countries/regions. Among institutions, the University of Queensland (169 articles, 9.65%) and the University of Alberta (106 articles, 6.05%) demonstrated the highest productivity. "Whiplash," "Neck Pain," "Cervical Spine Disease," and "Whiplash-associated Disorders" are high-frequency keywords. Furthermore, emerging areas of research interest included traumatic brain injury and mental health issues following whiplash injury. The number of papers and citations has increased significantly over the past 2 decades. Whiplash injury research is characteristically multidisciplinary in approach, involving the fields of rehabilitation, neuroscience, and spinal disciplines. By identifying current research trends, our study offers valuable insights to guide future research endeavors in this field.

Effectiveness of lumbar motion style acupuncture treatment on inpatients with acute low back pain: A pragmatic, randomized controlled trial

BACKGROUND AND PURPOSE

This parallel, single-center, pragmatic, randomized controlled study aimed to investigate the effectiveness and safety of motion style acupuncture treatment (MSAT; a combination of acupuncture and Doin therapy) to reduce pain and improve the functional disability of patients with acute low back pain (aLBP) due to road traffic accidents.

MATERIALS AND METHODS

Ninety-six patients with aLBP admitted to the Haeundae Jaseng Hospital of Korean Medicine in South Korea due to traffic accidents were treated with integrative Korean medicine (IKM) with additional 3-day MSAT sessions during hospitalization (MSAT group, 48 patients) or without (control group, 48 patients), and followed up for 90 days.

RESULTS

The mean numeric rating scale (NRS) scores of low back pain (LBP) of the MSAT and control groups were both 6.7 (95% confidence interval [CI]: 6.3, 7.1) at baseline. After completing the third round of all applicable treatment sessions (the primary endpoint in this study), the mean NRS scores of the MSAT and control groups were 3.76 (95% CI: 3.54, 3.99) and 5.32 (95% CI: 5.09, 5.55), respectively. The difference in the mean NRS score between the two groups was 1.56 (95% CI: 1.25, 1.87).

CONCLUSION

IKM treatment combined with MSAT can reduce pain and improve the range of motion of patients with aLBP.

TRIAL REGISTRATION

This trial is registered at ClinicalTrial.gov (NCT04956458).

The effect of a neck-specific exercise program on cervical kinesthesia for patients with chronic whiplash-associated disorders: a case-control study

INTRODUCTION

Cervical kinesthesia is an important part of movement control and of great importance for daily function. Previous research on kinesthesia in whiplash-associated disorders (WAD) has focused on grades I-II. More research is needed on WAD grade III. The aim of this study was to investigate cervical kinesthesia in individuals with WAD grades II-III before and after a neck-specific exercise intervention and compare them to healthy controls.

METHODS

A prospective, case-control study with a treatment arm (n = 30) and a healthy control arm (n = 30) was conducted in Sweden. The WAD group received a neck-specific exercise program for 12 weeks. The primary outcome to evaluate kinesthesia was neck movement control (the Fly test). Secondary outcomes were neck disability, dizziness and neck pain intensity before and after the Fly test. Outcomes were measured at baseline and post-treatment. The control arm underwent measurements at baseline except for the dizziness questionnaire. A linear mixed model was used to evaluate difference between groups (WAD and control) and over time, with difficulty level in the Fly test and gender as factors.

RESULTS

Between-group analysis showed statistically significant differences in three out of five kinesthetic metrics (p = 0.002 to 0.008), but not for the WAD-group follow-up versus healthy control baseline measurements. Results showed significant improvements for the WAD-group over time for three out of five kinaesthesia metrics (p < 0.001 to 0.008) and for neck disability (p < 0.001) and pain (p = 0.005), but not for dizziness (p = 0.70).

CONCLUSIONS

The exercise program shows promising results in improving kinesthesia and reducing neck pain and disability in the chronic WAD phase. Future research might benefit from focusing on adding kinesthetic exercises to the exercise protocol and evaluating its beneficial effects on dizziness or further improvement in kinesthesia.

IMPACT STATEMENT

Kinesthesia can be improved in chronic WAD patients without the use of specific kinesthetic exercises.

TRIAL REGISTRATION

ClinicalTrials.gov (NCT03664934), first registration approved 11/09/2018.

Is proprioception affected in those with persistent intra-articular temporomandibular disorders? A cross-sectional study exploring joint position sense and force sense of the jaw

BACKGROUND

Proprioception is an important component of normal jaw function, although to date it is unknown if and how proprioception is affected in those with intra-articular temporomandibular disorders (IA-TMDs). This challenges effective management of this subgroup.

OBJECTIVES

Determine whether differences in local joint position sense and force sense exist between individuals with IA-TMD and those without a jaw problem.

DESIGN

Cross-sectional study.

METHOD

Sixty age and sex matched participants were recruited (n = 30 IA-TMD, n = 30 healthy controls). Temporomandibular joint position sense was tested to one target (50% of maximal mouth opening) using a ruler. Temporomandibular force sense was tested to two targets (50% and 70% of maximal molar pain-free bite force) using a bite sensor. Constant, absolute and variable errors were calculated for each outcome and compared between groups using p-values and 95% confidence intervals for effect size (d).

RESULTS

Significantly greater degrees of constant, absolute and variable error were seen for force sense testing at the 50% target (p < 0.05). No statistically significant difference was observed between groups for joint position sense, or for constant or variable force sense error at the 70% target (p > 0.05). Despite this, all joint position sense and force sense measures demonstrated possible clinical significance (upper limits 95% CI d ≥ 0.5).

CONCLUSIONS

Force sense, particularly at lower levels, appears impaired in those with IA-TMD. Joint position sense and force sense at higher levels appear less affected, although may still be important to consider in the management of IA-TMD in some patients.

Perceived pain and disability but not fear of movement are associated with altered cervical kinematics in people with acute neck pain following a whiplash injury

OBJECTIVES

To determine if measures of cervical kinematics are altered in people with acute whiplash associated disorders (WAD) and secondarily, to examine whether kinematic variables are associated with self-reported outcomes.

METHODS

We recruited people with acute WAD within 15 days after a motor vehicle collision and asymptomatic control participants. All participants performed active neck movements at a self-determined velocity. Maximal range of motion (ROM), peak and mean velocity of movement, smoothness of movement, and cervical joint position error were assessed. Moreover, self-reported measures of perceived pain and disability, pain catastrophising, and fear of movement were obtained.

RESULTS

Sixty people participated: 18 with acute WAD (mean age [SD] 38.7 [12.0]) and 42 as asymptomatic controls (mean age [SD] 38.4 [10.2]). Participants with acute WAD showed significantly decreased ROM in all movement directions (p < 0.0001). All participants with acute WAD showed a reduction in the mean and peak velocity of movement in all directions (p < 0.0001) and the number of velocity peaks was significantly higher (i.e., reduced smoothness of movement) in those with acute WAD in all directions (p < 0.0001). Repositioning acuity following cervical rotation was not significantly different between groups. Neck pain-related disability showed the largest number of significant associations with kinematic features, while fear of movement was not associated with measures of cervical kinematics.

CONCLUSIONS

Participants with acute WAD presented with altered cervical kinematics compared to asymptomatic participants. Several measures of cervical kinematics were associated with the level of pain and disability in people with acute WAD but not their fear of movement.

Proprioceptive Disturbance in Chronic Neck Pain: Discriminate Validity and Reliability of Performance of the Clinical Cervical Movement Sense Test

Chronic neck pain is associated with sensorimotor dysfunctions, which may develop symptoms, affect daily activities, and prevent recovery. Feasible, reliable, and valid objective methods for the assessment of sensorimotor functions are important to identify movement impairments and guide interventions. The aim of this study was to investigate the discriminative validity of a clinical cervical movement sense test, using a laser pointer and an automatic video-based scoring system. Individuals with chronic neck pain of idiopathic onset (INP), traumatic onset (TNP), and healthy controls (CON) were tested. Associations between movement sense and neck disability were examined and the repeatability of the test was investigated. A total of 106 participants (26 INP, 28 TNP, and 52 CON) were included in a cross-sectional study. Acuity, Speed, Time, and NormAcuity (i.e., normalized acuity by dividing acuity with movement time) were used as outcome measures. ANOVAs were used for group comparisons and Pearson correlations for associations between movement sense variables and neck disability index (NDI). Notably, 60 of the participants (30 CON, 17 INP, and 13 TNP) performed the test on a second occasion to explore test-retest reliability. Results revealed a reduced NormAcuity for both INP and TNP compared with CON (p < 0.05). The neck pain groups had similar Acuity but longer Time compared with CON. Among TNP, there was a fair positive correlation between Acuity and NDI, while there was a negative correlation between Acuity and NDI among INP. Reliability measures showed good to excellent ICC values between tests, but standard error of measurements (SEM) and minimal detectable change (MDC) scores were high. The results showed that NormAcuity is a valuable measure to identify disturbed cervical movement sense among INP and TNP. While Acuity was similar between the groups, different strategies, such as longer Time, to perform the task among neck patient groups were used. Few differences were identified between the neck pain groups, but altered strategies may exist. Reliability was acceptable, and the test is feasible to perform in the clinic. However, the technical complexity of the automated image analysis is a concern. Future developments will provide more feasible solutions.

Assessment of Neuromuscular and Psychological Function in People with Recurrent Neck Pain during a Period of Remission: Cross-Sectional and Longitudinal Analyses

The aim of this study was to examine for the presence of differences in neuromuscular and psychological function in individuals with recurrent neck pain (RNP) or chronic neck pain (CNP) following a whiplash trauma compared to healthy controls. A secondary aim was to examine whether neuromuscular characteristics together with psychological features in people with RNP were predictive of future painful episodes. Multiple features were assessed including neck disability, kinesiophobia, quality of life, cervical kinematics, proprioception, activity of superficial neck flexor muscles, maximum neck flexion and extension strength, and perceived exertion during submaximal contractions. Overall, those with RNP (n = 22) and CNP (n = 8) presented with higher neck disability, greater kinesiophobia, lower quality of life, slower and irregular neck movements, and less neck strength compared to controls (n = 15). Prediction analysis in the RNP group revealed that a higher number of previous pain episodes within the last 12 months along with lower neck flexion strength were predictors of higher neck disability at a 6-month follow-up. This preliminary study shows that participants with RNP presented with some degree of altered neuromuscular features and poorer psychological function with respect to healthy controls and these features were similar to those with CNP. Neck flexor weakness was predictive of future neck disability.

Cervical musculoskeletal and sensorimotor impairments 4 weeks to 6 months following mild traumatic brain injury: An observational cohort study

BACKGROUND

Clinically relevant scores of neck disability have been observed in adults post mild traumatic brain injury (mTBI), even in those who initially report to be recovered. Potentially cervical musculoskeletal and/or cervical sensorimotor impairments may underlie these persistent symptoms post mTBI.

OBJECTIVE

To determine whether cervical impairments exist beyond expected recovery times following concussion compared to healthy controls (HC).

STUDY DESIGN

Observational cohort study.

METHODS

Participants aged 18-60 years consisting of 39 HC, and 72 individuals, 4 weeks to 6 months post mTBI of which 35 considered themselves asymptomatic (Asymp), and 37 symptomatic (Symp). Cervical outcome measures included range and velocity of motion, flexor muscle endurance, presence of at least one dysfunctional cervical joint, joint position error -neutral and torsion, movement accuracy, smooth pursuit neck torsion test (SPNT) and balance.

RESULTS

Individuals in the Symp mTBI group demonstrated significantly reduced: flexion and rotation range, rotation velocity, flexor endurance and movement accuracy as well as increased postural sway and a higher percentage had positive cervical joint dysfunction (p < 0.01]. The mTBI group who considered themselves recovered (Asymp)demonstrated significantly lower rotation range, flexor endurance, and a higher percentage had positive cervical joint dysfunction and positive SPNT (p < 0.05) compared to HCs.

CONCLUSION

Individuals reporting symptoms post mTBI demonstrated cervical spine musculoskeletal and sensorimotor impairments beyond expected recovery times. Those not reporting symptoms had fewer but some cervical impairments. The need for a comprehensive neck assessment should be considered, perhaps even in those not reporting symptoms.

Use of Soft Cervical Collar among Whiplash Patients in Two Italian Emergency Departments Is Associated with Persistence of Symptoms: A Propensity Score Matching Analysis

Purpose: Although the use of soft cervical collars in the emergency department (ED), for whiplash-associated disorders (WAD), is controversial, it is still widely adopted. The purpose of our study was to investigate the impact of the early use of soft cervical collars on the return to the ED, within three months of a road traffic collision. Methods: We conducted a retrospective observational study on WAD patients from two EDs in Verona (Italy). Patients in the earlier acute phase of WAD (within 48 h from the trauma) were included; those with serious conditions (WAD IV) were excluded. As an end point, we considered patients who returned to the ED complaining of WAD symptoms within three months as positive outcome for WAD persistence. Results: 2162 patients were included; of those, 85.4% (n = 1847/2162) received a soft cervical collar prescription. Further, 8.4% (n = 156/1847) of those with a soft cervical collar prescription, and 2.5% (n = 8/315) of those without a soft cervical collar (p < 0.001) returned to the ED within three months. The use of the soft cervical collar was an independent risk factor for ED return within three months, with an OR, adjusted for possible clinical confounders, equal to 3.418 (95% CI 1.653–7.069; p < 0.001). After the propensity score matching, 25.5% of the patients (n = 25/98) using the soft cervical collar returned to the ED at three months, compared to the 6.1% (n = 6/98) that did not adopt the soft cervical collar. The use of a soft cervical collar was associated with ED return with an OR = 4.314 (95% CI 2.066–11.668; p = 0.001). Conclusions: Our study shows that the positioning of the soft collar in a cohort of patients with acute WAD, following a rear-end car collision, is an independent potential risk factor to the return to the ED. Clinically, the use of the collar is a non-recommended practice and seems to be related to an increased risk of delayed recovery. There is a need to inform healthcare providers involved in the ED of the aim to limit the use of the soft cervical collar. A closer collaboration between clinicians (e.g., physicians, physical therapists, nurses) is suggested in the ED. Future primary studies should determine differences between having used or not having used the collar, and compare early physical therapy in the ED compared with the utilization of the collar.

A Single-Center Retrospective Study on the Effects of Korean Medicine in 342 Traffic Accident Cases

Objectives

In South Korea, traffic accident victims can be treated under automobile insurance coverage. Korean medicine (KM) clinics have reported the largest number of automobile insurance fee claims among medical institutions. This study investigated the status of the KM automobile insurance system in a single KM clinic.

Methods

We retrospectively surveyed the medical charts of 342 traffic accident patients treated at the Jisung KM clinic between January 2009 and June 2017.

Results

Most of the patients were men and in their 30s. The most common method of locating the clinic was an internet search. The most common traffic accident type was collision between vehicles (83.63%), with 70.76% of patients visiting during the most acute phase. The major disease codes included S434, M4836, F072, S0600, and S3350. The most frequent treatment period was within 1 month of the accident, and most patients received 10 or fewer treatments. The mean treatment duration and number of treatments were 37.68 ± 45.11 days and 11.68 ± 10.63 treatments, respectively. The initial pain numerical rating scale (NRS), 7.32 ± 0.96, decreased to 3.57 ± 1.40 at the end of treatment, with a symptom improvement score of 1.87 ± 0.60. Regarding sex, age, disease duration, location at the time of the accident, presence of additional and psychological symptoms, and chuna, there were statistically significant differences in treatment duration and number of treatments. A higher number of treatments and the longer treatment duration was associated with a higher initial NRS, lower post-treatment NRS, and better improvement score. Since the introduction of traffic accident (TA) pharmacopuncture, the rate of use of a single type of pharmacopuncture increased; however, no significant differences in treatment duration and number, NRS before and after treatment, and improvement score were observed between treatment groups before and after TA pharmacopuncture. No adverse reactions were observed for any treatment.

Conclusion

This study confirmed the previous findings of a high treatment effect of KM under automobile insurance. We also observed significant correlations based on a detailed medical status, which may explain the increasing use of KM in the automobile insurance system. Additional multi-center studies in different regions are needed.

An upper cervical spine treatment protocol for cervicogenic dizziness: a randomized controlled trial

INTRODUCTION

Physiotherapy is a common treatment used for cervicogenic dizziness (CD). Treatment of the cervical spine using manual therapy techniques shows moderate evidence in favor of its use. International criteria for the treatment of the cervical spine have been described. Detecting patients' contraindications is the most important safety consideration. International criteria and recommendations for treatment of the cervical spine have been described, as well as safety criteria. A safe traction-manipulation intervention protocol is therefore possible. However, the effects of this protocol on dizziness intensity and dizziness-related disability have not been studied.

OBJECTIVE

To analyze the effects of a traction-manipulation protocol in patients with CD.

METHODS

The patients were referred by an otoneurologist, and after inclusion were randomly divided into a control group and an intervention group. The intervention was based on the application of a traction-manipulation protocol in the resting position. Dizziness intensity, self-reported disability, and cervical range of motion with and without a fixed gaze were assessed. All data were collected beforehand and at two days and four weeks after intervention.

RESULTS

At the two-days follow-up, statistically significant differences in favor of the intervention were observed between groups in the primary outcomes of dizziness intensity (p < .001) and Dizziness Handicap Inventory (p < .001), and at the four-week follow-up in dizziness intensity (p < .001) and Dizziness Handicap Inventory (p < .001).

CONCLUSIONS

The traction-manipulation protocol reduces the intensity of dizziness, the patient's self-perceived disability, and improves cervical mobility with and without fixed gaze.

A meta-analysis and systematic review of changes in joint position sense and static standing balance in patients with whiplash-associated disorder

OBJECTIVE

To synthesise and analyse the current evidence regarding changes in joint position sense (JPS) and standing balance in people with whiplash-associated disorder (WAD) taking the presence or absence of dizziness into account.

DATA SOURCES

PubMed, CINAHL Plus, Web of Science, Embase, MEDLINE and APA PsycINFO were searched by two independent reviewers from inception until August 2020 and reference lists of all included studies were also reviewed.

STUDY SELECTION

Only cross-sectional studies that measured JPS and/or standing balance between people with WAD vs. healthy controls (HC) or people with WAD complaining of dizziness (WADD) vs. those not complaining of dizziness (WADND) were selected.

DATA EXTRACTION

Relevant data were extracted using specific checklists and quality assessment was performed using Downs and Black Scale (modified version).

DATA SYNTHESIS

Twenty-six studies were included. For JPS, data were synthesized for absolute error in the primary plane of movement for separate movement directions. For standing balance, data were synthesized for traditional time- and frequency domain sway parameters considering the conditions of eyes open (EO) and eyes closed (EC) separately. For meta-analysis, reduced JPS was observed in people with WAD compared to HC when the head was repositioned to a neutral head position (NHP) from rotation (standardised mean difference [SMD] = 0.43 [95%: 0.24-0.62]) and extension (0.33 [95%CI: 0.08-0.58]) or when the head was moved toward 50° rotation from a NHP (0.50 [0.05-0.96]). Similarly, people with WADD had reduced JPS compared to people with WADND when the head was repositioned to a NHP from rotation (0.52 [0.22-0.82]). Larger sway velocity and amplitude was found in people with WAD compared to HC for both EO (0.62 [0.37-0.88] and 0.78 [0.56-0.99], respectively) and EC (0.69 [0.46-0.91] and 0.80 [0.58-1.02]) conditions.

CONCLUSION

The observed changes of JPS and standing balance confirms deficits in sensorimotor control in people with WAD and especially in those with dizziness.

Derivation of a Focused, Brief Concussion Physical Examination for Adolescents With Sport-Related Concussion

OBJECTIVE

To describe the derivation of a brief but pertinent physical examination (PE) for adolescents who have sustained sport-related concussion (SRC).

DESIGN

Prospective cohort.

SETTING

University concussion management clinic.

PARTICIPANTS

Acutely concussed (AC, n = 52, 15.5 ± 1.4 years, 4.4 ± 2 days since injury, 26.2 ± 38 days to recovery, 71% males) and healthy control (HC) adolescents (n = 30, 15.8 ± 1.4 years, 73% males).

INTERVENTION

Acutely concussed had a PE on visit 1 and were retested at visit 2 (13.6 ± 1 day after visit 1). Acutely concussed were further characterized as normal recovery (NR, n = 41, 15.5 ± 1.5 years, recovery time 13.0 ± 7 days) and delayed recovery (DR, n = 11, 15.5 ± 1.2 years, recovery time 75.4 ± 63 days).

MAIN OUTCOME MEASURE

Physical examination findings, including cervical, vestibular, and oculomotor systems.

RESULTS

Visit 1 abnormal PE signs were significantly greater in AC versus HC (2.79 ± 2.13 vs 0.07 ± 0.37, P < 0.0001) but not in NR versus DR (2.61 ± 2.2 vs 3.45 ± 1.8, P = 0.246). Visit 2 abnormal PE signs differentiated NR versus DR (0.17 ± 0.7 vs 2.45 ± 2.1, P < 0.0001).

CONCLUSIONS

A brief focused PE can help to diagnose SRC, establish recovery, and may have prognostic value.

Effectiveness of Kinaesthetic Exercise program on Position Sense, Pain, and Disability in Chronic Neck Pain Patients with Cervical Spondylosis – A Randomized Comparative Trial

Background Chronic neck pain (CNP) is a significant health problem with only a few evidence-based treatment options. There is growing evidence for the effectiveness of kinaesthetic rehabilitation in musculoskeletal disorders. This study aims to assess kinaesthetic exercise programs' efficacy on cervical position sense, pain, and disability in subjects with cervical spondylosis (CS).

Methods CNP subjects (>3 months) with a diagnosis of CS were randomly assigned to either a study group (n=125) who received kinesthetic exercises or to a comparative group (n=125) who received isometric neck exercises and deep cervical flexor (DCF) strengthening exercises. Both group subjects participated in the individualized training program for 24 sessions in 6 weeks. The outcome measures were cervical joint position errors (JPE’s) in flexion, extension, rotation left and right, pain intensity, and neck disability.

Results All outcomes were improved significantly from baseline to post 24 sessions of intervention. When compared between groups, there was a significant reduction in JPE’s in flexion (mean difference [MD]= 071, CI=0.22–1.20, p=0.001), extension (MD=1.26, CI=0.70–1.81, p< 0.001) and right rotation (MD=1.08, CI=0.58–1.58, p<0.001), pain intensity (MD=1.58, CI=1.09–2.08, p<0.001), and neck disability (MD=10.27, CI=7.42–13.12, p<0.001) after 24 sessions of intervention favoring the study group.

Conclusion Study group subjects who received kinesthetic rehabilitation showed more significant improvements in terms of improved proprioception, decreased pain intensity and disability following 24 sessions of interventions compared with the comparative group.

Self-Kinematic Training for Flight-Associated Neck Pain: a Randomized Controlled Trial

BACKGROUND: Flight-associated neck pain (FANP) is a serious problem in fighter pilots. Despite the high impact of FANP there is little evidence for effective management. However, self-kinematic training showed a positive effect in the general population. The purpose of this study was to investigate the effectiveness of a self-kinematic training program using virtual reality in improving neck pain in fighter pilots.METHODS: There were 45 pilots with FANP who were randomized to a control group (N 23) or a training group (N 22). Training participants were instructed to exercise using a personalized self-training program, for 20 min/wk, for 4 wk. Primary outcome measures were neck disability (NDI%) and mean velocity ( s¹), and secondary were pain, health status, accuracy, and isometric strength. Assessments were conducted by a blinded assessor and intention-to-treat analysis by a blinded statistician.RESULTS: There were 40 pilots who completed the postintervention assessments, and 35 completed the 6-mo follow-up. Baseline measurements showed mild pain and disability (mean VAS 43 22.73, NDI 17.76 9.59%) and high kinematic performance. Compliance with self-training was poor. No differences were observed in self-reported measures and strength. Exercise duration was correlated with NDI% improvement.DISCUSSION: This self-kinematic training promoted kinematic performance, but was ineffective in engaging the pilots to exercise, and consequently did not improve pain and disability. Poor compliance was previously reported in self-training for FANP, suggesting further studies should prioritize supervised training. Considering the high baseline kinematic performance, kinematics does not seem to be a key factor in FANP, and future exercise research should aim for intense strengthening to increase endurance to the high G_z pilots experience.Sarig Bahat H, German D, Palomo G, Gold H, Frankel Nir Y. Self-kinematic training for flight-associated neck pain: a randomized controlled trial. Aerosp Med Hum Perform. 2020; 91(10):790797.

Can a simple clinical test demonstrate head-trunk coordination impairment in neck pain?

BACKGROUND

Sensorimotor impairment in neck pain sufferers is well established. Recent research has identified impairment in head and trunk co-ordination in this population. Presently, no clinically appropriate testing exists to quantify such impairment.

OBJECTIVE

To determine if a simple and clinically relevant test of head-trunk co-ordination can identify dysfunction in neck pain subjects when compared to healthy controls.

STUDY DESIGN

Cross-sectional observational study.

METHODS

Thirty-one neck pain and 29 healthy control subjects were assessed using head- and chest-mounted lasers with a target positioned 90 cm away. Subjects were required to rotate the trunk at least 45° with the head laser to be kept as accurately as possible in the centre of the target while sitting and standing. Maximal deviation of the head to the left and right of the target's centre with each trunk movement was measured.

RESULTS

The neck pain group demonstrated significantly greater head deviation from the centre in all but one test direction (p= <0.03). Head deviation to the same side as trunk rotation was larger in the neck pain group for both sitting and standing (p= <0.01). No significant differences existed between testing in sitting and standing.

CONCLUSION

Differences in trunk-head control exist in persons suffering from neck pain compared to healthy individuals, which can be demonstrated using simple equipment suggesting clinical utility of the measure. Performing the task in standing would seem most suitable as it can avoid influence by reduced thoracic mobility. Further research is required to establish the clinical suitability of this test.

Patients with mild traumatic brain injury and acute neck pain at the emergency department are a distinct category within the mTBI spectrum: a prospective multicentre cohort study

BACKGROUND

Acute neck pain (ANP) has recently been demonstrated to be a predictor of persistent posttraumatic complaints after mild traumatic brain injury (mTBI). The aim of this study was to determine specific characteristics of patients with ANP following mTBI, their posttraumatic complaints and relationship with functional outcome.

METHODS

Data from a prospective follow-up study of 922 mTBI patients admitted to the emergency department (ED) in three level-one trauma centres were analysed. Patients were divided into two groups: 156 ANP patients and 766 no acute neck pain (nANP) patients. Posttraumatic complaints were evaluated 2 weeks and 6 months post-injury using standardized questionnaires and functional outcome was evaluated at 6 months with the Glasgow Outcome Scale Extended (GOSE).

RESULTS

ANP patients were more often female (p < 0.01), younger (38 vs. 47 years, p < 0.01) with more associated acute symptoms at the ED (p < 0.05) compared to nANP patients. More motor vehicle accidents (12% vs. 6%, p = 0.01) and less head wounds (58% vs. 73%, p < 0.01) in ANP patients indicated 'high-energy low-impact' trauma mechanisms. ANP patients showed more posttraumatic complaints 2 weeks and 6 months post-injury (p < 0.05) and more often incomplete recovery (GOSE < 8) was present after 6 months (56% vs. 40%, p = 0.01).

CONCLUSIONS

MTBI patients with acute neck pain at the ED constitute a distinct group within the mTBI spectrum with specific injury and demographic characteristics. Early identification of this at risk group already at the ED might allow specific and timely treatment to avoid development of incomplete recovery.

Intensive Motion Style Acupuncture Treatment (MSAT) Is Effective for Patients with Acute Whiplash Injury: A Randomized Controlled Trial

In this single-center, parallel, randomized controlled trial, we aim to examine the effects and safety of motion style acupuncture treatment (MSAT; a combination of acupuncture and Doin therapy) on pain reduction and functional improvement in patients with whiplash-associated disorders (WADs). Ninety-seven patients with cervical pain admitted to the Bucheon Jaseng Hospital of Korean Medicine, South Korea, due to acute whiplash injury were treated with integrative Korean medicine (IKM) with (MSAT group, 48 patients) or without (control group, 49 patients) an additional 3-day MSAT during hospitalization (5-14 days) and followed-up for 90 days. The mean numeric rating scale (NRS) scores of the MSAT and control groups at baseline were 5.67 (95% confidence interval (CI), 5.33, 6.01) and 5.44 (95% CI, 5.06, 5.82), respectively, and on day 5, 3.55 (95% CI, 3.04, 4.06) and 4.59 (95% CI, 4.10-5.07), respectively. The NRS change difference between the groups was -1.07 (95% CI, -1.76, -0.37). The rate of recovery of neck pain (NRS score change ≥ 2 points) was significantly faster in the MSAT than in the control group (log-rank test p = 0.0055). IKM treatment combined with MSAT may be effective in reducing the pain and improving the range of motion in patients with WADs.

Presence of Neck or Shoulder Pain Following Sport-Related Concussion Negatively Influences Recovery

Our objective was to examine the effect of current neck or shoulder pain on concussion outcomes. Variables included symptom resolution and return-to-sport time, symptom severity, amount of school missed, and sleep disturbances. Three hundred twelve patients (37% female; median age = 15.0 years; evaluated median = 9 days postinjury) reported experiencing current neck or shoulder pain at initial evaluation, and 268 did not (31% female; median age = 14.7 years; evaluated median = 8 days postinjury). Neck or shoulder pain was associated with longer symptom resolution time (β = 6.38, 95% confidence interval [CI] = 2.44, 10.31; P = .002), more severe symptoms (β = 7.06, 95% CI = 4.91, 9.21; P < .001), and greater odds of missing >5 days of school (adjusted odds ratio [aOR] = 1.89, 95% CI = 1.23, 2.93; P = .004), and postinjury sleep problems (aOR = 2.20, 95% CI = 1.51, 3.21; P < .001). Experiencing neck or shoulder pain during the initial postinjury clinical evaluation was associated with worsened clinical outcomes. Clinicians may consider referral to early rehabilitation following concussion among those who report neck or shoulder pain.

Recovery despite everyday pain: Women's experiences of living with whiplash-associated disorder

INTRODUCTION

Living with whiplash-associated disorders (WAD) means living every day under the influence of pain and limitations. As the incidence of WAD and the related intensity of pain are somewhat higher among women than men, the aim of the present study was to describe women's experiences of living with WAD.

METHODS

A purposive sample of seven women participated in individual in-depth qualitative interviews, the transcripts of which were subjected to qualitative content analysis.

RESULTS

The results of the analysis suggested six themes of women's experiences with WAD: living with unpredictable pain; trying to manage the pain; living with limitations; being unable to work as before; needing support and understanding; and learning to live with limitations. The findings showed that unpredictable pain limited women's strength to engage in activities of daily life and be as active as before. Support and understanding were important for their ability to manage changes in their daily lives.

CONCLUSIONS

Pain considerably affects the daily lives of women with WAD, particularly by limiting their ability to perform activities and to enjoy their professional and social lives. As women with WAD need support with managing their daily lives, nurses and other healthcare personnel should adopt a person-centred approach, in order to support such women according to their individual needs and circumstances.

Cervicovestibular rehabilitation in adult with mild traumatic brain injury: a randomised controlled trial protocol

Background

Mild traumatic brain injury (mTBI) is an acknowledged public health problem. Up to 25% of adult with mTBI present persistent symptoms. Headache, dizziness, nausea and neck pain are the most commonly reported symptoms and are frequently associated with cervical spine and vestibular impairments. The most recent international consensus statement (2017 Berlin consensus) recommends the addition of an individualized rehabilitation approach for mTBI with persistent symptoms. The addition of an individualized rehabilitation approach including the evaluation and treatment of cervical and vestibular impairments leading to symptoms such as neck pain, headache and dizziness is, however, recommended based only on limited scientific evidence. The benefit of such intervention should therefore be further investigated.

Objective

To compare the addition of a 6-week individualized cervicovestibular rehabilitation program to a conventional approach of gradual sub-threshold physical activation (SPA) alone in adults with persistent headache, neck pain and/or dizziness-related following a mTBI on the severity of symptoms and on other indicators of clinical recovery. We hypothesize that such a program will improve all outcomes faster than a conventional approach (between-group differences at 6-week and 12-week).

Methods

In this single-blind, parallel-group randomized controlled trial, 46 adults with subacute (3 to12 weeks post-injury) persistent mTBI symptoms will be randomly assigned to: 1) a 6-week SPA program or 2) SPA combined with a cervicovestibular rehabilitation program. The cervicovestibular rehabilitation program will include education, cervical spine manual therapy and exercises, vestibular rehabilitation and home exercises. All participants will take part in 4 evaluation sessions (baseline, week 6, 12 and 26) performed by a blinded evaluator. The primary outcome will be the Post-Concussion Symptoms Scale. The secondary outcomes will be time to clearance to return to function, number of recurrent episodes, Global Rating of Change, Numerical Pain Rating Scale, Neck Disability Index, Headache Disability Inventory and Dizziness Handicap Inventory. A 2-way ANOVA and an intention-to-treat analysis will be used.

Discussion

Controlled trials are needed to determine the best rehabilitation approach for mTBI with persistent symptoms such as neck pain, headache and dizziness. This RCT will be crucial to guide future clinical management recommendations.

Trial registration

ClinicalTrials.gov Identifier - NCT03677661, Registered on September, 15th 2018.

Can the Neck Contribute to Persistent Symptoms Post Concussion? A Prospective Descriptive Case Series

BACKGROUND

Persistent symptoms post concussion can arise from a range of sources, including the neck. There is little description of neck assessment findings in people with persistent symptoms post concussion.

OBJECTIVES

To assess people with persistent symptoms following a concussion and determine whether the neck has also been injured, and to evaluate the potential of the neck to contribute to their symptoms.

METHODS

A consecutive series of participants (n = 20) referred for neck assessment were prospectively recruited by 2 providers of a multidisciplinary concussion service for people with persistent symptoms. Data were collected at initial assessment and on completion of neck treatment, which included standard questionnaires (Rivermead Post Concussion Symptoms Questionnaire, Neck Disability Index, Dizziness Handicap Inventory); patient-reported measures of headache, dizziness, and neck pain; physical examination findings; and details of comorbidities.

RESULTS

Participants were evaluated at a mean of 7.5 weeks post concussion (median, 5 weeks). On neck assessment, 90% were considered by the clinician to have a neck problem contributing to their current symptoms. Multiple findings were consistent with this view, including moderate-to-severe Neck Disability Index scores (mean ± SD, 33.4 ± 9.5 points), frequent neck pain (85%), frequent moderate-to-severe pain on occiput-C4 segmental assessment (85%), a positive flexion-rotation test (45%), and muscle tenderness (50%-55%).

CONCLUSION

Multiple findings were indicative of concurrent neck injury, particularly involving the upper cervical spine. These neck-related findings are important to recognize, as they have the potential to contribute to persistent symptoms post concussion and may respond to neck treatment. This study was prospectively registered with the Australian New Zealand Clinical Trials Registry (ACTRN12616001183471). J Orthop Sports Phys Ther 2019;49(11):845-854. Epub 1 Jun 2019. doi:10.2519/jospt.2019.8547.

Clinical assessment of cervical movement sense in those with neck pain compared to asymptomatic individuals

BACKGROUND

A simple clinical test involving subject tracing zigzag (ZZ) and figure of eight (F8) patterns with a head mounted laser device in determining cervical movement sense has proven reliability and feasibility. However, its validity in comparing individuals with and without neck pain (NP) has not been examined.

METHODS

Seventy-six subjects (38 NP and 38 asymptomatic subjects) performed both patterns while motion of their laser point was videoed. Independent examiners subsequently rated the videos (real-time) to record the time needed and the number of errors when completing each task. Sensitivity, specificity, and positive and negative likelihood ratios (LR+ and LR-) for various cut-offs to optimise clinical interpretation were determined. Comparisons between 25 subjects with idiopathic neck pain versus 13 with whiplash-associated disorders were also undertaken.

RESULTS

All outcome variables except ZZ time were significantly different between individuals with NP and controls. Optimal cut-offs of 9 and 10 errors yielded LR+/LR- of 3.67/0.17 (F8) and 3.00/0.38 (ZZ). Whiplash patients performed the ZZ task faster with similar errors to those with idiopathic neck pain.

CONCLUSION

The clinical utility of this inexpensive measure to assess cervical movement sense in people with NP is supported. Moderate LRs+ were demonstrated for number of errors for both patterns. Individuals with NP generated significantly more errors while tracing each pattern. Optimal cut offs of 9 errors for ZZ and 10 errors for F8 were established. Overall, these tests appear to be clinically suitable to determine altered cervical movement sense in those with NP.

Computer vision symptoms in people with and without neck pain

BACKGROUND

Sixty-four to 90% of computer users experience symptoms of computer vision syndrome (CVS). People with CVS symptoms experience neck pain (NP), and people with NP can have visual symptoms.

OBJECTIVES

(1) To examine differences in CVS symptoms in computer users with and without persistent NP. (2) To determine relationships between visual ergonomics, demographics, and CVS in those with and without persistent NP DESIGN: Comparative cross-sectional observational study METHOD: An online survey consisting of multiple questionnaires including the Computer Vision Syndrome Questionnaire (CVS-Q), Visual Symptoms Survey (VSS), and Convergence Insufficiency Symptoms Survey (CISS) was completed by 167 participants.

RESULTS

The persistent NP group had significantly higher CVS-Q, VSS, and CISS scores (p <0.01) compared to controls. No relationships were found between visual ergonomics, demographics, and visual symptoms in both groups.

CONCLUSIONS

People with persitent NP are more likely to present with CVS than controls. Clinicians should consider assessing visual symptoms in people presenting with persisting NP.

Retrospective Review: Effectiveness of Cervical Proprioception Retraining for Dizziness After Mild Traumatic Brain Injury in a Military Population With Abnormal Cervical Proprioception

OBJECTIVE

This study aimed to assess the outcomes of 2 treatments for patients with dizziness after mild traumatic brain injury (mTBI) who demonstrate abnormal cervical spine proprioception (CSP).

METHODS

A retrospective records review was conducted on the medical charts of patients treated for dizziness after mTBI who received either standard care (vestibular rehabilitation therapy [VRT]) or cervical spine proprioceptive retraining (CSPR) from 2009 to 2013. All patients included in the analysis were active-duty military with recurring dizziness after mTBI who had at least 1 abnormal CSP test. Patients were excluded for dizziness with a clear peripheral vestibular or central symptom origin, incomplete data, or no CSP assessment, or if both treatments were administered. Forty-eight total patients were included in the final dataset (22 VRT; 26 CSPR). Traditional VRT was compared with CSPR when abnormal CSP tests were present, regardless of the presence or absence of neck pain. A clinician review of records was used to determine improvement of dizziness based on patient reports of symptoms at discharge evaluation (ie, no symptoms for at least 2 weeks).

RESULTS

Patients who received CSPR were 30 times more likely to report improvement in dizziness symptoms compared with those who received VRT (adjusted odds ratio: 30.12; 95% confidence interval 4.44-204.26, P < .001) when abnormal CSP tests were present. Patients with dizziness over 1 year were significantly less likely to improve.

CONCLUSION

These results suggest that patients with dizziness after mTBI and who had abnormal CSP assessments responded better to CSPR compared with those who received VRT.

Comparative joint position error in patients with non-specific neck disorders and asymptomatic age-matched individuals

Background

Neck pain is a common complaint worldwide and ranked seventh in 2010 as the cause of ‘years lived with disability’ in Ghana. Proprioceptive dysfunction, measured by joint position error (JPE) tests, indicates an association with neck pain frequency, dizziness and balance problems in patients.

Objectives

To examine proprioceptive deficits of the neck using a laser pointer attached to the head.

Methods

Twenty patients within the age group 21–60 years, with at least five points on the neck disability index (NDI), and 20 age- and sex-matched controls with less than five points on the NDI were recruited for this study. The JPE was determined wearing a headlight laser pointer directed towards a Cartesian coordinate system adjusted to x/y = 0/0, placed on a wall after returning from left and right rotation, flexion and extension. From starting in an upright sitting position, facing the Cartesian coordinate system, each participant performed five repetitions for each movement direction. The mean of five repetitions for each movement direction was calculated as absolute error (AE), constant error (CE) and variable error (VE).

Results

Control participants showed larger JPE values for nearly all AE, CE and VE. After repositioning from flexion controls showed an approximately 0.6 ° larger median JPE, and the opposite for extension, with median differences between 1 ° and 2 °.

Conclusion

The results of this study do not reveal any meaningful differences between patients with mild disabled neck movement compared with controls.

Clinical implications

Joint position error testing does not seem useful for patients with mild neck disability.

Exploring the role of cervical spine endurance as a predictor of concussion risk and recovery following sports related concussion

BACKGROUND

Concussions have become a significant public health concern with rising incidence rates. Concussions have been shown to occur concurrently with neck injuries, such as whiplash-associated-disorder, therefore, understanding the role of the neck in concussions is important.

OBJECTIVES

To determine if there is a relationship between cervical muscle endurance and either concussion incidence, or concussion recovery in university athletes. Specifically, the primary aim was to investigate a relationship between pre-season deep neck flexor endurance test (DNFET) time in those who sustained an in-season injury versus those who did not. The secondary aim is to determine correlation in DNFET times and concussion recovery.

DESIGN

Longitudinal observational study.

METHODS

Pre-season DNFET was performed on university athletes. In the event of a concussion, cervical endurance and neuromuscular adaptation was re-assessed with the DNFET. Rehabilitative exercises were prescribed, as required, and DNFET was measured at subsequent treatments.

RESULTS

There was no significant difference between pre-season DNFET times and concussion incidence (p = 0.55). However, there was a moderate correlation between DNFET times and concussion recovery (R = 0.47, p = 0.001) whereby DNFET times improved predictively throughout rehabilitation.

CONCLUSIONS

While no statistically significant relationship was found between DNFET and concussion incidence, a significant clinical relationship was present with recovery. The validity of the DNFET test as a means for assessing risk or measuring recovery requires additional research.

Sensorimotor and Physiological Indicators of Impairment in Mild Traumatic Brain Injury: A Meta-Analysis

OBJECTIVE

To systematically review the literature with meta-analysis to determine whether persistence of sensorimotor or physiological impairment exists between 4 weeks to 6 months post mild traumatic brain injury (mTBI), and assign level of evidence to findings.

METHOD

The databases PubMed, pscyINFO, SPORTdiscus, Medline, CINAHL and Embase were searched from inception to November 2016 using a priori inclusion criteria. Critical appraisal was performed, and an evidence matrix established level of evidence. Meta-analysis of pooled results identified standardized mean difference (SMD) and 95% confidence intervals (95% CI) between mTBI and healthy controls for a variety of physiological and sensorimotor indicators.

RESULTS

Eighteen eligible articles, with a mean quality score of 15.67 (SD = 2.33) were included in the final review. Meta-analysis of center of motion variable; maximal mediolateral center of motion/center of pressure separation distance SMD [95% CI] approached significance at (-0.42 [-0.84, -0.00], I² = 0%) for dual task, level walking indicating a potential reduction in maximal mediolateral excursion during gait in the mTBI group compared to healthy controls. Significantly reduced variability in the standard deviation of heart beat intervals was observed in the mTBI group (-0.51 [-0.74, -0.28], I² = 0%). Overall, significant group differences in 36 sensorimotor and physiological variables (eg, balance, gait velocity and motion analysis outcomes, various oculomotor tasks, as well as heart rate variability frequency domains) were identified.

CONCLUSION

Findings demonstrate that persistence of sensorimotor and physiological changes beyond expected recovery times following subacute mTBI in an adult population is possible. These findings have implications for post-injury assessment and management.

Pathophysiology behind prolonged whiplash associated disorders: study protocol for an experimental study

BACKGROUND

There is insufficient knowledge of pathophysiological parameters to understand the mechanism behind prolonged whiplash associated disorders (WAD), and it is not known whether or not changes can be restored by rehabilitation. The aims of the projects are to investigate imaging and molecular biomarkers, cervical kinaesthesia, postural sway and the association with pain, disability and other outcomes in individuals with longstanding WAD, before and after a neck-specific exercise intervention. Another aim is to compare individuals with WAD with healthy controls.

METHODS

Participants are a sub-group (n = 30) of individuals recruited from an ongoing randomized controlled study (RCT). Measurements in this experimental prospective study will be carried out at baseline (before intervention) and at a three month follow-up (end of physiotherapy intervention), and will include muscle structure and inflammation using magnetic resonance imaging (MRI), brain structure and function related to pain using functional MRI (fMRI), muscle function using ultrasonography, biomarkers using samples of blood and saliva, cervical kinaesthesia using the "butterfly test" and static balance test using an iPhone app. Association with other measures (self-reported and clinical measures) obtained in the RCT (e.g. background data, pain, disability, satisfaction with care, work ability, quality of life) may be investigated. Healthy volunteers matched for age and gender will be recruited as controls (n = 30).

DISCUSSION

The study results may contribute to the development of improved diagnostics and improved rehabilitation methods for WAD.

TRIAL REGISTRATION

Clinicaltrial.gov Protocol ID: NCT03664934, initial release 09/11/2018.

Neck Injury Comorbidity in Concussion-Related Emergency Department Visits: A Population-Based Study of Sex Differences Across the Life Span

Background: The cervical spine region can be especially vulnerable to concurrent injury in concussion, with research suggesting that females may be at greater risk due to their weaker and anatomically distinct necks. The main objective of our research was to study sex differences in the rate of neck injury comorbidity across the life span among patients with a concussion diagnosis in the emergency department (ED) setting, by cause of injury (motor vehicle collisions [MVC] and sports).

Materials and Methods: All patients with a first concussion-related ED visit between fiscal years 2002/2003 and 2011/2012 (inclusive) in Ontario were identified in population-based health administrative data using the International Statistical Classification of Diseases and Related Health Problems, Tenth Revision, Canada (ICD-10-CA) codes. Age-dependent odds ratios of comorbid neck injury for sex were estimated using polynomial multivariable logistic regression models, adjusting for sociodemographic characteristics.

Results: Females with a concussion had significantly higher odds of sustaining a comorbid neck injury between the ages of 5–49 years for all concussion-related ED visits, 15–49 years for MVC-related concussion ED visits, and 10–39 years for sports-related concussion ED visits, holding all other covariates in the model constant.

Conclusions: These results support the consideration of increased screening for comorbid neck injuries, particularly for females, to allow for early intervention. Furthermore, the increased risk of comorbid neck injury in females with a concussion-related ED visit was age-dependent, with the interaction between sex and age following a nonlinear trend. As such, future studies on concussions should consider linear and nonlinear sex and age interactions.

Acupuncture for treating whiplash-associated disorder: A systematic review and meta-analysis protocol

BACKGROUND

This review aims to evaluate the effectiveness and safety of acupuncture treatment for patients with whiplash-associated disorder (WAD).

METHODS

We will search the following databases from their inception to October 2018: MEDLINE, Embase, the Cochrane Central Register of Controlled Trials, the Cumulative Index to Nursing and Allied Health Literature, the Allied and Complementary Medicine Database, 1 Chinese database (China National Knowledge Infrastructure), 1 Japanese database (Japan Science and Technology Information Aggregator, Electronic), and 5 Korean databases (KoreaMed, Research Information Service System, Korean Studies Information Service System, Database Periodical Information Academic, and Oriental Medicine Advanced Searching Integrated System). All randomized controlled trials of acupuncture for WAD will be considered for inclusion without language restrictions. The risk of bias will be assessed using the Cochrane risk of bias tool. The mean difference or standard mean difference for continuous data and risk ratio for dichotomous data will be calculated with 95% confidence intervals.

DISSEMINATION

The results of this review will be disseminated through peer-reviewed journal articles or conference presentations, and may provide important guidance for clinicians and patients regarding the use of acupuncture treatment for treating WAD.

TRIAL REGISTRATION NUMBER

PROSPERO 2018: CRD42018106964.

Active Rehabilitation of Concussion and Post-concussion Syndrome

Concussion is a physiological brain injury with physical, cognitive, and emotional sequelae. The macrophysiological insult to the brain affects the autonomic nervous system and its control of cerebral blood flow. Most patients recover within 2 weeks, but some do not. Persistence of symptoms beyond the generally accepted time frame for recovery is called post-concussion syndrome (PCS). PCS is not a single entity; it is a group of disorders that requires specific forms of therapy. Rest has been the mainstay of the treatment for concussion and PCS. This article discusses the rationale for the active treatment of concussion and PCS.

The qualitative grading of muscle fat infiltration in whiplash using fat and water magnetic resonance imaging

BACKGROUND CONTEXT

The development of muscle fat infiltration (MFI) in the neck muscles is associated with poor functional recovery following whiplash injury. Custom software and time-consuming manual segmentation of magnetic resonance imaging (MRI) is required for quantitative analysis and presents as a barrier for clinical translation.

PURPOSE

The purpose of this work was to establish a qualitative MRI measure for MFI and evaluate its ability to differentiate between individuals with severe whiplash-associated disorder (WAD), mild or moderate WAD, and healthy controls.

STUDY DESIGN/SETTING

This is a cross-sectional study.

PATIENT SAMPLE

Thirty-one subjects with WAD and 31 age- and sex-matched controls were recruited from an ongoing randomized controlled trial.

OUTCOME MEASURES

The cervical multifidus was visually identified and segmented into eighths in the axial fat/water images (C4-C7). Muscle fat infiltration was assessed on a visual scale: 0 for no or marginal MFI, 1 for light MFI, and 2 for distinct MFI. The participants with WAD were divided in two groups: mild or moderate and severe based on Neck Disability Index % scores.

METHODS

The mean regional MFI was compared between the healthy controls and each of the WAD groups using the Mann-Whitney U test. Receiver operator characteristic (ROC) analyses were carried out to evaluate the validity of the qualitative method.

RESULTS

Twenty (65%) patients had mild or moderate disability and 11 (35%) were considered severe. Inter- and intra-rater reliability was excellent when grading was averaged by level or when frequency of grade II was considered. Statistically significant differences (p<.05) in regional MFI were particularly notable between the severe WAD group and healthy controls. The ROC curve, based on detection of distinct MFI, showed an area-under-the curve of 0.768 (95% confidence interval 0.59-0.94) for discrimination of WAD participants.

CONCLUSIONS

These preliminary results suggest a qualitative MRI measure for MFI is reliable and valid, and may prove useful toward the classification of WAD in radiology practice.

Neck-specific exercises with internet-based support compared to neck-specific exercises at a physiotherapy clinic for chronic whiplash-associated disorders: study protocol of a randomized controlled multicentre trial

Background

Globally, neck pain is the fourth most common condition associated with longer periods of living with disability. Annually, approximately 0.3% of the population of Western countries undergo whiplash trauma, and half of those individuals will develop chronic problems with high costs for the individual and society. Evidence for chronic whiplash-associated disorders (WAD) treatment is scarce, though neck-specific training at a physiotherapy clinic twice a week for 12 weeks has demonstrated good results. More efficient, flexible rehabilitation with reduced waiting times and lower costs is needed, ideally replacing lengthy on-site treatment series by healthcare providers. Internet-based care has been shown to be a viable alternative for a variety of diseases and interventions, but studies are lacking on Internet-based interventions for individuals with chronic neck problems. The aim of the trial described here is to compare the effects of an Internet-based neck-specific exercise programme to the same exercises performed at a physiotherapy clinic in regards to self-reported and clinical measures, as well as cost-effectiveness.

Methods

This prospective, randomized controlled trial will involve 140 participants. Measurements will be made at baseline, 3 months (end of treatment), and 15 months (12 months after end of intervention) and will include ratings of pain, disability, satisfaction with care, work ability, quality of life, and cost-effectiveness.

Discussion

The study results may contribute to the development of a more effective rehabilitation, flexible and equal care, shorter waiting times, increased availability, and lower costs for healthcare and society.

Trial registration

ClinicalTrials.gov Protocol ID: NCT03022812, initial release 12/20/2016.

Dizziness, Unsteadiness, Visual Disturbances, and Sensorimotor Control in Traumatic Neck Pain

Synopsis There is considerable evidence to support the importance of cervical afferent dysfunction in the development of dizziness, unsteadiness, visual disturbances, altered balance, and altered eye and head movement control following neck trauma, especially in those with persistent symptoms. However, there are other possible causes for these symptoms, and secondary adaptive changes should also be considered in differential diagnosis. Understanding the nature of these symptoms and differential diagnosis of their potential origin is important for rehabilitation. In addition to symptoms, the evaluation of potential impairments (altered cervical joint position and movement sense, static and dynamic balance, and ocular mobility and coordination) should become an essential part of the routine assessment of those with traumatic neck pain, including those with concomitant injuries such as concussion and vestibular or visual pathology or deficits. Once adequately assessed, appropriate tailored management should be implemented. Research to further assist differential diagnosis and to understand the most important contributing factors associated with abnormal cervical afferent input and subsequent disturbances to the sensorimotor control system, as well as the most efficacious management of such symptoms and impairments, is important for the future. J Orthop Sports Phys Ther 2017;47(7):492-502. Epub 16 Jun 2017. doi:10.2519/jospt.2017.7052.

The Role of Exercise and Patient Education in the Noninvasive Management of Whiplash

Synopsis The majority of people with whiplash-associated disorder do not have neurological deficit or fracture and are therefore largely managed with nonsurgical interventions such as exercise, patient education, and behavioral-based interventions. To date, clinical guidelines, systematic reviews, and the results of high-quality randomized controlled trials recommend exercise and patient education as the primary interventions for people in both acute and chronic stages after injury. However, the relatively weak evidence and small effect sizes in individual trials have led authors of some systematic reviews to reach equivocal recommendations for either exercise or patient education, and led policy makers and funders to question whether the more expensive intervention (exercise) should be funded at all. Physical therapists, one of the most commonly consulted professionals treating individuals with whiplash-associated disorder, need to look beyond the evidence for insights as to what role patient education and exercise should play in the future management of whiplash. This clinical commentary therefore will review the evidence for exercise, patient education, and behavioral-based interventions for whiplash and provide clinical insight as to the future role that exercise and patient education should play in the management of this complex condition. Possible subgroups of patients who may best respond to exercise will be explored using stratification based on impairments, treatment response, and risk/prognostic factors. J Orthop Sports Phys Ther 2017;47(7):481-491. Epub 16 Jun 2017. doi:10.2519/jospt.2017.7138.

Eye stabilization reflexes in traumatic and non-traumatic chronic neck pain patients

BACKGROUND

Many chronic neck pain patients experience problems with vision. These problems are possibly induced by deviations of the eye stabilization reflexes. It is not known whether these eye reflex alterations occur both in traumatic and non-traumatic neck pain patients.

OBJECTIVE

To investigate if the cervico-ocular reflex (COR) and the vestibulo-ocular reflex (VOR) are changed in tertiary care patients with prolonged, chronic neck pain with various origin of complaints.

DESIGN

Cross sectional study.

METHODS

Ninety-one chronic neck pain patients were subdivided into three groups by origin of complaints, and compared with healthy controls. COR and VOR gains were measured with an infrared eye tracking device with the subject sitting on a rotating chair in a darkened room and with the head fixed.

RESULTS

Neck pain patients had a higher COR gain (median 0.41, IQR 0.289) compared with healthy controls (median 0.231, IQR 0.179). The mean COR gain did not differ between the three patient groups (Whiplash Associated Disorders 0.444 (SD 0.221); traumatic 0.397 (SD0.205); non-traumatic 0.468 (SD0.236)). There was no difference in VOR gain between the groups.

CONCLUSION

Chronic neck pain patients, who already received primary care, still have an elevated cervico-ocular reflex. The origin of complaints did not seem to be associated with this deviant oculomotor behavior.

Use of neck torsion as a specific test of neck related postural instability

BACKGROUND

Disturbed postural stability in neck pain (NP) is likely due to abnormal cervical afferent function. Several potential causes requires specific diagnostic tests. The neck torsion (head still body rotated) manoeuvre stimulates cervical but not vestibular receptors and identified abnormal cervical afferent input as the cause in patients with NP compared to healthy controls. Comparison between vestibular and NP subjects is now needed.

AIMS

To compare individuals with unilateral vestibular loss (UVL), persistent NP and asymptomatic controls. It was hypothesized that neck torsion will increase postural stability in NP compared to both the asymptomatic and UVL groups.

METHODS

Twenty UVL, 20 persistent NP and 20 asymptomatic control subjects underwent measurement of postural stability on a computerised force plate with eyes closed in comfortable stance under 5 conditions: neutral head, head rotated 45° (left and right) and neck torsion (left and right). Root mean square (rms) amplitude of sway was measured in the anterior posterior (AP) and medial lateral (ML) directions. Average torsion and torsion difference (average torsion - neutral neck) were calculated.

RESULTS

NP subjects had significantly greater (p < 0.05) AP sway with average torsion and torsion difference compared to both control and UVL. There were no significant differences between control and UVL and no between group differences for neutral neck, rotation or rotation difference.

CONCLUSION

The results of the study suggest that the torsion manouever may identify cervical afferent causes of disturbed postural stability. This is important for guiding assessment and management of balance disturbances in patients.

Clinical characteristics and outcomes of treatment of the cervical spine in patients with persistent post-concussion symptoms: A retrospective analysis

BACKGROUND

Concussion is typically defined as a mild brain injury, and yet the brain is unlikely to be the only source of persistent post-concussion symptoms. Concurrent injury to the cervical spine in particular is acknowledged as a potential source of common persistent symptoms such as headache, dizziness and neck pain.

OBJECTIVES

To describe the cervical spine findings and outcomes of treatment in a series of patients with persistent post-concussion symptoms, and describe the clinical characteristics of a cervicogenic component when it is present.

DESIGN

Retrospective chart review of a consecutive series of patients with concussion referred to a physiotherapist for cervical spine assessment.

METHOD

Patient charts for all patients over a calendar year referred by a concussion service provider to a physiotherapist for cervical spine assessment were de-identified and transferred to the research team. Clinical data were independently extracted by two research assistants and analysed using descriptive statistics.

RESULTS/FINDINGS

Data were analysed from 46 patient charts. Those with a cervicogenic component (n = 32) were distinguished from those without a cervicogenic component (n = 14) by physical examination findings, particularly pain on manual segmental examination. Physiotherapy treatment of the cervicogenic component (n = 21) achieved improvements in function (mean increase of 3.8 in the patient-specific functional scale), and pain (mean decrease of 4.6 in the numeric pain-rating scale).

CONCLUSIONS

The clinical characteristics described give preliminary support to the idea that the cervical spine may contribute to persistent post-concussion symptoms, and highlight the value of physiotherapy assessment and treatment of the cervical spine following a concussive injury.

Cervical spine reposition errors after cervical flexion and extension

BACKGROUND

Upright head and neck position has been frequently applied as baseline for diagnosis of neck problems. However, the variance of the position after cervical motions has never been demonstrated. Thus, it is unclear if the baseline position varies evenly across the cervical joints. The purpose was to assess reposition errors of upright cervical spine.

METHODS

Cervical reposition errors were measured in twenty healthy subjects (6 females) using video-fluoroscopy. Two flexion movements were performed with a 20 s interval, the same was repeated for extension, with an interval of 5 min between flexion and extension movements. Cervical joint positions were assessed with anatomical landmarks and external markers in a Matlab program. Reposition errors were extracted in degrees (initial position minus reposition) as constant errors (CEs) and absolute errors (AEs).

RESULTS

Twelve of twenty-eight CEs (7 joints times 4 repositions) exceeded the minimal detectable change (MDC), while all AEs exceeded the MDC. Averaged AEs across the cervical joints were larger after 5 min' intervals compared to 20 s intervals (p < 0.05).

CONCLUSIONS

This is the first study to demonstrate single joint reposition errors of the cervical spine. The cervical spine returns to the upright positions with a 2° average absolute difference after cervical flexion and extension movements in healthy adults.

A Practical Concussion Physical Examination Toolbox

CONTEXT

With heightened awareness of concussion, there is a need to assess and manage the concussed patient in a consistent manner. Unfortunately, concussion physical examination has not been standardized or supported by evidence. Important questions remain about the physical examination.

EVIDENCE ACQUISITION

Review of ClinicalKey, Cochrane, MEDLINE, and PubMed prior to July 2015 was performed using search terms, including concussion, mTBI, physical examination, mental status, cranial nerves, reflexes, cervical, vestibular, and oculomotor. The references of the pertinent articles were reviewed for other relevant sources.

STUDY DESIGN

Clinical review.

LEVEL OF EVIDENCE

Level 3.

RESULTS

The pertinent physical examination elements for concussion include evaluation of cranial nerves, manual muscle testing, and deep tendon reflexes; inspecting the head and neck for trauma or tenderness and cervical range of motion; Spurling maneuver; a static or dynamic balance assessment; screening ocular examination; and a mental status examination that includes orientation, immediate and delayed recall, concentration, mood, affect, insight, and judgment. Other examination elements to consider, based on signs, symptoms, or clinical suspicion, include testing of upper motor neurons, cervical strength and proprioception, coordination, pupillary reactivity, and visual acuity; examination of the jaw, temporomandibular joint, and thoracic spine; fundoscopic evaluation; orthostatic vital signs; assessment of dynamic visual acuity; and screening for depression, anxiety, substance abuse disorders, and preinjury psychiatric difficulties.

CONCLUSION

Various elements of the physical examination, such as screening ocular examination, cervical musculoskeletal examination, static and/or dynamic balance assessment, and mental status examination, appear to have utility for evaluating concussion; however, data on validity are lacking.

An Attempt of Early Detection of Poor Outcome after Whiplash

The main concern with whiplash is that a large proportion of whiplash patients experience disabling symptoms or whiplash-associated disorders (WAD) for months if not years following the accident. Therefore, identifying early prognostic factors of WAD development is important as WAD have widespread clinical and economic consequences. In order to tackle that question, our study was specifically aimed at combining several methods of investigation in the same WAD patients at the acute stage and 6 months later. Our longitudinal, open, prospective, multi-center study included 38 whiplash patients, and 13 healthy volunteers matched for age, gender, and socio-economic status with the whiplash group. Whiplash patients were evaluated 15-21 days after road accident, and 6 months later. At each appointment, patients underwent a neuropsychological evaluation, a full clinical neurological examination, neurophysiological and postural tests, oto-neurological tests, cervical spine cord magnetic resonance imaging (MRI) with tractography (DTI). At 6 months, whiplash patients were categorized into two subgroups based on the results of the Diagnostic and Statistical Manual of Mental Disorders as having either favorable or unfavorable progression [an unfavorable classification corresponding to the presence of post-concussion symptom (PCS)] and we searched retrospectively for early prognostic factors of WAD predicting the passage to chronicity. We found that patients displaying high level of catastrophizing at the acute stage and/or post-traumatic stress disorder associated with either abnormalities in head or trunk kinematics, abnormal test of the otolithic function and at the Equitest or a combination of these syndromes, turned to chronicity. This study suggests that low-grade whiplash patients should be submitted as early as possible after the trauma to neuropsychological and motor control tests in a specialized consultation. In addition, they should be evaluated by a neuro-otologist for a detailed examination of vestibular functions, which should include cervical vestibular evoked myogenic potential. Then, if diagnosed at risk of WAD, these patients should be subjected to an intensive preventive rehabilitation program, including vestibular rehabilitation if required.

Cervico-ocular Reflex Is Increased in People With Nonspecific Neck Pain

BACKGROUND

Neck pain is a widespread complaint. People experiencing neck pain often present an altered timing in contraction of cervical muscles. This altered afferent information elicits the cervico-ocular reflex (COR), which stabilizes the eye in response to trunk-to-head movements. The vestibulo-ocular reflex (VOR) elicited by the vestibulum is thought to be unaffected by afferent information from the cervical spine.

OBJECTIVE

The aim of the study was to measure the COR and VOR in people with nonspecific neck pain.

DESIGN

This study utilized a cross-sectional design in accordance with the STROBE statement.

METHODS

An infrared eye-tracking device was used to record the COR and the VOR while the participant was sitting on a rotating chair in darkness. Eye velocity was calculated by taking the derivative of the horizontal eye position. Parametric statistics were performed.

RESULTS

The mean COR gain in the control group (n=30) was 0.26 (SD=0.15) compared with 0.38 (SD=0.16) in the nonspecific neck pain group (n=37). Analyses of covariance were performed to analyze differences in COR and VOR gains, with age and sex as covariates. Analyses of covariance showed a significantly increased COR in participants with neck pain. The VOR between the control group, with a mean VOR of 0.67 (SD=0.17), and the nonspecific neck pain group, with a mean VOR of 0.66 (SD=0.22), was not significantly different.

LIMITATIONS

Measuring eye movements while the participant is sitting on a rotating chair in complete darkness is technically complicated.

CONCLUSIONS

This study suggests that people with nonspecific neck pain have an increased COR. The COR is an objective, nonvoluntary eye reflex and an unaltered VOR. This study shows that an increased COR is not restricted to patients with traumatic neck pain.

Novel insights into the interplay between ventral neck muscles in individuals with whiplash-associated disorders

Chronic whiplash-associated disorder (WAD) is common after whiplash injury, with considerable personal, social, and economic burden. Despite decades of research, factors responsible for continuing pain and disability are largely unknown, and diagnostic tools are lacking. Here, we report a novel model of mechanical ventral neck muscle function recorded from non-invasive, real-time, ultrasound measurements. We calculated the deformation area and deformation rate in 23 individuals with persistent WAD and compared them to 23 sex- and age-matched controls. Multivariate statistics were used to analyse interactions between ventral neck muscles, revealing different interplay between muscles in individuals with WAD and healthy controls. Although the cause and effect relation cannot be established from this data, for the first time, we reveal a novel method capable of detecting different neck muscle interplay in people with WAD. This non-invasive method stands to make a major breakthrough in the assessment and diagnosis of people following a whiplash trauma.

Risk Factors for Prolonged Treatment of Whiplash-Associated Disorders

OBJECTIVES

Whiplash-associated disorders (WAD) are the most common injuries that are associated with car collisions in Japan and many Western countries. However, there is no clear evidence regarding the potential risk factors for poor recovery from WAD. Therefore, we used an online survey of the Japanese population to examine the association between potential risk factors and the persistence of symptoms in individuals with WAD.

MATERIALS AND METHODS

An online survey was completed by 127,956 participants, including 4,164 participants who had been involved in a traffic collision. A random sample of the collision participants (n = 1,698) were provided with a secondary questionnaire. From among the 974 (57.4%) respondents to the secondary questionnaire, we selected 183 cases (intractable neck pain that was treated over a period of 6 months) and 333 controls (minor neck pain that was treated within 3 months). Multivariable logistic regression analysis was used to evaluate the potential risk factors for prolonged treatment of WAD.

RESULTS

Female sex, the severity of the collision, poor expectations of recovery, victim mentality, dizziness, numbness or pain in the arms, and lower back pain were associated with a poor recovery from WAD.

CONCLUSIONS

In the present study, the baseline symptoms (dizziness, numbness or pain in the arms, and lower back pain) had the strongest associations with prolonged treatment for WAD, although the psychological and behavioral factors were also important. These risk factors should be considered when evaluating patients who may have the potential for poor outcomes.

[Expert evidence in whiplash injury: interdisciplinary orthopaedic and biomechanical approach]

Considering the controversially discussed issue of whiplash injury a pragmatic approach based on our own experience in the area of forensic expert opinion is presented. Findings of accident analysis and biomechanics are correlated with the individual situation after the accident (initial clinical appearance), the course of the ailment and the indispensable physical examination. The latter leads to determination of the individual vulnerability (not increased/increased) which is important for the evaluation of the physical condition and estimation of the physical stress limit. These limits vary widely between individuals and must be considered carefully when relating dose and effect of accident severity to a possible physical injury. Determination of the accident severity is especially important when there are no objective signs of injury and the existence of a minor whiplash injury (Quebec Task Force degree 1 or 2) is in question.