Brain Concussion, Mild Traumatic Brain Injury
Conditions
Keywords
Heart rate variability, Self-efficacy, Pediatrics, Mindfulness-based yoga, Symptoms
Brief summary
Mild traumatic brain injury (mTBI), also known as concussion, is of great concern in the youth population, with incidences of injury steadily increasing within the past few years. Current Canadian estimates have indicated that the total rate of concussions per 100,000 increased from 467 to 754 for boys and from 209 to 441 for girls from 2003-2010. As defined by the recent Zurich Consensus statement, concussion is a pathophysiological injury induced by biomechanical forces, which can be caused by impact to the head, neck or body. In 10-20% of youth, concussion symptoms persist in the weeks, months or even years following the injury. Consequently, youth with persistent concussion symptoms are unable to fully participate in the meaningful activities (e.g. attending school, engaging with friends and community) they did prior to the injury and experience a reduced quality of life. Persistent concussion symptoms in youth requires an approach that directly addresses the rumination and attention to distressful thoughts about their functional performance, while still promoting appropriate levels of physical and cognitive demands. Targeting these constructs may shift the focus away from symptoms, while building self-efficacy and enhancing participation in daily activities. Mindfulness-based yoga (MBY) is a mind-body intervention that uses physical yoga poses, purposeful breathing techniques and a focus on being in the present moment. MBY encourages participants to develop moment-to-moment awareness of physical sensations, emotions, and thoughts, and promotes the cultivation of non-judgemental and accepting relationships to personal experiences. In chronic pain, fibromyalgia, mental health and now TBI populations, MBY has demonstrated benefits in physical (i.e. increased muscle strength, endurance), psychological (i.e. decreased stress, increased self-efficacy), cognitive (i.e. increased concentration) and social (i.e. emotional regulation, improved mood) domains. Although mindfulness based yoga has been validated as a form of rehabilitation in the adult population, its applicability for youth with persistent concussion symptoms has yet to be explored. Understanding the impact of a MBY intervention on this population may enhance management of persistent symptoms and ultimately, participation in meaningful activities. In addition to the functional sequelae that ensue following this injury, concussion in both the acute and persistent phases is being recognized as a neurophysiological injury. Traditional methods of assessment following concussion place emphasis on subjective self-report and administration of neuropsychological batteries. These assessments are used in an effort to return the youth to activity (i.e school, sport). However, these methods can be unreliable as youth have a high incentive to return to play and neurocognitive resolution does not necessarily equate to pre-injury function. To augment these measures, an objective indicator of neurophysiological stress is needed. Heart rate variability (HRV) is an objective, neurophysiological indicator of autonomic nervous system functioning. HRV is quantified by measuring the time intervals between heartbeats. Increased variability in heart rate (i.e. increased HRV) is seen as healthy neurophysiological function, demonstrating an individual's ability to adapt and be flexible to the demands of the environment. Conversely, decreased HRV is demonstrative of an individual's reduced ability to respond flexibly to their environment. Investigating the impact of persistent concussion symptoms on HRV has the potential to enhance our understanding of autonomic nervous system functioning in the chronic phases of this injury for an understudied population. The specific objectives are to: (1) adapt the MBY intervention protocol to suit the unique needs of youth with mTBI (i.e. safety, fatigue), (2) collect data on the impact of MBY on HRV, self-efficacy and participation, (3) describe changes in HRV, self-efficacy and participation associated with MBY across pre-intervention, post-intervention and 3 months following intervention, (4) identify if post concussion symptoms change (i.e. increase or decrease) following MBY and (5) identify if changes in post concussion symptoms occur with changes in HRV, self-efficacy and participation.
Interventions
BEHAVIORALMindfulness-based Yoga Arm
Sponsors
Canadian Institutes of Health Research (CIHR)
Holland Bloorview Kids Rehabilitation Hospital
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
13 Years to 18 Years
Healthy volunteers
No
Inclusion criteria
* Youth between 13-18 years old; * Persistent concussion symptoms greater than 1 month.
Exclusion criteria
* Less than 13 years old or greater than 18 years old; * Non-English speaking; * Severe (unmanaged) psychiatric diagnosis; * Neurological disease; * Diagnosed cardiac issues.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change in Children's Assessment of Participation and Employment (CAPE) from pre-intervention to 3 month follow-up | Pre-intervention, post-intervention (within 1 week following 8-week intervention), 3 month follow-up | Participants are asked to complete the 55-item questionnaire and answer questions about an activity based on five dimensions of participation: diversity (number of activities done), intensity, (with whom the youth does an activity with), where (they do it) and enjoyment of activities (King et al., 2007). |
| Change in Self-Efficacy Questionnaire for Children (SEQ-C) from pre-intervention to 3 month follow-up | Pre-intervention, post-intervention (within 1 week following 8-week intervention), 3 month follow-up | Participants are asked to rate their perceived ability to accomplish a task between 1 (not at all) to 5 (very well). The questions cover three domains of self-efficacy, namely social, academic and emotional. |
| Change in Heart rate variability from pre-intervention to 3 month follow-up | Pre-intervention, during each of the 8 weeks of mindfulness-based yoga (for 24 hours starting at 6PM when each of the yoga sessions begins until 6PM the following day), post-intervention (within 1 week following 8-week intervention), 3 month follow-up | Time (seconds) of beat-to-beat intervals, measured over a 24 hour recording |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Post-Concussion Symptom Inventory (PCSI) | Pre-intervention, post-intervention (within 1 week following 8-week intervention), 3 month follow-up | It is a 21-item self-report measure where symptom severity is rated on a scale of 0 to 6 (0= not at all, 3= moderate, 6=severe) for symptoms that occur within physical, cognitive, fatigue and emotional domains |
| Godin Leisure-Time Exercise Questionnaire (GLTE) | Pre-intervention, post-intervention (within 1 week following 8-week intervention), 3 month follow-up | It is a self-report measure that assesses weekly physical activity engagement by asking participants to indicate how many times per week they engage in strenuous (heart beats rapidly), moderate (not exhausting) or mild exercise (minimal effort). |
Countries
Canada
Outcome results
None listed