Pcs and Brain Fog
Guideline: CDC HEADS UP clinical guidance (updated 2025); Ontario Neurotrauma Foundation guidelines
Medically reviewed by Dr. Alexandru-Theodor Amarfei, M.D.
First published
Quick Answer
Pcs can contribute to brain fog. The most useful clues are the symptom pattern, nearby overlaps, and whether the mechanism described here matches your story: Post-concussion syndrome - persistent cognitive symptoms after head injury.
Mechanism overlap
Mechanisms this cause often overlaps with
These are explanation lenses, not diagnosis certainty. If this cause fits, these mechanisms can help explain why the pattern looks the way it does.
structural vestibular load
Structural or Vestibular Load
Cervical strain, vestibular dysfunction, post-concussion effects, or positional head/neck load can distort clarity, orientation, and stamina.
What would weaken it: No positional or motion sensitivity.
When to expect improvement
2-4 weeks
If no improvement after this timeframe, it's worth exploring other possibilities.
Is Pcs Brain Fog Reversible?
Post-concussion brain fog is reversible in most cases. The vast majority of concussions resolve within 2-4 weeks. Persistent post-concussion syndrome (>3 months) affects 10-30% and often responds to targeted rehabilitation. Early aerobic exercise accelerates recovery.
Cause Visual
PCS Pattern Map
Pattern-focused visual for PCS with mechanism, timing, action, and clinician discussion cues.
How Pcs Disrupts Clear Thinking
PCS-related fog often feels stimulus-sensitive, head-pressure-sensitive, and effort-limited after concussion rather than like a general unexplained decline.
What this pattern often feels like
These community-grounded clues are here to help you recognize the shape of the pattern. They are not a diagnosis.
PCS-related fog usually presents as a post-injury, stimulus-sensitive pattern with head pressure, vestibular, visual, or effort-limited features.
Differentiator question: Did the fog begin after head injury and worsen with screens, motion, visual load, or overdoing it?
PCS may be central, but cervical strain, migraine, vestibular dysfunction, sleep loss, and autonomic symptoms often maintain the same pattern.
Pcs Brain Fog Symptoms: How It Usually Shows Up
These are pattern signals, not proof by themselves. Use them to guide what to measure, compare, and discuss next.
Pcs can present with morning-heavy fog when sleep or overnight physiology is relevant.
Post-meal worsening can strengthen Pcs when metabolic or inflammatory triggers are involved.
Post-exertional worsening can increase confidence for Pcs when recovery capacity is reduced.
What to Try This Week for Pcs
- 1
Start graded aerobic exercise using the Buffalo Concussion Treadmill Test protocol: walk on treadmill increasing 1mph every 2 minutes until symptoms increase. Your symptom-free threshold is your exercise prescription. Stay below it. Increase by 5-10% weekly. A 2019 Lancet Child & Adolescent Health RCT confirmed early aerobic exercise ACCELERATES recovery from concussion.
Start with one high-yield change before adding complexity.
- 4
Drink a glass of water now. Keep a bottle visible. Aim for pale yellow urine. Don't overthink it - just drink regularly.
Weekly focus: Hydration.
- 5
Open a window for 15 minutes. Fresh air exchange reduces indoor pollutants. If outdoors is bad (pollution, pollen), use a HEPA filter.
Weekly focus: Environment.
- 6
Reach out to one person today. Text, call, walk together. Isolation worsens every cause of brain fog. Connection is a biological need, not a luxury.
Weekly focus: Connection.
- 7
Rate your brain fog 1-10 each morning for 7 days. Note sleep quality, food, exercise, stress. Patterns emerge within a week.
Weekly focus: Tracking.
Is Pcs Brain Fog Reversible?
Post-concussion brain fog is reversible in most cases. The vast majority of concussions resolve within 2-4 weeks. Persistent post-concussion syndrome (>3 months) affects 10-30% and often responds to targeted rehabilitation. Early aerobic exercise accelerates recovery.
Typical timeline: Most concussions: 80% recover within 2-4 weeks. Persistent PCS: may take 3-12 months with active rehabilitation. Very prolonged cases (years): often have treatable components (vestibular, cervical, autonomic, psychological).
Factors that affect recovery:
- Time to initiation of aerobic exercise (earlier = better outcomes)
- Identification of specific deficits (vestibular, cervical, oculomotor)
- Prior concussion history (increases recovery time)
- Psychological factors (anxiety, depression, fear-avoidance)
- Sleep quality (poor sleep delays recovery)
Source: Leddy et al., Lancet Child Adolesc Health, 2019; Schneider et al., BMJ, 2014
Food Approach
Primary Option
Mediterranean / MIND Pattern
The most evidence-backed eating pattern for brain health. Not a diet - a way of eating.
Leafy greens daily, berries 3-5x/week, fatty fish 2-3x/week, olive oil as main fat, nuts/seeds daily, legumes 3-4x/week, whole grains. Minimal ultra-processed food, refined sugar, and seed oils.
Omega-3 (fatty fish 2-3x/week) supports neuronal membrane repair. Adequate protein for brain tissue recovery. Anti-inflammatory pattern. Don't restrict calories during brain recovery. Hydrate well - dehydration worsens post-concussion symptoms.
Open primary diet pattern →Alternative Options
Gentle Anti-Inflammatory (Recovery-Adapted)
For people who are too fatigued, nauseous, or overwhelmed for complex dietary changes. The minimum effective dose.
Small, frequent, simple meals. Broth/soup if appetite is poor. Add ONE portion of oily fish per week. Add berries when tolerable. Reduce (don't eliminate) ultra-processed food. Hydrate. Don't force large meals.
Open this option →Iron-Repletion Focus
For confirmed or suspected iron deficiency. Pair iron-rich foods with vitamin C. Separate from tea/coffee/dairy.
Iron-rich foods: red meat 2-3x/week, liver 1x/week (if tolerated), lentils, spinach, fortified cereals. ALWAYS pair with vitamin C (bell pepper, orange, kiwi, strawberry). Avoid tea/coffee within 1hr of iron-rich meals. Continue prenatal vitamins if postpartum.
Open this option →How to Talk to Your Doctor About Pcs and Brain Fog
Suggested Script
"I want to systematically evaluate whether Pcs is contributing to my brain fog and compare it against close alternatives."
Tests To Discuss
- • Post-Concussion Investigation
Differentiator Questions
- • Does your pattern fit Pcs more consistently than Anxiety when timing, triggers, and recovery are compared side-by-side?
- • Does your pattern fit Pcs more consistently than Migraine when timing, triggers, and recovery are compared side-by-side?
- • Does your pattern fit Pcs more consistently than Pain when timing, triggers, and recovery are compared side-by-side?
- • When symptoms flare, do they reliably occur 1-3 hours after meals and improve when meal composition changes?
Quiet next step
Get the doctor handout for this pattern
Get the printable doctor handout for this pattern and keep the next steps in one place. No funnel, just the handout and a quiet email reminder if you want it.
How Pcs Brain Fog Connects Across The Site
Protocol Guides
Clarity Code Factors
- Neural Disconnection
Post-injury, post-viral, or structural pathways can reduce network efficiency despite normal routine scans.
- Inflammation
Systemic or neuroinflammatory load can reduce processing speed, increase fatigue, and worsen symptom volatility.
Quick Summary: Pcs Brain Fog Key Points
Informative- 1
PCS-related fog often feels stimulus-sensitive, head-pressure-sensitive, and effort-limited after concussion rather than like a general unexplained decline.
- 2
Worse in the morning: Pcs can present with morning-heavy fog when sleep or overnight physiology is relevant.
- 3
After-meal worsening: Post-meal worsening can strengthen Pcs when metabolic or inflammatory triggers are involved.
- 4
Worse after exertion: Post-exertional worsening can increase confidence for Pcs when recovery capacity is reduced.
- 5
Story language directly matches a recurring Pcs pattern rather than broad fatigue alone.
- 6
Symptoms recur with a repeatable trigger/timing pattern that is physiologically plausible for Pcs.
- 7
Context clues (history, exposures, or coexisting conditions) support Pcs as a priority hypothesis.
- 8
At least two independent signals point in the same direction without strong contradiction.
- 9
Response to relevant interventions tracks closer with Pcs than with Anxiety.
- 10
A competing cause (Anxiety) has stronger direct evidence in the story.
Metabolic Lens
Secondary overlapThis cause can overlap with metabolic-pattern brain fog. Distinguish by timing, trigger profile, and objective context before narrowing to one explanation.
- Fog episodes that cluster in repeatable timing windows (meal, exertion, posture, or sleep-pattern linked).
- Energy or clarity drops that feel abrupt rather than uniformly low all day.
- Symptom overlap with sleep, autonomic, anxiety, or medication factors.
These pattern clues can raise suspicion but are not diagnostic on their own; confirmation requires clinician-guided evaluation and objective data.
13 Evidence-Based Insights About Pcs and Brain Fog
Your MRI is normal but you can't think. That's because concussions are FUNCTIONAL injuries, not structural ones - they don't show on standard imaging. The old advice was 'rest until better.' The new evidence says controlled exercise SPEEDS recovery. There's almost always something treatable.
Evidence grades: A = strong human evidence, B = moderate evidence, C = preliminary or small-study evidence. Full grading guide
1 THE SYMPTOM-FREE HEART RATE TEST: Buffalo Treadmill Protocol - walk on treadmill increasing 1mph every 2 minutes until symptoms worsen.
▼
THE SYMPTOM-FREE HEART RATE TEST: Buffalo Treadmill Protocol - walk on treadmill increasing 1mph every 2 minutes until symptoms worsen.
The heart rate just before symptoms is your threshold. Exercise at 80-90% of this HR daily. This is now standard of care.
Leddy et al., JAMA Pediatr 2019 DOI ↗
2 A normal MRI does NOT mean a normal brain.
▼
A normal MRI does NOT mean a normal brain.
Concussions don't show on standard imaging because they're functional injuries - the wiring is disrupted, not the structure. If you've been dismissed because 'your MRI is fine,' that's expected.
CDC HEADS UP guidelines
3 THE VESTIBULAR SCREEN: Stand with feet together, arms crossed, eyes closed for 30 seconds.
▼
THE VESTIBULAR SCREEN: Stand with feet together, arms crossed, eyes closed for 30 seconds.
Significant swaying? Can't maintain position? This suggests vestibular involvement - 60% of persistent post-concussion has a vestibular component. Request vestibular physiotherapy.
Schneider et al., BMJ 2014 DOI ↗
4 Early aerobic exercise ACCELERATES recovery.
▼
Early aerobic exercise ACCELERATES recovery.
The old 'rest until symptoms resolve' is outdated. A 2019 RCT proved controlled exercise within days of concussion leads to faster recovery. Rest beyond 48-72 hours is now discouraged.
Leddy et al., JAMA Pediatr 2019
5 THE NECK CHECK: Did you have neck pain or whiplash with your concussion?
▼
THE NECK CHECK: Did you have neck pain or whiplash with your concussion?
Half of 'post-concussion' symptoms may actually be cervical. Press gently along your neck muscles. Tender? Request cervical spine physiotherapy assessment.
Cervicogenic headache research
6 Concussions can damage the pituitary gland - this occurs in 20-40% of moderate-severe TBI.
▼
Concussions can damage the pituitary gland - this occurs in 20-40% of moderate-severe TBI.
If you're exhausted, lost motivation, have low libido, or gained weight since concussion: request pituitary hormone panel (FSH, LH, testosterone, cortisol, IGF-1, TSH).
Tanriverdi et al., Nat Rev Endocrinol 2015
7 THE VISION CONVERGENCE TEST: Hold a pen at arm's length.
▼
THE VISION CONVERGENCE TEST: Hold a pen at arm's length.
Slowly bring it toward your nose while watching the tip. Can you follow it smoothly all the way? Do you see double? Does it trigger headache or fog? Convergence insufficiency is common post-concussion and treatable with vision therapy.
Vision therapy research
8 Cognitive exertion triggers symptoms just like physical exertion in PCS.
▼
Cognitive exertion triggers symptoms just like physical exertion in PCS.
Use the 25-5 rule: 25 minutes cognitive work, 5 minutes rest. Don't push through 'the wall' - it causes flares that set recovery back days.
Clinical pacing guidance
9 Write this down for your doctor: 'I need: neuropsychological testing (not MRI), vestibular screening (VOMS), cervical spine assessment, and pituitary hormone panel.
▼
Write this down for your doctor: 'I need: neuropsychological testing (not MRI), vestibular screening (VOMS), cervical spine assessment, and pituitary hormone panel.
My MRI is normal but my symptoms persist - there's usually something treatable.'
CDC HEADS UP guidelines
10 THE OMEGA-3 BOOST: Start high-dose DHA-predominant omega-3: 2,000-4,000mg DHA daily.
▼
THE OMEGA-3 BOOST: Start high-dose DHA-predominant omega-3: 2,000-4,000mg DHA daily.
DHA is the primary structural fat in neuronal membranes. Post-concussion, your brain is rebuilding - give it the raw materials.
Mills et al., Neurosurgery 2011
11 15-30% of concussion patients have symptoms lasting months.
▼
15-30% of concussion patients have symptoms lasting months.
You're not 'taking too long to recover' - this is normal variation. Most improve by 3-12 months. Track your trajectory monthly - improvement matters more than timeline.
Persistent post-concussion research
12 THE HYDRATION CHECK: Dehydration worsens post-concussion symptoms significantly.
▼
THE HYDRATION CHECK: Dehydration worsens post-concussion symptoms significantly.
Check your urine color - pale yellow is the target. Drink more water if dark. This simple intervention helps many people.
Ontario Neurotrauma Foundation guidelines
13 There's almost always something treatable.
▼
There's almost always something treatable.
Vestibular rehab, cervical spine treatment, vision therapy, hormone replacement, cognitive pacing - recovery is not just 'waiting.' Push for comprehensive evaluation.
Ontario Neurotrauma Foundation guidelines
View all 13 citations ▼
- Leddy et al., JAMA Pediatr 2019 doi:10.1001/jamapediatrics.2018.4397
- CDC HEADS UP guidelines
- Schneider et al., BMJ 2014 doi:10.1136/bjsports-2013-093267
- Leddy et al., JAMA Pediatr 2019
- Cervicogenic headache research
- Tanriverdi et al., Nat Rev Endocrinol 2015
- Vision therapy research
- Clinical pacing guidance
- CDC HEADS UP guidelines
- Mills et al., Neurosurgery 2011
- Persistent post-concussion research
- Ontario Neurotrauma Foundation guidelines
- Ontario Neurotrauma Foundation guidelines
Common Questions About Pcs Brain Fog
Based on clinical evidence and community insights. Use these as discussion prompts with your doctor, not self-diagnosis.
1. Can pcs cause brain fog? ▼
Pcs can contribute to brain fog. The most useful clues are the symptom pattern, nearby overlaps, and whether the mechanism described here matches your story: Post-concussion syndrome - persistent cognitive symptoms after head injury.
2. What does pcs brain fog usually feel like? ▼
Post-concussion syndrome - persistent cognitive symptoms after head injury.
3. What should I try first if I think pcs is involved? ▼
Start graded aerobic exercise using the Buffalo Concussion Treadmill Test protocol: walk on treadmill increasing 1mph every 2 minutes until symptoms increase. Your symptom-free threshold is your exercise prescription. Stay below it. Increase by 5-10% weekly. A 2019 Lancet Child & Adolescent Health RCT confirmed early aerobic exercise ACCELERATES recovery from concussion. Start with one high-yield change before adding complexity.
4. What tests should I discuss for pcs brain fog? ▼
The most useful next tests depend on the pattern, but common discussion points include post-concussion follow-up. Use the timing of your fog and the closest competing causes to narrow the first step.
5. When should I bring pcs brain fog to a clinician? ▼
STOP - Seek urgent medical evaluation if: sudden onset of cognitive symptoms (hours/days), new focal neurological symptoms (weakness, numbness, vision or speech changes), seizures, fever with confusion, or rapidly progressive decline. These may indicate a medical emergency requiring immediate care, not lifestyle modification.
6. How is pcs brain fog different from anxiety? ▼
Does your pattern fit Pcs more consistently than Anxiety when timing, triggers, and recovery are compared side-by-side?
7. How quickly can I tell whether this path is helping? ▼
Improvement timing depends on the root driver. Track the pattern for 1 to 2 weeks before deciding whether this path is helping, unless the story includes urgent escalation features.
8. When should I take this to a clinician instead of self-tracking? ▼
Escalate when fog stays stable or worse after a focused 1-2 week trial, function keeps dropping, or your story includes red-flag features. Bring your trigger/timing log, medication list, and prior test results to save appointment time.
9. Could this be Anxiety instead of Pcs? ▼
Yes, overlap is common in community stories. The key separator is: Does your pattern fit Pcs more consistently than Anxiety when timing, triggers, and recovery are compared side-by-side? Use a 7-day log of timing, triggers, and function impact before deciding between similar causes.
Source: Community confusion-pattern analysis
10. What do people usually try first when they suspect Pcs? ▼
A common first step from related community patterns is: Start graded aerobic exercise using the Buffalo Concussion Treadmill Test protocol: walk on treadmill increasing 1mph every 2 minutes until symptoms increase. Your symptom-free threshold is your exercise prescription. Stay below it. Increase by 5-10% weekly. A 2019 RCT showed this approach accelerates recovery compared to rest.
Source: Community pattern analysis (50 analyzed stories)
📖 Glossary of Terms (3 terms) ▼
Pcs
Pcs can contribute to brain fog.
vestibular
Relating to the inner ear balance system.
VOMS
vestibular screening.
Related Articles
Pcs and Brain Fog
Deep guide that expands the cause page with symptom-feel, differentiation, test triage, and doctor-prep language.
Anxiety and Brain Fog
Nearby confusion-pair article for side-by-side differentiation.
Sleep and Brain Fog
Nearby confusion-pair article for side-by-side differentiation.
When to Seek Urgent Help
STOP - Seek urgent medical evaluation if: sudden onset of cognitive symptoms (hours/days), new focal neurological symptoms (weakness, numbness, vision or speech changes), seizures, fever with confusion, or rapidly progressive decline. These may indicate a medical emergency requiring immediate care, not lifestyle modification.
Deep Dive
Clinical Fit + Advanced Detail
▼
Deep Dive
Clinical Fit + Advanced Detail
How This Cause Is Evaluated
The analyzer ranks all 66 causes, but this page shows the exact clues that strengthen or weaken Pcs so your next steps stay logical.
Direct Evidence Needed
- ✓ Story language directly matches a recurring Pcs pattern rather than broad fatigue alone.
- ✓ Symptoms recur with a repeatable trigger/timing pattern that is physiologically plausible for Pcs.
Supporting Clues
- + Context clues (history, exposures, or coexisting conditions) support Pcs as a priority hypothesis. (weight 7/10)
- + At least two independent signals point in the same direction without strong contradiction. (weight 6/10)
- + Response to relevant interventions tracks closer with Pcs than with Anxiety. (weight 5/10)
What Lowers Confidence
- − A competing cause (Anxiety) has stronger direct evidence in the story.
- − Core expected signals for Pcs are missing across history, timing, and triggers.
Timing Patterns That Strengthen This Fit
Worse in the morning
Pcs can present with morning-heavy fog when sleep or overnight physiology is relevant.
After-meal worsening
Post-meal worsening can strengthen Pcs when metabolic or inflammatory triggers are involved.
Worse after exertion
Post-exertional worsening can increase confidence for Pcs when recovery capacity is reduced.
Differentiate From Similar Causes
Question to ask
Does your pattern fit Pcs more consistently than Anxiety when timing, triggers, and recovery are compared side-by-side?
▼
Question to ask
Does your pattern fit Pcs more consistently than Anxiety when timing, triggers, and recovery are compared side-by-side?
If yes: Pattern consistency is stronger for Pcs.
If no: Pattern consistency is stronger for Anxiety.
Compare with Anxiety → Question to ask
Does your pattern fit Pcs more consistently than Migraine when timing, triggers, and recovery are compared side-by-side?
▼
Question to ask
Does your pattern fit Pcs more consistently than Migraine when timing, triggers, and recovery are compared side-by-side?
If yes: Pattern consistency is stronger for Pcs.
If no: Pattern consistency is stronger for Migraine.
Compare with Migraine → Question to ask
Does your pattern fit Pcs more consistently than Pain when timing, triggers, and recovery are compared side-by-side?
▼
Question to ask
Does your pattern fit Pcs more consistently than Pain when timing, triggers, and recovery are compared side-by-side?
If yes: Pattern consistency is stronger for Pcs.
If no: Pattern consistency is stronger for Pain.
Compare with Pain →How People Describe This Pattern
- • My most prominent issues are headaches and dizziness.
- • I also struggle significantly with light sensitivity.
- • These symptoms feel like a repeatable pattern that affects my cognition.
Often Confused With
Anxiety
OpenPcs and Anxiety can both present as fatigue + concentration problems when story detail is sparse.
Key question: When timing and trigger details are compared directly, which pattern fits better: Pcs or Anxiety?
Migraine
OpenPcs and Migraine can both present as fatigue + concentration problems when story detail is sparse.
Key question: When timing and trigger details are compared directly, which pattern fits better: Pcs or Migraine?
Pain
OpenPcs and Pain can both present as fatigue + concentration problems when story detail is sparse.
Key question: When timing and trigger details are compared directly, which pattern fits better: Pcs or Pain?
Use This Page With the Story Analyzer
Use this starter to run a focused check while still comparing all 66 causes:
"I want to check whether Pcs could explain my brain fog. My most relevant symptoms are headaches, dizziness, and it gets worse with screens, bright lights."
Map My Pattern for PcsBiomarkers and Tests
Post-Concussion Investigation
- Neuropsychological testing (objective cognitive assessment - NOT MRI, which is usually normal)
- VOMS (vestibular screening)
- Pituitary panel (FSH, LH, testosterone, cortisol, IGF-1, TSH, prolactin - pituitary damage in 20-40% of TBI)
- Cervical spine assessment
- Orthostatic vitals (post-concussion POTS)
Doctor Conversation Script
Bring concise evidence, request specific tests, and agree on rule-out criteria.
Initial Visit
"I want to systematically evaluate whether Pcs is contributing to my brain fog and compare it against close alternatives."
Key points to emphasize
- • Please document what findings would confirm this cause versus lower confidence.
- • I want an evidence-first workup with clear follow-up criteria.
- • Please note which competing causes should be checked in parallel if results are inconclusive.
- • Please separate metabolic, sleep, autonomic, and medication overlap before narrowing to one cause.
Tests to discuss
Post-Concussion Investigation
Used to rule in or rule out Pcs.
Medical Treatment Options
Discuss these options with your prescribing physician. This information is educational, not medical advice.
Hormone Replacement (if pituitary damaged)
If testing reveals deficiencies: targeted hormone replacement. Growth hormone deficiency post-TBI is particularly associated with cognitive impairment and fatigue.
Evidence: Moderate - Tanriverdi et al., Nat Rev Endocrinol, 2015
Supplements — What the Evidence Says
Supplements are adjuncts, not replacements for lifestyle changes. Discuss with your healthcare provider.
Omega-3 (DHA-predominant)
Dose: 2,000-4,000mg DHA daily
DHA is the primary structural fat in neuronal membranes. High-dose DHA supports membrane repair post-injury. But exercise and vestibular rehab are the primary treatments - omega-3 is adjunct.
Mills et al., Neurosurgery, 2011
Creatine
Dose: 5g daily
Emerging evidence: creatine supports brain energy metabolism post-TBI. Sakellaris et al. 2006 RCT in children showed improvement. Low-cost, well-tolerated adjunct.
Sakellaris et al., J Trauma, 2006
Psychological Support and Therapy
Neuropsychology for cognitive assessment + rehab. Vestibular rehab if dizziness. CBT for post-concussion anxiety. Vision therapy if convergence insufficiency.
Quick Reference
Quick Win
Start graded aerobic exercise using the Buffalo Concussion Treadmill Test protocol: walk on treadmill increasing 1mph every 2 minutes until symptoms increase. Your symptom-free threshold is your exercise prescription. Stay below it. Increase by 5-10% weekly. A 2019 Lancet Child & Adolescent Health RCT confirmed early aerobic exercise ACCELERATES recovery from concussion.
Leddy et al., Lancet Child Adolesc Health, 2019 - Buffalo Treadmill Protocol RCT
Not sure this is your cause?
Brain fog can have many causes. The story analyzer can help narrow down what pattern fits best for you.
About This Page
Written by
Dr. Alexandru-Theodor Amarfei, M.D.Medical reviewer and clinical content lead for the What Is Brain Fog cause library
Research methodology
Evidence-based approach using peer-reviewed sources
View our evidence grading standardsLast updated: . We review our content regularly and update when new research emerges.
Important: This content is for educational purposes only and does not replace professional medical advice. Consult a qualified healthcare provider for diagnosis and treatment.
Claim-Level Evidence
- [C] Pattern-focused visual summary for PCS intended to support structured, non-diagnostic investigation planning. low/validated
- [B] pcs: Schneider et al., BMJ, 2014 - Vestibular rehabilitation. medium/validated