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6.4 Concussion Evaluation, Vestibular-Ocular Dysfunction, and Return-to-Play/Work Protocols
ABPMR Physical Medicine and Rehabilitation Board Exam Study Guide Exam
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1 Chapter 1: Introduction & Exam Overview
1.1 ABPMR Part I Exam Overview & Format 1.2 Board Review Strategy & Content Blueprint Breakdown
2 Chapter 2: Musculoskeletal Medicine
2.1 Shoulder & Upper Extremity Diagnostics 2.2 Knee, Hip & Lower Extremity Conditions 2.3 Spine Pathology, Radiculopathy & Myelopathy 2.4 Inflammatory Arthritis, Tendinopathies & Concussion 2.5 Bone Health, Osteoporosis & Metabolic Bone Disease 2.6 Thoracic Outlet Syndrome & Peripheral Nerve Entrapment 2.7 Fracture Rehabilitation & Immobilization Complications 2.8 Overuse Tendinopathies & Regenerative Medicine 2.9 Gait Analysis & Abnormal Gait Patterns
3 Chapter 3: Spinal Cord Injury Rehabilitation
3.1 ASIA Examination & Impairment Scale 3.2 Spinal Cord Injury Syndromes 3.3 Autonomic Dysreflexia & Acute Complications 3.4 Neurogenic Bladder, Bowel & Secondary Complications
4 Chapter 4: Stroke & Neuromuscular Rehabilitation
4.1 Stroke Vascular Syndromes & Acute Assessment 4.2 Stroke Motor Recovery & Hemiplegic Complications 4.3 Spasticity Assessment & Multimodal Management 4.4 ALS, GBS, CIDP & Neuromuscular Disease Rehab 4.5 Multiple Sclerosis & Demyelinating Disease Rehabilitation 4.6 Parkinsonism, Movement Disorders & Functional Neurologic Disorder
5 Chapter 5: Electrodiagnostics (EMG/NCS)
5.1 Nerve Conduction Studies Principles & Physics 5.2 Needle Electromyography & MUAP Analysis 5.3 Mononeuropathies & Radiculopathy Patterns 5.4 Neuromuscular Junction Disorders & Myopathies
6 Chapter 6: Traumatic Brain Injury
6.1 TBI Severity Classification, Glasgow Coma Scale, and Pathophysiology 6.2 Rancho Los Amigos Levels of Cognitive Functioning and Disability Rating Scale 6.3 Neurobehavioral Sequelae and Agitation Management 6.4 Concussion Evaluation, Vestibular-Ocular Dysfunction, and Return-to-Play/Work Protocols
7 Chapter 7: Chronic Pain & Interventional Spine
7.1 Fluoroscopic Spine Interventions 7.2 Opioid Stewardship & Controlled Substance Compliance 7.3 Complex Regional Pain Syndrome, Fibromyalgia & Myofascial Pain 7.4 Spinal Cord Stimulation & Intrathecal Therapy
8 Chapter 8: Amputee Rehabilitation & Prosthetics
8.1 Amputation Surgical Levels & Medicare K-Levels 8.2 Socket Designs & Suspension Systems 8.3 Prosthetic Feet & Microprocessor Knee Mechanisms 8.4 Post-Amputation Care, Residual Limb & Phantom Pain
9 Chapter 9: Pediatric Rehabilitation
9.1 Cerebral Palsy Classification & GMFCS 9.2 Spina Bifida & Myelomeningocele Management 9.3 Muscular Dystrophies & Neuromuscular Disease in Children 9.4 Pediatric Brachial Plexopathy & Congenital Disorders
10 Chapter 10: Prosthetics, Orthotics & Assistive Technology
10.1 Lower Limb Orthoses — AFOs & KAFOs 10.2 Spinal & Upper Extremity Orthoses 10.3 Upper Limb Prosthetics — Body-Powered vs Myoelectric 10.4 Wheelchairs, Seating Systems & Pressure Mapping
11 Chapter 11: Medical Rehabilitation & Outcomes
11.1 Dysphagia Assessment & Management 11.2 Neurogenic Bladder & Bowel Management 11.3 Pressure Injuries & Wound Management 11.4 Outcome Measures & Medical Complications 11.5 Cancer Rehabilitation & Oncologic Rehabilitation 11.6 Burns, Endocrine/Metabolic & Medical Complications Rehabilitation
12 Chapter 12: Cardiopulmonary Rehabilitation
12.1 Cardiac Rehabilitation Phases & Metabolic Equivalents 12.2 Pulmonary Rehabilitation & COPD Management
13 Chapter 13: Foundational Rehabilitation Concepts
13.1 Kinesiology, Biomechanics & Functional Anatomy 13.2 Rehabilitation Pharmacology & Medication Management 13.3 Research Methodology, Biostatistics & Evidence-Based Practice 13.4 Nutrition, Metabolism & Energy Expenditure in Rehabilitation 13.5 Diagnostic Procedures: Imaging, MSK Ultrasound, Urodynamics & Neuropsych Assessment
6.4 Concussion Evaluation, Vestibular-Ocular Dysfunction, and Return-to-Play/Work Protocols
Key Takeaways Explain This Topic AI
Sports-Related Concussion (SRC) is a mild traumatic brain injury caused by biomechanical forces triggering a complex neurometabolic cascade (glutamate toxicity, intracellular calcium influx, potassium efflux, and relative cerebral energy crisis).
The Sport Concussion Assessment Tool (SCAT5/SCAT6) is the standardized clinical framework evaluating symptoms, cognitive function (SAC), balance (mBESS), and neurological signs.
Vestibular/Ocular Motor Screening (VOMS) assesses 5 domains (Smooth Pursuit, Saccades, Near Point of Convergence, VOR, VOR Cancellation); a Near Point of Convergence (NPC) break point >= 5 cm is abnormal and predictive of protracted recovery.
The 6-step Graded Return-to-Play (RTP) protocol mandates a minimum of 24 hours symptom-free per stage; if symptoms recur at any step, the athlete drops back to the previous symptom-free step after 24 hours rest.
Return-to-Learn (RTL) academic accommodations and full cognitive recovery MUST precede full contact return-to-play (Stage 5/6).
Last updated: July 2026
6.4 Concussion Evaluation, Vestibular-Ocular Dysfunction, and Return-to-Play/Work Protocols
Mild Traumatic Brain Injury (mTBI), commonly referred to as Concussion or Sports-Related Concussion (SRC) , represents a functional rather than structural brain injury. Management of concussion has evolved from passive prolonged rest toward active targeted rehabilitation, systematic vestibular-ocular screening, and structured, objective return-to-learn and return-to-play protocols.
Neurometabolic Cascade of Concussion
Concussion results from direct impact to the head, neck, or body that transmits impulsive forces to the brain. This mechanical shearing initiates a classic neurometabolic cascade :
Membrane Depolarization and Glutamate Release : Biomechanical stretching of neuronal membranes causes abrupt potassium ( K + K^+ K + ) efflux and massive presynaptic release of excitatory glutamate.
Excitotoxic Intracellular Calcium Influx : Glutamate activates NMDA receptors, driving calcium ( C a 2 + Ca^{2+} C a 2 + ) into cells and triggering neuronal dysfunction.
Hyperglycolytic Energy Crisis : Membrane ion pumps ( N a + / K + Na^+/K^+ N a + / K + ATPase) work at maximal capacity to restore resting membrane potentials, consuming massive amounts of cellular adenosine triphosphate (ATP).
Cerebral Hypoperfusion : Simultaneous microvascular constriction reduces cerebral blood flow (CBF). The combination of high metabolic demand and reduced blood supply creates a profound cellular energy crisis .
Vulnerability Period : During this window of metabolic vulnerability (typically lasting 7 to 10 days, but longer in adolescents), the brain is exquisitely susceptible to secondary injury or catastrophic Second-Impact Syndrome.
Concussion Evaluation and the SCAT Framework
The Sport Concussion Assessment Tool (SCAT5 / SCAT6) is the internationally accepted standardized framework for evaluating athletes aged 12 years and older (Child SCAT exists for ages 5-11). +-------------------------------------------------------------------------+
- | COMPONENTS OF THE SCAT EVALUATION |
- +------------------------------+------------------------------------------+
- | SCAT Section Domain | Clinical Assessment Content |
- +------------------------------+------------------------------------------+
- | 1. Immediate / On-Field | - Red Flags (neck pain, seizure, weakness)|
- | Assessment | - Observable signs (loss of consciousness)|
- | | - Maddocks Questions (venue, score, half)|
- | | - Glasgow Coma Scale & Cervical Spine |
- +------------------------------+------------------------------------------+
- | 2. Symptom Evaluation | 22-item self-report symptom scale |
- | | (Severity rated 0 to 6; Max score = 132) |
- +------------------------------+------------------------------------------+
- | 3. Cognitive Assessment | Standardized Assessment of Concussion |
- | (SAC) | (SAC): Orientation, Immediate Memory, |
- | | Digits Backward, Month Reverse, Delayed |
- | | Recall |
- +------------------------------+------------------------------------------+
- | 4. Neurological & Balance | Balance Error Scoring System (mBESS): |
- | Screening | Double leg, single leg, tandem stance |
- | | tested on firm surface (errors counted) |
- +------------------------------+------------------------------------------+
- Vestibular-Ocular Motor Screening (VOMS)
Vestibular and ocular motor dysfunction occurs in up to 60% of concussed patients and is an independent predictor of prolonged recovery (> 30 days). The VOMS tool systematically assesses symptom provocation (headache, dizziness, nausea, fogginess rated 0-10) across 5 distinct domains : +---------------------------------------------------------------------------------------------------+
- | VESTIBULAR / OCULAR MOTOR SCREENING (VOMS) DOMAINS |
- +-------------------+-----------------------------------+-------------------------------------------+
- | VOMS Domain | Operational Testing Procedure | Abnormal Finding / Significance |
- +-------------------+-----------------------------------+-------------------------------------------+
- | **Smooth Pursuit**| Track target moving smoothly | Symptom elevation > 0 points; |
- | | horizontally and vertically | jerky saccadic intrusions |
- +-------------------+-----------------------------------+-------------------------------------------+
- | **Saccades** | Rapidly alternate gaze between | Symptom elevation > 0 points; |
- | | two targets (horizontal/vertical) | dysmetria or overshoot |
- +-------------------+-----------------------------------+-------------------------------------------+
- | **Convergence** | Slowly bring target toward nose | **Near Point of Convergence (NPC)** |
- | | until double vision occurs | **break point >= 5 cm** from nose bridge |
- +-------------------+-----------------------------------+-------------------------------------------+
- | **Vestibulo-Ocular| Rotate head horizontally/vertically| Inability to maintain focus on target; |
- | Reflex (VOR)** | at 180 bpm while focusing target | significant symptom spike |
- +-------------------+-----------------------------------+-------------------------------------------+
- | **Visual Motion | Rotate head and torso together in | Tests VOR Cancellation; prominent |
- | Sensitivity (VMS)**| phase while focusing on thumb | dizziness/nausea indicates central deficit|
- +-------------------+-----------------------------------+-------------------------------------------+
Clinical Highlight : Near Point of Convergence (NPC) measurement is highly specific. An NPC distance >= 5 cm (or 50 mm) indicates visual convergence insufficiency, requiring specialized vestibular physical therapy and vision therapy (e.g., pencil push-ups, Brock string exercises).
Graded Return-to-Play (RTP) Protocol
Following a brief initial period of relative rest (24 to 48 hours post-injury), concussed individuals begin a structured, stepwise return-to-play progression.
The 6-Step RTP Progression
Stage Recovery Step Functional Exercise Strategy Operational Goal / Allowed Activities
1 Symptom-Limited Activity Daily activities that do not provoke symptoms. Walking, basic household tasks; no dedicated exercise.
2 Light Aerobic Exercise Stationary cycling or treadmill walking at < 70% max heart rate . Increase heart rate; NO resistance training or weightlifting.
3 Sport-Specific Exercise Running or skating drills; non-contact sport movements. Add movement; no head impact activities or sport drills with others.
4 Non-Contact Training Drills Harder training drills (e.g., passing, complex tactical drills); progressive resistance training. Exercise, coordination, and cognitive load; may start resistance training.
5 Full Contact Practice Following medical clearance , participate in normal, full-contact practice. Restore confidence and assess functional skills by coaching staff.
6 Return to Sport Unrestricted gameplay and competition. Full competitive participation.
Mandatory Progression Rules
The 24-Hour Rule : Each individual step MUST take a minimum of 24 hours . Therefore, complete progression through the 6-step protocol requires a minimum of 6 days .
Symptom Recurrence Protocol : If concussion symptoms recur at ANY stage of progression:
The athlete MUST immediately stop activity.
Rest for a minimum of 24 hours until completely symptom-free.
Resume progression at the previous symptom-free step (e.g., if symptoms occur during Step 4, rest 24h, then restart at Step 3).
Return-to-Learn (RTL) Protocol
A critical directive in concussion management is that Return-to-Learn MUST precede full Return-to-Play . Cognitive stress can provoke symptoms just as physical exertion does. +-------------------------------------------------------------------------+
- | STEPWISE RETURN-TO-LEARN (RTL) PROGRESSION |
- +------------------------------+------------------------------------------+
- | RTL Stage Step | Academic Accommodations & Strategy |
- +------------------------------+------------------------------------------+
- | Step 1: Daily Activities | Initial cognitive rest at home; reading, |
- | at Home | screens restricted to < 15 min if tolerated|
- +------------------------------+------------------------------------------+
- | Step 2: School Activities | Homework and cognitive tasks at home |
- | at Home | for 30-45 minute increments with rest |
- +------------------------------+------------------------------------------+
- | Step 3: Part-Time School | Re-enter school half-days; frequent breaks|
- | Re-Entry | in nurse office; no exams or heavy tests |
- +------------------------------+------------------------------------------+
- | Step 4: Full-Time School | Full school days with accommodations |
- | with Accommodations | (extra time for tests, reduced workload) |
- +------------------------------+------------------------------------------+
- | Step 5: Full-Time School | Full academic load without accommodations|
- | without Accommodations| (**Prerequisite for Step 5/6 Return to Play**)|
- +------------------------------+------------------------------------------+
Key Rule: An athlete cannot be cleared for full contact practice (RTP Step 5) or full competition (RTP Step 6) until they have successfully returned to a full-time academic schedule without requiring cognitive accommodations.