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Rounds, minus the stress

Explain It! Directory

Active Recall Oral Practice & AI-Grading

Getting put on the spot on rounds is how concepts actually stick — but the adrenaline doesn’t help you learn. Explain It gives you that same rep in private: pick a concept, explain it out loud in your own words, and an AI compares your answer to the chapter’s hidden model answer — then gives you a score and the specific points to firm up. No audience, no judgment, and you can redo it as many times as you like.

Part I

Musculoskeletal

31 chapters
  1. 1.Shoulder Anatomy, Instability, and ImpingementFreePractice
  2. 2.Rotator Cuff, Adhesive Capsulitis, and BicepsPractice
  3. 3.Shoulder Fractures, Winging, and Nerve EntrapmentPractice
  4. 4.Elbow Anatomy, Epicondylitis, and Throwing InjuriesPractice
  5. 5.Elbow Nerve Entrapments and Adult FracturesPractice
  6. 6.Wrist, Carpal Bones, Carpal Tunnel, and DeQuervainPractice
  7. 7.Hand: Flexor Pulleys, Trigger Finger, Dupuytren, and the Fingertip Deformity QuartetPractice
  8. 8.Hand: Thumb UCL Injury, Intrinsic Muscles, and Deformity by Nerve InjuryPractice
  9. 9.Hip Anatomy, Muscles, and Special TestsPractice
  10. 10.Hip Fractures, Arthroplasty, and Pediatric HipPractice
  11. 11.Knee Anatomy, ACL, PCL, and LigamentsPractice
  12. 12.Knee Meniscus, Patellofemoral, and OverusePractice
  13. 13.Ankle Anatomy, Lateral Sprains, Achilles Pathology, and Compartment SyndromePractice
  14. 14.Foot: Stress Fractures, Plantar Fasciitis, Morton, Lisfranc, and DeformitiesPractice
  15. 15.Spine: Anatomy, Disc Herniation, and RadiculopathyPractice
  16. 16.Spine: Stenosis, Spondylolisthesis, and Facet-Mediated PainPractice
  17. 17.Spine: Red Flags, Cauda Equina, Scoliosis, and Ankylosing SpondylitisPractice
  18. 18.Sports Medicine: Concussion, Return-to-Play Protocol, and StingersPractice
  19. 19.Sports Medicine: Exercise Physiology, Cardiac Equations, and Muscle PhysiologyPractice
  20. 20.Sports Medicine: Environmental Illness, Rhabdomyolysis, and Special PopulationsPractice
  21. 21.Rheumatoid Arthritis, Osteoarthritis, and Crystal ArthropathiesPractice
  22. 22.SLE, Inflammatory Myopathies, and SclerodermaPractice
  23. 23.Spondyloarthropathies and FibromyalgiaPractice
  24. 24.Osteoporosis Part 1: Diagnosis, DEXA, Risk FactorsPractice
  25. 25.Osteoporosis Part 2: Treatment and Fracture ManagementPractice
  26. 26.MSK Ultrasound and Joint InjectionPractice
  27. 27.Nerve Injury Classification and EDX CorrelationPractice
  28. 28.Salter-Harris Fractures and Pediatric MSKPractice
  29. 29.Complex Regional Pain Syndrome and Myofascial PainPractice
  30. 30.Groin Injuries, Athletic Pubalgia, and Leg Length DiscrepancyPractice
  31. 31.Sports Cardiac Issues, Special Populations, and Exercise-Induced BronchospasmPractice

Part II

Prosthetics & Orthotics

18 chapters
  1. 1.Gait Analysis and BiomechanicsPractice
  2. 2.Amputation Levels and EpidemiologyPractice
  3. 3.Surgical Principles and Post-Amputation RehabilitationPractice
  4. 4.Transtibial ProstheticsPractice
  5. 5.Transfemoral ProstheticsPractice
  6. 6.Upper Limb ProstheticsPractice
  7. 7.Lower Extremity OrthosesPractice
  8. 8.Spinal OrthosesPractice
  9. 9.Upper Limb OrthosesPractice
  10. 10.Advanced Prosthetic TechnologyPractice
  11. 11.Materials and FabricationPractice
  12. 12.Pediatric Prosthetics and OrthoticsPractice
  13. 13.Special Populations in Prosthetics and OrthoticsPractice
  14. 14.Outcomes and Energy ExpenditurePractice
  15. 15.Wheelchair and Power MobilityPractice
  16. 16.Ambulation Aids: Canes, Crutches, Walkers, and Weight-Bearing StatusPractice
  17. 17.Adaptive Driving, Environmental Control Units, and Medicare DME CriteriaPractice
  18. 18.Complications of Prosthetics, Orthotics, and MobilityPractice

Part III

Cerebrovascular / Stroke

14 chapters
  1. 1.Vascular Anatomy and Stroke SyndromesPractice
  2. 2.Acute Ischemic Stroke: Thrombolysis and ThrombectomyPractice
  3. 3.Acute Ischemic Stroke: Imaging, Blood Pressure Management, and AntithromboticsPractice
  4. 4.Intracerebral HemorrhagePractice
  5. 5.Subarachnoid Hemorrhage and Vascular MalformationsPractice
  6. 6.Stroke Motor Recovery, Brunnstrom Stages, and Constraint-Induced Movement TherapyPractice
  7. 7.Stroke Rehabilitation Interventions and Functional AssessmentPractice
  8. 8.Post-Stroke DysphagiaPractice
  9. 9.Post-Stroke Aphasia, Language Disorders, and DysarthriaPractice
  10. 10.Post-Stroke Cognitive DeficitsPractice
  11. 11.Post-Stroke Shoulder and Pain SyndromesPractice
  12. 12.Post-Stroke Medical ComplicationsPractice
  13. 13.Post-Stroke Sexuality, Driving, and Community ReintegrationPractice
  14. 14.Hypoxic-Ischemic Encephalopathy and Anoxic Brain InjuryPractice

Part IV

Spinal Cord Injury

14 chapters
  1. 1.Spinal Cord Anatomy and NeuroanatomyPractice
  2. 2.Epidemiology, Etiology, and PreventionPractice
  3. 3.ISNCSCI Classification and SCI SyndromesPractice
  4. 4.Pathophysiology and Acute ManagementPractice
  5. 5.Autonomic DysreflexiaPractice
  6. 6.Neurogenic Bladder ManagementPractice
  7. 7.Neurogenic Bowel and GI ComplicationsPractice
  8. 8.Respiratory ManagementPractice
  9. 9.Cardiovascular ComplicationsPractice
  10. 10.Spasticity ManagementPractice
  11. 11.Pain Syndromes After Spinal Cord InjuryPractice
  12. 12.Pressure InjuriesPractice
  13. 13.Sexuality, Fertility, and Reproductive HealthPractice
  14. 14.MSK Complications, Functional Outcomes, and the Rehabilitation ContinuumPractice

Part V

Traumatic Brain Injury

14 chapters
  1. 1.Epidemiology, Definitions, and PreventionPractice
  2. 2.Classification and Severity ScalesPractice
  3. 3.Pathophysiology of Traumatic Brain InjuryPractice
  4. 4.Neuroimaging in Traumatic Brain InjuryPractice
  5. 5.Acute Management of Severe TBIPractice
  6. 6.Disorders of ConsciousnessPractice
  7. 7.Medical and Neurological Complications After TBIPractice
  8. 8.Pharmacology After TBIPractice
  9. 9.Agitation and Behavioral ManagementPractice
  10. 10.Spasticity and Motor RecoveryPractice
  11. 11.Neuroendocrine Disorders After TBIPractice
  12. 12.Concussion, Mild TBI, and CTEPractice
  13. 13.Pediatric and Geriatric Traumatic Brain InjuryPractice
  14. 14.The Rehabilitation ContinuumPractice

Part VI

Pediatric Rehabilitation

19 chapters
  1. 1.Normal Development: Milestones, Grasp Progression, and Primitive ReflexesPractice
  2. 2.Developmental Screening, Red Flags, Autism, and IDEA Part C and Part BPractice
  3. 3.Cerebral Palsy: Definition, Etiology, Early Detection, and GMFCSPractice
  4. 4.Cerebral Palsy: Subtypes, the Tone-Management Ladder, Gait, and Hip SurveillancePractice
  5. 5.Spina Bifida and Neural Tube DefectsPractice
  6. 6.Duchenne and Becker Muscular Dystrophy and Spinal Muscular AtrophyPractice
  7. 7.Hereditary Neuropathies, Myotonic Dystrophy, and the Congenital MyopathiesPractice
  8. 8.Brachial Plexus Birth InjuriesPractice
  9. 9.Pediatric Traumatic Brain InjuryPractice
  10. 10.Pediatric Spinal Cord Injury and SCIWORAPractice
  11. 11.Genetic and Chromosomal SyndromesPractice
  12. 12.Pediatric MSK DisordersPractice
  13. 13.Juvenile Idiopathic Arthritis: ILAR Subtypes, Uveitis Screening, and MASPractice
  14. 14.Juvenile Myositis, Heritable Connective Tissue Disorders, and Infectious ArthritidesPractice
  15. 15.Pediatric Burns: TBSA, Depth, Parkland, and Anti-Deformity PositioningPractice
  16. 16.Pediatric Cancer Rehabilitation, Late Effects, and Sickle Cell DiseasePractice
  17. 17.Pediatric Pharmacology and Spasticity ManagementPractice
  18. 18.Orthotics, Assistive Technology, and OutcomesPractice
  19. 19.Early Intervention, School Services, and TransitionPractice

Part VII

Rehabilitation Topics

17 chapters
  1. 1.Pain Rehabilitation Part 1: Taxonomy, Neuroanatomy, and Non-Opioid PharmacologyPractice
  2. 2.Pain Rehab: Headaches, CRPS, and the Post-Amputation Pain TriadPractice
  3. 3.Pain Rehab: Myofascial Pain, Fibromyalgia, Cancer Pain, and Sympathetic BlocksPractice
  4. 4.Pain Rehabilitation Part 3: Interventional Procedures and NeuromodulationPractice
  5. 5.Spasticity Management: Definitions, Pharmacology, and InterventionsPractice
  6. 6.Neurogenic Bladder and BowelPractice
  7. 7.Dysphagia and NutritionPractice
  8. 8.Pressure InjuriesPractice
  9. 9.Functional Assessment: the ICF Framework, Ordinal Data, FIM, and BarthelPractice
  10. 10.Balance, Exertion, and Stroke-Recovery Scales, plus the IRF RulesPractice
  11. 11.Deconditioning, Immobility, and DVTPractice
  12. 12.Wheelchair Seating Part 1: Assessment, Measurements, Cushions, and Tilt vs ReclinePractice
  13. 13.Wheelchair Seating Part 2: Frames, Wheels, Propulsion, and Prescription by DiagnosisPractice
  14. 14.Movement DisordersPractice
  15. 15.Sleep DisordersPractice
  16. 16.Chronic Pelvic Pain and SexualityPractice
  17. 17.Psychological Adjustment to Disability, Caregiver Burden, Community Reintegration, and Vocational RehabilitationPractice

Part VIII

Medical Rehabilitation

14 chapters
  1. 1.Cardiac Rehabilitation: Phases, Risk Stratification, Exercise Prescription, and Special PopulationsPractice
  2. 2.Pulmonary Rehabilitation: PFTs, COPD Classification, Oxygen Therapy, Ventilator Weaning, and TracheostomyPractice
  3. 3.Cancer Rehabilitation: Fatigue, Lab-Value Precautions, Plexopathy, Lymphedema, Mirels Scoring, and Paraneoplastic SyndromesPractice
  4. 4.Burns Rehabilitation: Depth Classification, TBSA, Parkland Formula, Anti-Deformity Positioning, and Scar ManagementPractice
  5. 5.Organ Transplantation Rehabilitation: Denervated Heart, Immunosuppression, and Solid-Organ SpecificsPractice
  6. 6.Physical Modalities: Heat, Cold, Ultrasound, Diathermy, Electrical Stimulation, Iontophoresis, Traction, and BiofeedbackPractice
  7. 7.Geriatric Rehabilitation: Aging Physiology, Falls, Polypharmacy, Hip Fracture, Frailty, Delirium, and DementiaPractice
  8. 8.Sleep Disorders in Rehabilitation: Architecture, OSA, Central Apnea, Insomnia, Circadian Rhythm Disorders, REM Behavior Disorder, and Restless Legs SyndromePractice
  9. 9.Delirium in Medical Rehabilitation: Diagnosis, Subtypes, Prevention, and ManagementPractice
  10. 10.Lymphedema and Edema Management: Lymphatic Anatomy, ISL Staging, Complete Decongestive Therapy, and the Lymphedema-Versus-Venous-Versus-Lipedema TriadPractice
  11. 11.Post-COVID and PASC Rehabilitation: Fatigue, Post-Exertional Malaise, Dysautonomia and POTS, Cognitive Dysfunction, and the Pacing-Versus-Graded-Exercise Branch PointPractice
  12. 12.Polytrauma and Critical Illness: ICU-Acquired Weakness, CIP vs CIM, Early Mobilization, and Blast InjuryPractice
  13. 13.Palliative Care: Hospice Distinction, WHO Analgesic Ladder, Symptom Management, Goals of Care, and PrognosticationPractice
  14. 14.Endocrine and Metabolic Disorders in Rehabilitation: Diabetes, Diabetic Foot, Thyroid Myopathies, Pituitary, and Adrenal DisordersPractice

Part IX

Electrodiagnostics

13 chapters
  1. 1.Neurophysiology FundamentalsPractice
  2. 2.Instrumentation and Technical FactorsPractice
  3. 3.Nerve Conduction StudiesPractice
  4. 4.Late Responses, Repetitive Nerve Stimulation, Single-Fiber EMG, and Autonomic TestingPractice
  5. 5.Needle ElectromyographyPractice
  6. 6.RadiculopathyPractice
  7. 7.PlexopathyPractice
  8. 8.Entrapment Neuropathies: Upper ExtremityPractice
  9. 9.Entrapment Neuropathies: Lower ExtremityPractice
  10. 10.Polyneuropathy: Classification, Patterns, and Key DiagnosesPractice
  11. 11.Motor Neuron Disease: ALS, SMA, Kennedy Disease, and Post-Polio SyndromePractice
  12. 12.MyopathyPractice
  13. 13.Neuromuscular Junction DisordersPractice

Part X

Foundational Sciences

12 chapters
  1. 1.Brain Neuroanatomy: Cortical Maps, Basal Ganglia, Thalamus, and Brainstem NucleiPractice
  2. 2.Kinesiology and Biomechanics: Levers, Muscle Physiology, Contraction Types, and ArthrokinematicsPractice
  3. 3.Normal Gait Analysis: The Gait Cycle, Rancho Los Amigos Phases, Muscle Choreography, and Three RockersPractice
  4. 4.Exercise Physiology: Energy Systems, VO2max, Fick, METs, Karvonen, FITT, and Training AdaptationsPractice
  5. 5.Biostatistics and Research Design: Measurement Scales, 2x2 Tables, Study Hierarchy, and BiasPractice
  6. 6.Pharmacology Cross-Cutting: Opioid Equianalgesic Math, Neuropathic Pain Agents, and NSAIDsPractice
  7. 7.Peripheral Nerve Recovery: Seddon/Sunderland, Wallerian Degeneration, and RegenerationPractice
  8. 8.CNS Recovery and Neuroplasticity: Hebbian Learning, Cortical Reorganization, and Constraint-Induced Movement TherapyPractice
  9. 9.Musculoskeletal and Cardiopulmonary Aging: Sarcopenia, Osteoporosis Treatment, Isolated Systolic Hypertension, and the Age-Adjusted Blood GasPractice
  10. 10.The Creatinine That Lies: Renal and Pharmacokinetic Aging, Cognitive and Sensory Decline, and the Geriatric SyndromesPractice
  11. 11.Neuromuscular Junction Physiology: ACh Synthesis, Quantal Release, and the Safety FactorPractice
  12. 12.Spinal Cord, Cranial Nerve, and Peripheral Neuroanatomy: Reflex Arcs, ISNCSCI Key Muscles, Dermatomes, Cranial Nerves, Plexus Anatomy, and the Autonomic Nervous SystemPractice

Part XI

Neurologic Conditions

6 chapters
  1. 1.Multiple SclerosisPractice
  2. 2.ALS and Motor Neuron DiseasePractice
  3. 3.Parkinson Disease and Movement DisordersPractice
  4. 4.GBS, CIDP, Post-Polio Syndrome, and Neuromuscular Junction DisordersPractice
  5. 5.Functional Neurologic DisorderPractice
  6. 6.Hereditary Spastic ParaplegiaPractice

Part XII

Administration & Practice

4 chapters
  1. 1.CPT Coding, Billing, and Documentation: E/M Codes, Modifiers, the 8-Minute Rule, and IRF RequirementsPractice
  2. 2.Disability, Impairment, and Medicolegal Topics: ICF, AMA Guides 6th Edition, SSA, Workers' Comp, Capacity, and DaubertPractice
  3. 3.Practice Management and Quality: HIPAA, Bioethics, PDSA, Patient Safety, Malpractice, and MIPSPractice
  4. 4.Rehabilitation Team, Settings, and Care Coordination: Team Models, Levels of Care, Life Care Planning, Handoffs, and Compliance LawsPractice