← All Conditions ← Immune Overview

Rheumatoid Arthritis

★ CMTO Exam Focus

Rheumatoid arthritis (RA) is a chronic, systemic autoimmune disease in which autoreactive T-cells and B-cells attack the synovial membrane of diarthrodial joints, triggering an inflammatory cascade that produces pannus — a destructive vascular granulation tissue that erodes articular cartilage, subchondral bone, and supporting ligaments. The hallmark clinical finding is symmetrical bilateral joint involvement beginning in the small joints of the hands and feet (MCP, PIP, MTP), with morning stiffness lasting more than 30 minutes that distinguishes it from osteoarthritis. RA affects approximately 1% of the global population, with women affected 2–3 times more often than men and peak onset between ages 25 and 50. Unlike the mechanical wear-and-tear of OA, RA is a systemic inflammatory disease with extra-articular manifestations that can affect the heart, lungs, eyes, and blood vessels.

Populations and Risk Factors

  • Women affected approximately 2–3:1 over men; onset most common between ages 25 and 50, though can occur at any age including juvenile forms (JIA)
  • Strong genetic predisposition: HLA-DRB1 shared epitope alleles present in 60–70% of seropositive RA patients; first-degree relatives have 3–5 times the population risk
  • Smoking is the strongest modifiable risk factor — increases risk 1.5–2 times and accelerates disease progression
  • Possible immunologic trigger: Epstein-Barr virus, Porphyromonas gingivalis (periodontal disease), and other microbial agents hypothesized to initiate molecular mimicry
  • Hormonal factors: higher incidence in women, with periods of improvement during pregnancy (Th2 shift) and flares post-partum
  • Occupational exposure to silica dust and mineral oils associated with increased risk
  • Obesity increases risk by approximately 1.2–1.4 times, particularly in women

Causes and Pathophysiology

Autoimmune Synovitis

  • Initiating event: In genetically susceptible individuals (HLA-DRB1+), an unknown trigger activates autoreactive CD4+ T-helper cells that recognize self-antigens presented on synovial membrane cells. This activates macrophages and B-cells, establishing a self-perpetuating inflammatory cycle within the joint.
  • Cytokine cascade: Activated immune cells release pro-inflammatory cytokines — tumor necrosis factor-alpha (TNF-alpha), interleukin-1 (IL-1), and interleukin-6 (IL-6) — that sustain and amplify the synovial inflammation. These cytokines are the targets of modern biologic medications (anti-TNF agents, IL-6 inhibitors).
  • Synovial hypertrophy: The normally thin (1–2 cell layer) synovial membrane proliferates into a thickened, edematous, hypervascular tissue. This is what produces the characteristic "boggy" or "spongy" palpation finding in affected joints — the examiner feels thickened synovium rather than bony landmarks.

Pannus Formation and Joint Destruction

  • Pannus: The hypertrophied synovium transforms into pannus — an aggressive, invasive granulation tissue composed of fibroblasts, inflammatory cells, and new blood vessels. Pannus adheres to and invades articular cartilage from the joint margins.
  • Three-stage destruction: (1) Pannus enzymatically degrades articular cartilage via matrix metalloproteinases (MMPs) and collagenases; (2) exposed subchondral bone is eroded by osteoclasts activated by RANKL signaling from inflammatory cells; (3) supporting ligaments and joint capsule are weakened by chronic inflammation, leading to joint instability and deformity.
  • Deformity mechanisms: Destruction of the stabilizing structures of MCP and PIP joints produces the characteristic deformities:
  • Ulnar drift: weakening of the radial collateral ligaments and extensor tendons at the MCP joints allows the fingers to deviate toward the ulnar side
  • Swan-neck deformity: PIP hyperextension with DIP flexion — from intrinsic muscle tightness and volar plate laxity
  • Boutonniere deformity: PIP flexion with DIP hyperextension — from rupture of the central slip of the extensor mechanism at the PIP
  • Why small joints first: The MCP, PIP, and MTP joints have the highest ratio of synovial membrane surface area to joint volume, making them the most vulnerable to synovial-driven destruction. The wrists are also early targets for the same reason.

Systemic Manifestations

  • Extra-articular disease: RA is systemic — the same inflammatory process that attacks synovium also affects other tissues:
  • Rheumatoid nodules: firm, painless subcutaneous nodules found near pressure points (olecranon, extensor forearm, Achilles) in ~25% of seropositive patients; composed of fibrinoid necrosis surrounded by palisading histiocytes
  • Sjogren syndrome: dry eyes (keratoconjunctivitis sicca) and dry mouth from autoimmune destruction of lacrimal and salivary glands
  • Cardiovascular: pericarditis, accelerated atherosclerosis; RA patients have 1.5–2 times the cardiovascular mortality risk
  • Pulmonary: pleuritis, interstitial lung disease, pulmonary nodules
  • Vasculitis: inflammation of small and medium vessels in severe disease
  • Cervical spine involvement — critical red flag: Synovial inflammation of the atlantoaxial (C1–C2) joint can erode the transverse ligament of the atlas, allowing anterior subluxation of C1 on C2. This threatens the spinal cord and is potentially fatal. Any cervical mobility testing in an RA patient requires extreme caution.
  • Flare vs. remission cycle: RA characteristically alternates between active systemic flares (joint swelling, warmth, fatigue, malaise, elevated ESR/CRP) and periods of relative remission. The flare/remission state directly determines massage treatment approach.

Morning Stiffness Mechanism

  • Why >30 minutes: During sleep, reduced movement allows inflammatory exudate to accumulate in the synovial space and synovial membrane edema to worsen. Upon waking, the thickened, edematous synovium and accumulated fluid resist movement until the mechanical activity of using the joints gradually redistributes the fluid. In RA, this takes >30 minutes (often 1–2 hours); in OA, stiffness resolves in <30 minutes because the mechanism is mechanical (cartilage rehydration) rather than inflammatory.

Signs and Symptoms

Early / Active Disease

  • Symmetrical bilateral joint swelling, warmth, and tenderness — characteristically beginning in the MCP, PIP, and MTP joints of the hands and feet
  • Morning stiffness lasting >30 minutes, often 1–2 hours; improves with activity throughout the day
  • Positive squeeze test: pain with lateral compression across the MCP or MTP joints as a group — screens for synovitis in multiple joints simultaneously
  • General malaise, debilitating fatigue, weight loss, low-grade fever during flares
  • Elevated acute-phase reactants (ESR, CRP) and positive rheumatoid factor (RF) or anti-CCP antibodies in ~70% of patients (seropositive RA)

Chronic / Late-Stage Disease

  • Characteristic deformities of the hands: ulnar drift at MCP joints, swan-neck deformity (PIP hyperextension/DIP flexion), boutonniere deformity (PIP flexion/DIP hyperextension)
  • Z-deformity of the thumb (MCP flexion with IP hyperextension)
  • Painless rheumatoid nodules near pressure points (olecranon, extensor forearm, Achilles)
  • Muscle atrophy from disuse and reflex inhibition around affected joints
  • Joint ankylosis (bony fusion) in end-stage disease — joint becomes immobile
  • Cervical instability symptoms: occipital headache, neck pain radiating to the occiput, sensory changes in the hands — suggestive of atlantoaxial subluxation

Systemic Features

  • Sjogren syndrome (dry eyes, dry mouth)
  • Raynaud-like vasospasm in the digits
  • Felty syndrome (splenomegaly + neutropenia) — rare but serious
  • Amyloidosis in long-standing uncontrolled disease

Assessment Profile

Subjective Presentation

  • Chief complaint: "My hands are stiff and swollen every morning — it takes over an hour to loosen up." Patients often describe difficulty with grip tasks (opening jars, buttoning shirts) and symmetrical hand/foot pain that worsens with rest and improves with use.
  • Pain quality: Deep, aching joint pain with superimposed sharp pain on movement during flares; warmth and throbbing in actively inflamed joints; chronic patients report a persistent ache with intermittent flares of more intense pain
  • Onset: Insidious over weeks to months; initial involvement of MCP, PIP, and/or MTP joints bilaterally; systemic symptoms (fatigue, malaise, low-grade fever) may precede joint symptoms
  • Aggravating factors: Prolonged rest (morning stiffness), cold and damp weather (anecdotal but consistently reported), sustained grip activities, weight-bearing in lower extremity involvement
  • Easing factors: Gentle movement and activity (reduces morning stiffness by redistributing inflammatory exudate); warmth (improves stiffness during remission — but heat over acutely inflamed joints increases swelling); disease-modifying antirheumatic drugs (DMARDs) and biologics reduce systemic inflammation
  • Red flags: Cervical pain with occipital headache, upper extremity paresthesia, or signs of myelopathy (clumsiness, gait disturbance) in a known RA patient → atlantoaxial subluxation; emergency referral; do not treat cervical spine; new onset visual changes or severe headache → vasculitis screening

Observation

  • Local inspection: Symmetrical fusiform (spindle-shaped) swelling of MCP and PIP joints; redness and warmth in actively inflamed joints; ulnar drift, swan-neck, and boutonniere deformities in chronic disease; rheumatoid nodules visible at olecranon and extensor forearm; muscle atrophy of the intrinsic hand muscles (interossei, thenar/hypothenar)
  • Posture: Flexed, guarded posture of the hands and wrists; protective carrying position with elbows slightly flexed and forearms pronated; compensatory cervical forward posture from upper extremity disuse; antalgic lean if weight-bearing joints involved
  • Gait: Antalgic gait with shortened stride if MTP or knee joints involved; metatarsal pain produces forefoot avoidance (walks on heels); in advanced disease, knee valgus deformity may produce a waddling gait

Palpation

  • Tone: Muscles crossing affected joints are atrophied and weakened from reflex inhibition and disuse — particularly the interossei, thenar muscles, and forearm extensors in hand-predominant RA; compensatory hypertonicity in proximal muscles (upper trapezius, cervical extensors, forearm flexors) from altered grip mechanics and guarding; tone changes are bilateral reflecting the symmetric disease pattern
  • Tenderness: Affected joints are tender to direct palpation, particularly over the joint line; synovial hypertrophy produces a characteristic "boggy" or "spongy" quality rather than the hard bony prominence of OA; positive squeeze test tenderness (lateral compression across MCP or MTP joints en masse); rheumatoid nodules are firm but typically non-tender; periarticular tenderness extends along the tendon sheaths of the hands and wrists (tenosynovitis)
  • Temperature: Acutely inflamed joints are palpably warm — warmth indicates active synovitis and is a local contraindication for massage; cool joints in remission are appropriate for treatment; compare bilateral joints to assess asymmetric flare activity
  • Tissue quality: Synovial thickening produces a boggy, doughy quality over the joint — distinct from the hard, bony enlargement of OA (Heberden's/Bouchard's nodes); skin may be thin and fragile from long-term corticosteroid use; subcutaneous tissue may be edematous in actively inflamed areas; rheumatoid nodules are firm, rubbery, non-tender, and mobile

Motion Assessment

  • AROM: Reduced in affected joints during flares — grip strength diminished, wrist ROM limited, MCP/PIP flexion and extension restricted; morning AROM is significantly worse than afternoon AROM (>30-minute stiffness pattern); in chronic disease, deformities produce fixed ROM losses (e.g., ulnar drift limits MCP abduction/extension)
  • PROM / end-feel: During active flare: guarded/protective end-feel from pain and spasm — the patient involuntarily limits movement before anatomical end-range; in chronic fibrotic stage: firm/leathery end-feel from capsular fibrosis and adhesion; in late ankylosis: hard/bony end-feel from fusion; PROM exceeds AROM during flares (pain limits active movement more than passive) but may equal AROM in ankylosis
  • Resisted testing: Grip strength reduced bilaterally; weakness from reflex inhibition (pain inhibits voluntary contraction of muscles crossing inflamed joints) rather than primary muscle pathology; pain on resisted testing indicates active synovitis or tenosynovitis; in late disease, intrinsic hand muscle atrophy produces measurable weakness

Special Test Cluster

RA assessment relies on clinical pattern recognition (symmetrical small joint synovitis, morning stiffness >30 min, systemic symptoms) and laboratory markers (RF, anti-CCP, ESR/CRP) rather than provocative orthopedic tests. The SOT cluster below focuses on confirming synovitis distribution and screening for the most dangerous complication (cervical instability).
Test Positive Finding Purpose
MCP/MTP squeeze test (CMTO) Pain with lateral compression across the MCP or MTP joints as a group Confirm active synovitis across multiple small joints simultaneously; highly sensitive screening test for early RA
Bulge sign (knee) (CMTO) Fluid wave visible on the medial side of the patella after milking fluid from the lateral side Detect intra-articular effusion in the knee; confirms knee joint involvement
Grip strength dynamometry (CMTO) Bilateral reduction compared to age-matched norms; pain during testing Quantify functional impact; track disease progression and treatment response
Sharp-Purser test (CMTO — rule out) Excessive anterior glide of C1 on C2 with palpable "clunk" during gentle anterior pressure on C2 spinous process Screen for atlantoaxial subluxation — red flag; positive result requires emergency referral; do not treat cervical spine
Finkelstein's test (supplementary — rule out) Pain over the radial styloid with ulnar deviation of the wrist while the thumb is clasped in the fist Rule out de Quervain's tenosynovitis as a cause of wrist/thumb pain — though note RA-related tenosynovitis can produce a positive result
Note: If the patient reports cervical symptoms (occipital headache, upper limb paresthesia, gait instability), add alar ligament stress test and neurological screen for upper extremity before any cervical treatment. Cervical instability testing takes priority over all other assessment in known RA patients with neck complaints.

Differential Diagnoses

Condition Key Distinguishing Feature
Osteoarthritis (OA) Asymmetrical; large weight-bearing joints predominant; DIP involvement (Heberden's nodes); morning stiffness <30 minutes; no systemic symptoms; hard bony enlargement rather than boggy synovial swelling
Psoriatic Arthritis Asymmetrical; DIP joint predominant (unlike RA which spares DIPs); associated psoriatic skin/nail changes; dactylitis ("sausage digits"); negative RF
Gout Acute monoarticular onset (typically 1st MTP — podagra); exquisitely tender, red, hot joint; needle-shaped monosodium urate crystals on aspiration; elevated serum uric acid; male predominance
Systemic Lupus Erythematosus Joint pain without erosive destruction (Jaccoud's arthropathy is non-erosive); malar butterfly rash; positive ANA/anti-dsDNA; multi-system involvement (renal, CNS); young women
Fibromyalgia Widespread pain without joint swelling or warmth; tender points rather than synovitis; normal inflammatory markers (ESR, CRP); no radiographic joint changes

CMTO Exam Relevance

  • CMTO Appendix category A1 (MSK conditions) — one of the most commonly tested autoimmune conditions
  • Critical differential pair: RA vs. OA — symmetrical vs. asymmetrical; small joints vs. large joints; systemic vs. local; morning stiffness >30 min vs. <30 min; boggy swelling vs. bony enlargement; elevated ESR/CRP vs. normal
  • Know the ACR/EULAR classification criteria: score of 6 or greater from joint involvement, serology (RF, anti-CCP), acute-phase reactants (ESR, CRP), and symptom duration
  • Red flag: Cervical RA causing atlantoaxial subluxation — Sharp-Purser test, alar ligament test; high-velocity cervical manipulation is potentially life-threatening
  • Know systemic complications: Sjogren syndrome, pericarditis, pleuritis, vasculitis, rheumatoid nodules
  • Understand the flare vs. remission distinction as it directly determines whether massage is indicated (remission) or contraindicated (systemic flare)
  • Know biologic medication classes (TNF inhibitors, IL-6 inhibitors, JAK inhibitors) and their implications for MT: immunosuppression, injection site avoidance, infection risk

Massage Therapy Considerations

  • Primary therapeutic target: secondary muscle tension, joint stiffness, and compensatory patterns that develop around chronically inflamed joints — MT does not treat the autoimmune synovitis itself but addresses its musculoskeletal consequences during remission
  • Flare vs. remission — the defining treatment decision:
  • Active systemic flare (fatigue, malaise, elevated ESR/CRP, multiple joints warm and swollen): systemic massage is contraindicated — the inflammatory burden is too high and massage may worsen systemic inflammation
  • Acutely inflamed individual joints (warm, swollen, tender): local massage over the joint is contraindicated even during overall remission — work proximal and distal to the inflamed joint
  • Remission (joints cool, minimal swelling, manageable stiffness): massage is indicated and beneficial for maintaining ROM, reducing compensatory tension, and managing stress
  • Sequencing logic: Address compensatory proximal tension first (upper trapezius, cervical extensors, forearm flexors from altered grip mechanics), then work toward the affected joints with gentle periarticular techniques — guarding from pain defeats access to periarticular tissues if proximal tension is not reduced first
  • Safety / contraindications:
  • Tissues are structurally weakened by both the disease process (ligament erosion, capsular laxity) and long-term corticosteroid use (skin fragility, easy bruising, subcutaneous tissue thinning, osteoporosis)
  • Use generous lubrication to avoid shearing fragile skin; fully support joints in neutral position during treatment
  • Do not perform joint mobilization on unstable or actively inflamed joints
  • Cervical spine: In any known RA patient, screen for cervical involvement before cervical treatment; if atlantoaxial instability is suspected or confirmed, cervical mobilization and deep cervical work are absolutely contraindicated
  • Biologic medications (adalimumab/Humira, etanercept/Enbrel, infliximab/Remicade) and JAK inhibitors (tofacitinib/Xeljanz) suppress the immune system — do not treat if you have an active infection; avoid direct pressure over recent injection sites (thigh, abdomen, upper arm)
  • Medication masking: corticosteroids and analgesics reduce pain perception, increasing the risk of overtreatment — use conservative pressure and rely on tissue quality assessment rather than pain feedback alone
  • Nutrient depletion note: RA medications create an ironic depletion cascade. Methotrexate depletes folate (usually co-prescribed, but verify). Corticosteroids deplete calcium and vitamin D, accelerating bone loss — the drug that manages the disease simultaneously creates osteoporosis risk. Clients on long-term corticosteroids for RA should be treated with osteoporosis precautions. Biologics create immunosuppression and infection risk but are not significant nutrient depleters. See pharmacology-for-massage-therapists/drug-nutrient-depletion-reference.
  • Heat/cold guidance: Moist heat during remission improves stiffness and palpability of periarticular tissues; heat is contraindicated over acutely inflamed (warm, swollen) joints as it increases vasodilation and swelling; cold application over acutely inflamed joints may provide symptomatic relief; contrast hydrotherapy appropriate for chronic stiffness in remission

Treatment Plan Foundation

Clinical Goals

  • Reduce compensatory muscle tension in proximal musculature (upper trapezius, cervical extensors, forearm flexors) developed from altered joint mechanics
  • Maintain periarticular soft tissue mobility around affected joints to preserve functional ROM
  • Support peripheral circulation in edematous extremities
  • Provide parasympathetic activation and stress reduction — chronic pain and disease unpredictability generate significant psychosocial stress

Position

  • Supine or side-lying preferred — hands and wrists can be positioned in neutral with bolstering support
  • Bolster under wrists and hands to maintain neutral alignment and prevent gravitational stress on lax MCP joints
  • If prone, ensure face cradle does not compress any cervical joints and forearms/hands are supported in neutral
  • Avoid positions requiring sustained grip or weight-bearing through affected joints

Session Sequence

  1. General effleurage to upper back and posterior cervical region — assess compensatory tension patterns; note any guarding or warmth suggesting flare activity before proceeding
  2. Upper trapezius and levator scapulae release — address the most common compensatory overload pattern from chronic upper extremity guarding; sustained compression and longitudinal stripping within pain-free tolerance
  3. Forearm extensor and flexor release — address chronic overload from altered grip mechanics; gentle longitudinal stripping and cross-fiber work; generous lubrication over potentially fragile skin
  4. Periarticular gentle effleurage and friction around wrist joints — [remission only; skip if any warmth or swelling detected] — improve local circulation and maintain capsular mobility
  5. Gentle MCP and PIP periarticular mobilization through soft tissue — [remission only; non-inflamed joints only] — maintain periarticular tissue extensibility; support joints in neutral throughout
  6. Lower extremity compensatory work if MTP or knee joints involved — address gastrocnemius/soleus overload from forefoot avoidance gait pattern; proximal hamstring and quadriceps tension from altered weight-bearing
  7. Gentle return effleurage with progressive reduction of pressure — complete the session with parasympathetic emphasis; reassess any areas that were warm or guarded at intake

Adjunct Modalities

  • Hydrotherapy: Pre-treatment moist heat to forearms and upper back during remission to improve tissue pliability (5–10 minutes); do NOT apply heat over any joint that is warm to palpation; cold pack post-treatment over any joint that became reactive during session; contrast hydrotherapy (warm/cool alternating) appropriate for chronically stiff hands in remission
  • Joint mobilization: Gentle Grade I–II accessory glides of wrist and MCP joints [remission only; non-inflamed, non-unstable joints only]; direction of restricted glide as assessed by end-feel; contraindicated in any joint with active synovitis, known erosion, or suspected instability; cervical mobilization contraindicated if any cervical involvement suspected
  • Remedial exercise (on-table): Gentle active-assisted ROM of wrist and fingers through available range — therapist supports the hand while the client performs flexion/extension and radial/ulnar deviation through pain-free range; purpose is to maintain functional ROM and counteract stiffness; [remission only]

Exam Station Notes

  • Demonstrate the flare vs. remission decision — palpate for warmth and swelling before selecting treatment depth; state aloud: "This joint is cool and non-swollen, so I can work periarticularlly" or "This joint is warm and swollen — I will avoid it and work proximally"
  • If the scenario involves a known RA patient, screen for cervical involvement before any cervical work — ask about headaches, paresthesia, neck symptoms
  • Use generous lubrication and demonstrate tissue-conscious pressure — state awareness of steroid-related skin fragility
  • Show bilateral comparison of joint warmth, swelling, and ROM to document asymmetric flare activity

Verbal Notes

  • Medication and injection sites: at intake, ask about current medications — "Are you on any biologic injections? If so, where are your injection sites? I'll avoid direct pressure over those areas."
  • Pressure calibration with medication masking: "Your medications may affect how much pressure you feel. I'm going to start lighter than you might expect and increase gradually. If anything feels uncomfortable tomorrow, let me know at our next session so I can adjust."
  • Joint protection during treatment: "I'm going to support your hand and wrist in a comfortable position throughout. If any position causes discomfort, let me know immediately — I don't want any strain on your joints."
  • Flare monitoring: "If you've been having a flare-up — joints feeling hot, swollen, or more fatigued than usual — let me know before we start. It changes what I can safely do during our session."

Self-Care

  • Gentle daily hand exercises in warm water — finger flexion/extension, grip/release exercises using a soft ball or putty; warmth from the water reduces stiffness and makes movement easier
  • Joint protection strategies: use ergonomic grips on tools and utensils; avoid sustained pinch grip; distribute loads across larger joints (carry bags on forearms rather than in hands)
  • Pacing and energy conservation: distribute demanding tasks throughout the day and week; rest before fatigue becomes severe rather than pushing through
  • Report new cervical symptoms immediately (headache at the base of the skull, tingling in hands, clumsiness) — these may indicate atlantoaxial instability requiring urgent evaluation

Key Takeaways

  • RA is a systemic autoimmune disease characterized by symmetrical bilateral synovitis and pannus formation that destroys cartilage, bone, and ligaments — beginning in the small joints (MCP, PIP, MTP) and progressing to deformity (ulnar drift, swan-neck, boutonniere)
  • Morning stiffness >30 minutes is the key clinical differentiator from OA (stiffness <30 min) — it results from overnight accumulation of inflammatory exudate in synovial joints
  • The flare vs. remission state is the single most important treatment decision: systemic flare contraindicates systemic massage; acutely inflamed individual joints contraindicate local massage; remission permits full treatment
  • Cervical RA can cause atlantoaxial subluxation (C1–C2 instability) — a potentially fatal red flag; Sharp-Purser test is mandatory before any cervical work in a known RA patient
  • Tissues are structurally weakened by both disease erosion and long-term corticosteroid use — use generous lubrication, support joints in neutral, and rely on tissue assessment rather than pain feedback (medication masking)
  • The squeeze test (lateral MCP/MTP compression) is the highest-yield screening test for active RA synovitis across multiple joints simultaneously
  • Biologic medications suppress the immune system — avoid treating if the therapist has an active infection; avoid direct pressure over injection sites

Sources

  • Rattray, F., & Ludwig, L. (2000). Clinical massage therapy: Understanding, assessing and treating over 70 conditions. Talus Incorporated.
  • Werner, R. (2012). A massage therapist's guide to pathology (5th ed.). Lippincott Williams & Wilkins.
  • Porth, C. M. (2014). Essentials of pathophysiology: Concepts of altered states (4th ed.). Lippincott Williams & Wilkins.
  • Magee, D. J., & Manske, R. C. (2021). Orthopedic physical assessment (7th ed.). Elsevier.
  • Vizniak, N. A. (2020). Quick reference evidence-informed orthopedic conditions. Professional Health Systems.
  • Cowen, V. S. (2016). Pathophysiology for massage therapists: A functional approach. F.A. Davis.
  • Pelton, R., LaValle, J. B., Hawkins, E. B., & Krinsky, D. L. (2001). Drug-induced nutrient depletion handbook (2nd ed.). Lexi-Comp.