McMurray and Apley grind tests for meniscus tears: clinical technique, sensitivity, and rehabilitation
In short
The McMurray test and Apley grind test are standard clinical provocative maneuvers used by orthopedic physiotherapists to detect torn knee menisci. Learn the biomechanical mechanism, hand placement, sensitivity, specificity, and non-operative rehabilitation protocols.
In this guide (7 sections)
Meniscal anatomy and mechanics of rotational tearing
The medial and lateral menisci are crescent-shaped fibrocartilaginous structures that disperse axial load, absorb shock, and stabilize the tibiofemoral joint. The medial meniscus is broader, less mobile, and attached firmly to the medial collateral ligament (MCL) and joint capsule, making it roughly three times more susceptible to injury than the more circular, mobile lateral meniscus.
Meniscal tears typically occur when an axial load combines with sudden rotation while the foot is planted, common during cricket fielding, badminton lunges, and football pivots. In middle-aged and older adults, degenerative cleavage tears occur under minimal trauma, often during floor sitting, deep squatting, or rising from low seating.
How to perform the McMurray test correctly
The McMurray test aims to trap the displaced posterior horn of the meniscus between the femoral condyle and tibial plateau as the knee is extended from full flexion.
| Examination Step | Medial Meniscus Testing | Lateral Meniscus Testing | |
|---|---|---|---|
| Starting Position | Patient supine, knee fully flexed past 90 degrees. | Patient supine, knee fully flexed past 90 degrees. | |
| Hand Placement | One hand cups the heel; index finger and thumb palpate the medial joint line. | One hand cups the heel; fingers palpate the lateral joint line. | |
| Rotational Stress | Externally rotate the tibia and apply a gentle valgus stress to open the medial joint space. | Internally rotate the tibia and apply a gentle varus stress to open the lateral compartment. | |
| Extension Phase | Slowly extend the knee while maintaining external rotation and valgus stress. | Slowly extend the knee while maintaining internal rotation and varus stress. | |
| Positive Sign | A palpable or audible click, snap, or localized pain along the medial joint line. | A reproducible snap, thud, or sharp pain along the lateral joint line. |
A genuine positive McMurray test requires a distinct mechanical click or thud accompanied by pain along the joint line. Pain alone without mechanical locking or click has higher false-positive rates due to patellofemoral irritation or medial plica friction.
How to perform the Apley grind test (Distraction vs Compression)
Described by Alan Graham Apley, this test differentiates between ligamentous sprains (collateral ligaments) and meniscal lesions by comparing pain under distraction versus pain under axial compression.
| Test Phase | Manoeuvre Details | Clinical Interpretation | |
|---|---|---|---|
| Patient Setup | Patient lies prone on the examination couch with the knee flexed to 90 degrees. Examiner stabilizes the posterior thigh with their knee. | Isolates the tibiofemoral joint and eliminates hip compensatory rotation. | |
| Phase 1: Distraction | Examiner grasps the ankle, pulls the lower leg upward towards the ceiling, and rotates the tibia internally and externally. | Tenses collateral ligaments while unloading menisci. Increased pain suggests collateral ligament sprain, not a meniscus tear. | |
| Phase 2: Compression (Grind) | Examiner pushes straight down along the long axis of the tibia while rotating the foot internally and externally. | Compresses the menisci between tibia and femur. Pain, catching, or decreased rotation confirms meniscal pathology. |
Diagnostic accuracy: sensitivity, specificity, and the composite cluster
Orthopedic research demonstrates that individual physical tests have limited diagnostic accuracy when used in isolation. Systemic review evidence from the Journal of Bone and Joint Surgery (JBJS) establishes the following metrics:
- McMurray Test Accuracy: Sensitivity ranges between 61% and 70%, with specificity between 77% and 84%. It performs best for complex and bucket-handle tears.
- Apley Grind Test Accuracy: Sensitivity is lower at 38% to 60%, but specificity is high at 80% to 90%. It is very useful for ruling in meniscal lesions when positive.
- Joint Line Tenderness: High sensitivity (83%), but lower specificity (67%). Excellent screening tool when combined with rotational tests.
- The Composite Meniscus Cluster: When 5 signs are present (history of joint locking, joint line tenderness, positive McMurray, pain with maximum passive flexion, pain with maximum passive extension), positive predictive value rises to 92%.
Conservative physiotherapy protocol for meniscal tears
Not all meniscal tears require arthroscopic debridement or surgical repair. The outer third of the meniscus (the red-red zone) has vascular supply and can heal with conservative targeted physiotherapy. Degenerative horizontal cleavages often respond well to non-operative strengthening.
- Swelling Control and Cryotherapy: Effusion inhibits the vastus medialis obliquus (VMO). Compression wrapping and cold packs restore quadriceps voluntary activation.
- Non-Weight Bearing Range of Motion: Heel slides on a smooth surface maintain joint lubrication without placing compressive rotational shear on the torn edge.
- Quadriceps and Hip Abductor Strengthening: Straight leg raises with a 10-second hold, terminal knee extensions with elastic resistance, and side-lying hip abductions unload the medial compartment.
- Proprioception and Balance Retraining: Single-leg stance on a firm floor progressing to wobble balance pads re-educates knee mechanoreceptors and prevents reinjury.
Frequently asked clinical questions
Can an MRI be wrong if the McMurray test is positive?
MRI has high sensitivity (approx 93%) for meniscal tears. However, false positives are common in asymptomatic adults over 40 where degenerative changes appear on MRI but cause no clinical symptoms. A positive clinical test must correlate with actual localized joint symptoms before deciding on invasive interventions.
How long does conservative physiotherapy take for a meniscus tear?
A standard non-operative physiotherapy program runs for 6 to 12 weeks. Most patients with degenerative or minor traumatic tears experience marked reduction in pain and return to everyday functional mobility without surgery.
Evidence sources and clinical references
- Journal of Bone and Joint Surgery (JBJS): Diagnostic accuracy of clinical tests for meniscus tears: https://jbjs.org
- Journal of Orthopaedic and Sports Physiotherapy: Knee meniscus rehabilitation: https://jospt.org
- Indian Association of Physiotherapists: Musculoskeletal Clinical Practice Guidelines: https://physiotherapyindia.org
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