How to Perform a Musculoskeletal Assessment

Mobility is central to independence. The musculoskeletal system provides the framework for movement and protection for vital organs. Assessment of bones, joints, and muscles detects functional deficits, injury, and degenerative diseases like osteoporosis. Unlike other systems, this exam relies heavily on patient cooperation and active movement. For nursing students, mastering range of motion (ROM) and strength grading is essential for safe patient handling and discharge planning. This guide details the systematic approach to musculoskeletal evaluation, covering structure, function, and neurovascular status.

1. Inspection: Posture, Gait, and Symmetry

Assessment begins as the patient enters the room. Observe Gait (walking pattern) for stability.

• Normal Gait: Steady, smooth, rhythmic. Arm swing is symmetric.
• Antalgic Gait: Shortened stance phase on the affected side (limping due to pain).
• Ataxic Gait: Unsteady, uncoordinated walk with a wide base (Cerebellar dysfunction).
• Parkinsonian Gait: Shuffling, stooped posture, reduced arm swing.

Spinal Curvature Assessment

Inspect the spine from the side and back. Perform the Adam’s Forward Bend Test (patient bends at waist) to screen for scoliosis.

• Normal Curves: Cervical concave, Thoracic convex, Lumbar concave.
• Kyphosis: Exaggerated thoracic curvature (“Hunchback”). Common in elderly and osteoporosis.
• Lordosis: Exaggerated lumbar curvature (“Swayback”). Common in pregnancy and toddlers.
• Scoliosis: Lateral S-shaped curvature. Look for uneven shoulder height or scapular prominence.

According to the American Academy of Orthopaedic Surgeons (AAOS), early detection of spinal deformities prevents long-term respiratory complications.

2. Palpation and Neurovascular Assessment

Palpate all major joints (shoulders, elbows, wrists, hips, knees, ankles) bilaterally for symmetry.

• Temperature: Warmth indicates inflammation (arthritis/infection). Use the dorsal hand surface.
• Tenderness: Localized pain suggests injury or pathology. Distinguish bone pain from muscle pain.
• Crepitus: Audible/palpable crunching sensation. Indicates roughened articular surfaces (Osteoarthritis) or bone-on-bone contact.
• Effusion: Fluid within the joint capsule. Palpable “bogginess” or fluctuance.

The 5 P’s (Neurovascular Check)

Crucial for fractures or post-op patients to rule out Compartment Syndrome.

• Pain: Out of proportion to injury?
• Pulse: Distal pulses present?
• Pallor: Color/temperature changes.
• Paresthesia: Numbness/tingling.
• Paralysis: Inability to move.

3. Range of Motion (ROM)

Assess joint mobility. Differentiate between Articular pathology (limits both active/passive ROM) and Non-Articular pathology (limits active but not passive).

• Active ROM: Patient moves independently. Tests muscle strength and coordination.
• Passive ROM: Nurse moves the relaxed joint. Tests joint stability and capsule integrity.

Key Movements

• Flexion/Extension: Bending and straightening (Knee, Elbow).
• Abduction/Adduction: Moving away/toward midline (Hip, Shoulder).
• Pronation/Supination: Palm down/up (Forearm).
• Dorsiflexion/Plantar Flexion: Toes up/down (Ankle).
• Inversion/Eversion: Sole in/out (Ankle).
• Internal/External Rotation: Rotation towards/away from center (Hip, Shoulder).

Safety Note: Do not force a joint beyond its comfort zone. Stop if pain or resistance occurs.

4. Muscle Strength Grading

Test strength by asking the patient to move against your resistance. Grade on a standard 0-5 scale. Isolate specific muscle groups (e.g., “Squeeze my fingers,” “Push against my hands like a gas pedal”).

• 5 (Normal): Full ROM against gravity, full resistance.
• 4 (Good): Full ROM against gravity, some resistance.
• 3 (Fair): Full ROM against gravity, no resistance. Patient cannot overcome opposition.
• 2 (Poor): Full ROM with gravity eliminated (passive motion or horizontal movement).
• 1 (Trace): Slight contraction visible/palpable, no joint movement.
• 0 (Zero): No contraction. Paralysis.

5. Special Tests

Use these to identify specific pathologies.

• Phalen’s Test (Carpal Tunnel): Flex wrists 90 degrees (back of hands touching) for 60 seconds. Numbness/tingling = Positive.
• Tinel’s Sign (Carpal Tunnel): Tap median nerve at wrist. Tingling (“pins and needles”) = Positive.
• Drop Arm Test (Rotator Cuff): Abduct arm to 90 degrees and lower slowly. Immediate drop or pain = Positive for tear.
• Straight Leg Raise (Sciatica): Lift patient’s leg while supine. Radiating pain down the leg (not just back pain) suggests lumbar disc herniation.
• McMurray’s Test (Meniscus): Rotate knee while extending. A “click” or pain indicates a meniscal tear.

Documentation Standards

Example: “Gait steady, even rhythm. Spine midline with normal curvature; negative scoliosis screen. No joint deformity, heat, or erythema. Full Active ROM in all extremities without crepitus. Muscle strength 5/5 bilateral upper and lower extremities. Radial and pedal pulses 2+ palpable. Capillary refill <2 seconds. Negative Phalen's test."

FAQs on Musculoskeletal Exam

Conclusion

Musculoskeletal assessment ensures patients maintain independence and safety. By systematically evaluating structure, function, and neurovascular status, nurses identify deficits that require intervention, from fall prevention to rehabilitation referrals.