7.4 Orthopedic Examination: Thoracic Spine

7.4 Orthopedic Examination: Thoracic Spine

Quick Answer: Thoracic orthopedic examination on NBCE Part II focuses on costovertebral and costotransverse joint mobility, segmental springing, chest expansion screening, and differentiation of mechanical thoracic pain from visceral pathology. The thoracic region is the most rigid section of the spine (rib cage constraint), so Part II items test whether you can identify segmental restriction, inflammatory spondyloarthropathy, and chest wall pain generators — while recognizing when thoracic pain demands medical referral instead of manipulation.

Why Thoracic Orthopedic Testing Matters on Part II

Thoracic complaints account for a smaller share of daily chiropractic practice than cervical or lumbar pain, but Part II disproportionately tests the clinical reasoning around thoracic pain because the differential is broad: mechanical (costovertebral fixation, costochondritis, Scheuermann's kyphosis), inflammatory (ankylosing spondylitis), and visceral (cardiac, pulmonary, esophageal, renal). Orthopedic and palpation tests help confirm mechanical sources when the history supports them and red flags are absent.

Rib Springing (Motion) Test

Procedure: With the patient prone or seated, the examiner contacts the transverse process or rib angle at a specific thoracic level and applies a gentle posterior-to-anterior springing force, assessing the end-feel and patient response at each segment.

Positive finding: Focal pain and/or a restricted, boggy, or absent spring compared with adjacent levels — indicating a fixated costovertebral or costotransverse joint.

Indicates: Segmental thoracic joint dysfunction (subluxation/fixation), rib contusion, or costovertebral sprain.

Sensitivity caveat: Interexaminer reliability for motion palpation is moderate at best. A single restricted level on springing alone is suggestive but not definitive — Part II expects correlation with focal palpation tenderness and pain reproduced by the same motion that stresses the segment during daily activity (rotation, deep inspiration).

False positive: Generalized paraspinal muscle guarding from non-segmental myofascial pain can feel restricted at multiple levels without a true joint fixation.

Chest Expansion Test

Procedure: Measure the circumference of the chest at the level of the fourth intercostal space (or xiphoid) at maximal exhalation, then at maximal inhalation.

Positive finding: Expansion of less than approximately 2 inches (5 cm).

Indicates: Restricted costovertebral mobility — classically associated with ankylosing spondylitis and other inflammatory spondyloarthropathies (psoriatic arthritis, reactive arthritis).

Sensitivity caveat: Reduced chest expansion is a screening finding, not diagnostic alone. Confirm with history (morning stiffness >30 minutes, improvement with activity, age of onset <40, family history) and imaging (sacroiliitis on radiograph or MRI). Normal chest expansion does not exclude early ankylosing spondylitis.

Clinical pearl: In ankylosing spondylitis, the thoracic kyphosis increases and chest expansion decreases as costovertebral joints ankylose — pair this test with the modified Schober's test for lumbar flexion loss.

Seated Thoracic Rotation Test

Procedure: Patient seated with arms crossed over the chest. The examiner stabilizes the pelvis and rotates the thorax to each side, or the patient actively rotates while the examiner palpates segmental motion.

Positive finding: Asymmetric rotation with pain at a specific thoracic level, or reproduction of the patient's chief complaint during rotation toward the restricted side.

Indicates: Segmental thoracic hypomobility, costotransverse restriction, or intercostal strain.

False positive: Global thoracic stiffness from deconditioning or generalized myofascial tightness without a focal segmental lesion.

Prone Thoracic Extension (Compression) Test

Procedure: Patient prone. The examiner applies anterior pressure over the spinous processes or paraspinal muscles at specific thoracic levels while the patient extends the thoracic spine, or applies posterior-to-anterior pressure at each segment.

Positive finding: Localized pain at a specific vertebral level during extension or compression.

Indicates: Thoracic facet irritation, costovertebral sprain, or compression fracture (if trauma history present).

Red-flag integration: Focal midline tenderness after significant trauma with a positive compression test raises compression fracture suspicion — especially in osteoporosis or prolonged corticosteroid use. Image before manipulation.

Costochondral and Chest Wall Provocation

Costochondral Palpation

Procedure: Palpate the costochondral and costosternal junctions, particularly ribs 2–5.

Positive finding: Focal reproducible tenderness at the costochondral junction.

Indicates: Costochondritis (Tietze syndrome if swelling is present at a single costochondral junction).

Sensitivity caveat: Costochondritis is a diagnosis of exclusion — reproducible focal tenderness without swelling, normal cardiac and pulmonary workup, and pain worsened by movement and deep inspiration. Part II may present costochondritis alongside cardiac red flags; always rule out cardiac causes when pain is exertional or associated with diaphoresis and dyspnea.

First Rib Mobility Test

Procedure: Supine or seated. The examiner palpates the first rib in the supraclavicular fossa and assesses superior/inferior mobility with respiration, or applies gentle superior-to-inferior pressure.

Positive finding: Restricted first rib motion (failure to descend with inspiration) and/or reproduction of upper thoracic, neck, or arm symptoms.

Indicates: Elevated/fixated first rib — associated with thoracic outlet syndrome, scalene hypertonicity, and upper thoracic dysfunction.

Correlation: Pair with Adson's and Roos tests when TOS is suspected. First rib restriction alone does not diagnose TOS but may contribute to the symptom complex.

Scheuermann's Disease vs. Postural Kyphosis

Part II may describe a young patient (adolescent male) with increased thoracic kyphosis and ask you to distinguish structural from postural causes:

Part II Clinical Scenario: Mechanical vs. Visceral Thoracic Pain

A 28-year-old teacher reports left-sided thoracic pain for 5 days after reaching overhead to shelve books. Pain is sharp, focal at the T6–T7 paraspinal region, worse with rotation and deep inspiration, and reproduced by rib springing at T6–T7. There is no fever, cough, exertional component, or cardiac risk factors. Vital signs are normal.

This presentation supports costovertebral joint dysfunction at T6–T7. The focal reproducibility with springing, mechanical aggravation, and absence of visceral red flags distinguish it from pulmonary, cardiac, or infectious causes. If the same patient had fever, productive cough, and pleuritic pain, pulmonary infection would supersede the mechanical diagnosis regardless of focal tenderness.

Thoracic Red Flags That Override Orthopedic Findings

Before interpreting any positive thoracic orthopedic test, confirm red flags are absent:

• Cardiac: exertional pain, diaphoresis, radiation to jaw or left arm, syncope
• Pulmonary: fever, cough, hemoptysis, dyspnea at rest, pleuritic pain without mechanical reproducibility
• Aortic: sudden tearing pain, pulse differential, history of hypertension or Marfan syndrome
• Malignancy: night pain, weight loss, history of cancer, age >50 with new unremitting pain
• Fracture: trauma, osteoporosis, corticosteroid use, focal midline tenderness

Test Clustering and Part II Strategy

Thoracic orthopedic testing on Part II is ultimately a safety and localization exercise: confirm the pain is mechanical, focal, and reproducible before selecting manipulation — and recognize when the same regional pain pattern demands referral instead.