7.1 NMS Case History
Key Takeaways
- The NMS case history is the highest-weighted subtopic within Neuromusculoskeletal Diagnosis on Part II, accounting for roughly 18% of that domain.
- OPQRST and OLDCARTS mnemonics structure onset, quality, radiation, severity, timing, and modifying factors for spine and extremity complaints.
- Mechanism of injury, aggravating positions, and relieving positions separate discogenic, facet-mediated, and radicular pain patterns before any orthopedic testing.
- Red-flag screening (cauda equina, fracture, infection, malignancy, vascular compromise) must be completed during history before proceeding to provocative testing.
- Part II vignettes reward correlating historical clues — dermatomal radiation, Valsalva worsening, night pain, systemic symptoms — with the most likely structural diagnosis.
7.1 NMS Case History
Quick Answer: On NBCE Part II, the neuromusculoskeletal (NMS) case history is not a paperwork exercise — it is the diagnostic engine that drives roughly 18% of the Neuromusculoskeletal Diagnosis domain. Part II items present a partial history and ask you to predict the most likely pain generator, identify a red flag that changes management, or choose the finding that best supports a disc versus facet versus radicular pattern. Master structured mnemonics (OPQRST, OLDCARTS), mechanism-of-injury reasoning, and the historical features that separate mechanical spine pain from conditions requiring referral.
Why the NMS History Dominates Part II
Part II tests clinical sciences, not isolated anatomy recall. Within the Neuromusculoskeletal Diagnosis category (20% of the full exam), case history alone carries approximately 18% of that domain's weight — making it one of the highest-yield NMS subtopics on the entire test. Exam vignettes typically give you a chief complaint plus a handful of historical details and then ask: What is the most likely diagnosis? Which additional history question is most important? Which finding is a contraindication to manipulation today?
A well-taken history should let you predict exam findings before you touch the patient. If the history describes sudden onset after axial loading with pain worse on coughing and radiation below the knee, you should already be thinking lumbar disc herniation with nerve root tension — not sacroiliac sprain.
Structuring the Present Illness: OPQRST and OLDCARTS
Two mnemonics organize the history of present illness (HPI) for NMS complaints:
OPQRST — Onset, Provocation/Palliation, Quality, Region/Radiation, Severity, Timing.
OLDCARTS — Onset, Location, Duration, Character, Aggravating factors, Relieving factors, Timing, Severity.
Both capture the same high-yield data. For Part II, prioritize these NMS-specific details within whichever mnemonic you use:
| Historical Element | What to Document | Diagnostic Value |
|---|---|---|
| Onset | Sudden (trauma, lift) vs. gradual (degenerative) vs. insidious (systemic) | Sudden axial load favors acute disc or fracture; gradual morning stiffness favors inflammatory spondyloarthropathy |
| Mechanism of injury (MOI) | Direction of force, position of spine, head/neck position at impact | Hyperextension-rotation cervical MOI raises facet and vascular concerns; flexion-rotation loading raises disc probability |
| Quality | Sharp, dull, burning, electric, deep ache | Electric or shock-like quality suggests nerve root or cord irritation; deep boring night pain raises malignancy concern |
| Radiation | Dermatomal arm/leg pattern vs. sclerotomal referral vs. myofascial spread | True radiculopathy follows a dermatome; facet pain refers in a sclerotomal band without dermatomal numbness |
| Aggravating factors | Flexion, extension, rotation, cough/sneeze (Valsalva), overhead work | Valsalva worsening suggests space-occupying disc; extension-rotation worsening suggests facet loading |
| Relieving factors | Rest, flexion (shopping-cart sign), distraction, position change | Neurogenic claudication relieved by sitting/flexion but not by simply standing still points to spinal stenosis, not vascular claudication |
| Timing | Constant vs. intermittent; morning vs. evening; progressive | Progressive neurological symptoms over days demand urgent workup regardless of pain severity |
Pattern Recognition: Disc, Facet, and Radicular Pain from History Alone
Part II frequently tests whether you can distinguish three overlapping mechanical patterns from historical clues alone:
Discogenic pain typically presents with flexion intolerance, central or paramedian low back pain, and worsening with sitting, coughing, or straining (Valsalva maneuvers increase intrathecal pressure). When the disc compresses a nerve root, the history adds dermatomal radiation, paresthesia, and sometimes myotomal weakness described by the patient ("I keep dropping things" for C7, "my foot drags" for L5).
Facet-mediated pain is often extension- and rotation-intolerant, worse when rising from a chair or looking up, and refers in a non-dermatomal sclerotomal pattern (cervical facet pain may refer to the periscapular region; lumbar facet pain may refer to the buttock and posterior thigh without crossing below the knee in a true radicular band).
Radiculopathy is defined by nerve root involvement: the history must include sensory change, weakness, or reflex change in a segmental distribution, not merely "pain that shoots down the leg." Hamstring tightness causing posterior thigh pain on forward bending is not radiculopathy — the pain must follow a nerve root territory and correlate with neurological symptoms.
Part II Clinical Scenario
A 42-year-old office worker reports 2 weeks of neck pain after sleeping with the head turned sharply to the left. Pain is dull and aching at the base of the skull and upper trapezius, worse when looking up or turning right, and relieved by forward flexion and heat. There is no arm pain, numbness, or weakness, and no headache, dizziness, or visual changes. Which historical feature most strongly supports a facet-mediated cervical source rather than disc radiculopathy?
The answer hinges on extension-rotation aggravation without dermatomal arm symptoms — classic facet history. A disc herniation with root compression would more often add arm radiation, paresthesia, or Valsalva sensitivity.
Red-Flag and Yellow-Flag Screening
Every NMS history on Part II must include systematic red-flag screening before orthopedic provocation:
| Red Flag | Historical Clue | Action |
|---|---|---|
| Cauda equina syndrome | Saddle anesthesia, bowel/bladder dysfunction, bilateral leg weakness, progressive perineal numbness | Emergency surgical referral — not manipulation |
| Fracture | High-energy trauma, osteoporosis, prolonged corticosteroid use, age >50 with new acute pain | Imaging before manipulation |
| Infection | Fever, IV drug use, recent spinal procedure, immunosuppression, night sweats | Labs and imaging; no manipulation until ruled out |
| Malignancy | Unexplained weight loss, history of cancer, night pain unrelieved by position, age >50 with new pain | Imaging and medical referral |
| Vascular compromise | Vertebrobasilar symptoms (5 Ds: dizziness, diplopia, dysarthria, dysphagia, drop attacks; plus nausea, nystagmus, numbness) | No cervical HVLA; urgent vascular evaluation |
| Abdominal aortic aneurysm | Pulsatile abdominal mass history, age >65, smoking, sudden severe back pain | Emergency referral |
Yellow flags (psychosocial barriers to recovery — catastrophizing, fear-avoidance, work dissatisfaction) do not mandate emergency referral but signal that prognosis and management planning must address psychosocial factors, not only biomechanics.
Regional History Pearls: Cervical, Thoracic, and Chest Wall
Cervical history must clarify whether symptoms are local neck pain, referred headache, radicular arm pain, or myelopathic (hand clumsiness, gait change, bowel/bladder change with upper motor neuron signs on exam). Ask about TOS symptoms (arm heaviness with overhead activity, nocturnal paresthesia in the ulnar digits) and TMJ contribution (clicking, locking, preauricular pain).
Thoracic history distinguishes costovertebral joint pain (focal, movement-related, palpable rib tenderness) from visceral referred pain (cardiac, pulmonary, esophageal, renal). Key questions: Is pain pleuritic (worse with deep inspiration)? Is it exertional (cardiac)? Is there fever or cough (pulmonary infection)? Thoracic pain that is sharp, reproducible with palpation, and absent at rest favors musculoskeletal origin.
Chest wall and rib history should document trauma (seatbelt, contact sport), repetitive cough (costochondritis), and unilateral breathing restriction (fixated rib).
Prior History, Functional Status, and Review of Systems
Part II also tests whether you integrate past medical history into NMS reasoning:
- Prior episodes of the same complaint suggest recurrent mechanical dysfunction or incomplete rehabilitation.
- Prior imaging may show degenerative changes that are incidental — the history must establish whether current symptoms match the imaging level.
- Medications (anticoagulants, corticosteroids, bisphosphonates) change fracture risk and referral thresholds.
- Review of systems catches systemic disease masquerading as spine pain: morning stiffness >30 minutes (inflammatory arthritis), rash (Lyme, dermatomyositis), fever (infection).
Documentation and Part II Strategy
When a Part II vignette gives you a partial history, read for clusters, not isolated facts. Three converging clues (Valsalva worsening + dermatomal numbness + leg pain below the knee) outweigh any single dramatic-sounding detail. When the vignette asks what to do next, red flags always trump convenience — the correct answer is referral or imaging, not "proceed with cervical distraction testing" when vertebrobasilar symptoms are present.
Build your study around pattern tables: for every regional complaint, know the historical features that separate disc, facet, radicular, referred, and systemic causes. That framework answers more Part II NMS history items than memorizing isolated disease names.
A 38-year-old patient reports low back pain that worsens when coughing, sneezing, or bearing down, and radiates below the knee in an L5 distribution. Which historical feature most strongly supports intervertebral disc pathology with nerve root involvement?
During a cervical case history, a patient reports sudden dizziness, diplopia, and difficulty swallowing after a chiropractic adjustment two days ago. What is the most appropriate next step?
A 55-year-old patient with no trauma history reports 6 weeks of constant thoracic pain, unexplained 15-pound weight loss, and night pain unrelieved by position change. Which diagnosis must be ruled out first?
A patient describes neck pain that is worse when looking up or turning the head, relieved by forward flexion, and localized to the upper cervical region without arm symptoms. Which pain generator is most likely based on history alone?