FROM MY PT SCHOOL NOTES · NEUROLOGY · UNIT 7 · CHAPTER 24
Which dizziness findings suggest peripheral versus central concerns?
Before testing the vestibular system, understand timing, triggers, associated neurologic features and urgency. A missed central cause matters more than memorizing one classic vertigo description.
Examination and clinical reasoning
Use timing and triggers
Brief episodes triggered by rolling over, bending or looking up may suggest BPPV. Continuous acute dizziness with spontaneous nystagmus, head-motion intolerance or severe gait disturbance suggests an acute vestibular syndrome that requires stroke consideration. Spontaneous episodes may involve vestibular migraine, Ménière disease or transient ischemia.
Ask about exact onset, duration, provoking movement, auditory complaints, migraine symptoms, recent illness, medicines, visual changes and walking ability. Describing symptoms as “spinning” does not rule in a peripheral disorder.
Know what changes urgency
New double vision, slurred speech, focal weakness, swallowing change, severe ataxia, direction-changing gaze-evoked nystagmus or other new neurological findings may indicate a central process. Urgent medical assessment takes priority over a routine balance or positional exam.
The GRACE-3 guideline describes HINTS for appropriately trained clinicians evaluating qualifying acute vestibular syndrome with nystagmus. Untrained use, or applying HINTS to brief positional dizziness, can provide false reassurance.
Select a fitting examination
For carefully selected triggered positional symptoms, a qualified clinician may use Dix-Hallpike or roll testing after screening cervical and other precautions. For other dizziness patterns, choose tests according to history, neurologic signs and professional competence.
The old 2003 ‘peripheral vs central’ chart in your lecture folder is useful as a historical comparison, not a definitive modern diagnostic rule. Eye findings, gait capacity and clinical course must be interpreted together.
Quick distinctions
| Brief triggered positional | Consider appropriate BPPV testing after safety screen |
| Continuous acute vestibular | Consider central causes; trained assessment and referral |
| New neurologic/brainstem signs | Emergency evaluation rather than a routine maneuver |
Clinical reasoning case
A person has acute continuous severe dizziness, cannot maintain upright sitting and has new slurred speech. Someone suggests the Epley maneuver.
Reasoning: A possible central emergency must be evaluated first; this is not uncomplicated brief positional vertigo.
Check your understanding
Why are HINTS and Dix-Hallpike meant for different symptom patterns?
Original uploaded sources: 6 Vestibular Disorders.pdf; 13 Vestibular System.pdf; Assessment Tool for Peripheral vs Central Dysfunction.pdf (2003 chart).
Historical note: Compare the older differential tables with GRACE-3 and current vestibular recommendations.
Educational material, not a patient-specific diagnostic or emergency-care protocol.
