Vertigo physical examination is the systematic process clinicians use to differentiate peripheral vestibular disorders from central nervous system causes. This evaluation relies on targeted history taking, bedside vestibular tests, and meticulous assessment of eye movements to localize the lesion. The primary goal is to identify red flags that suggest stroke or other serious pathology while confirming benign paroxysmal positional vertigo as a common diagnosis.
Initial Clinical Assessment and Patient History
The vertigo physical examination begins long before the patient lies on the table, rooted in a detailed history that clarifies the symptom profile. Understanding whether the sensation is true rotational vertigo, lightheadedness, or unsteadiness helps narrow the differential diagnosis significantly. Clinicians must inquire about the duration of episodes, triggers such as head movement or position changes, and associated auditory symptoms like hearing loss or tinnitus. This initial conversation provides the context necessary to interpret the findings of the subsequent physical tests accurately.
Spontaneous Nystagmus Evaluation
Observing the eyes for spontaneous nystagmus is a cornerstone of the vertigo physical examination, conducted with the patient sitting upright and watching the examiner's nose. Horizontal nystagmus that beats toward the side of the lesion is a key indicator of peripheral vestibular hypofunction, such as in vestibular neuritis. Vertical or torsional nystagmus, however, often signals a central origin and demands urgent neurologic consideration. The direction of gaze and whether the nystagmus persists in darkness are critical details recorded during this phase of the exam.
Positioning and Maneuver Testing
Positioning tests, most notably the Dix-Hallpike maneuver, are essential for diagnosing benign paroxysmal positional vertigo by provoking characteristic torsional-rotatory nystagmus. During this maneuver, the clinician rapidly places the patient into a supine position with the head turned and extended off the table, observing for immediate nystagmus and vertigo. A positive result is defined by a latent period, fatigable response, and specific eye movement pattern that localizes the affected semicircular canal. The supine roll test is subsequently performed to assess the posterior canal or to differentiate between bilateral involvement.
Dynamic Vestibular Assessment
Beyond positional triggers, the head impulse test provides valuable insight into the function of the horizontal semicircular canals and the vestibulo-ocular reflex. In this dynamic maneuver, the clinician rapidly turns the patient's head horizontally while the patient fixates on a distant target, observing for corrective saccades that indicate peripheral hypofunction. The head shaking test, involving rhythmic horizontal shaking of the head, further challenges the vestibular system and can unmask bilateral vestibular loss or central adaptation issues. These dynamic tests add a functional dimension to the static observations made during the initial observation.
Comprehensive Neurologic and Otologic Screening
A thorough vertigo physical examination integrates targeted neurologic screening to exclude cerebellar or brainstem involvement beyond the vestibular system. Coordination is assessed through finger-to-nose and heel-to-shin tests, while gait is evaluated using tandem walking to detect imbalance. Hearing assessment, either with a finger rub or a tuning fork test, helps identify cochlear involvement that might point to Meniere's disease or other specific pathologies. This holistic approach ensures that subtle neurological signs are not overlooked in the pursuit of a vestibular cause.
Interpreting the Findings and Next Steps
The synthesis of findings from the vertigo physical examination guides the clinician toward a precise diagnosis and appropriate management. A normal examination with provoked positional nystagmus points strongly toward BPPV, allowing for immediate canalith repositioning maneuvers. Conversely, the presence of central nystagmus, skew deviation, or severe ataxia necessitates urgent neuroimaging to rule out posterior circulation stroke. Clear documentation of each test performed and the specific nystagmus characteristics observed is vital for continuity of care and specialist referral when indicated.
