What Causes Vertigo Underlying Medical Mechanisms And Triggers

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Vertigo, characterized by a false sensation of movement or spinning, disrupts balance and daily function by originating from complex interactions between the vestibular system, neurological pathways, and structural anomalies. While often dismissed as mere dizziness, its underlying mechanisms span peripheral disorders like Benign Paroxysmal Positional Vertigo (BPPV) to central pathologies such as strokes or multiple sclerosis (MS), each demanding precise diagnosis to tailor interventions. The vestibular system—comprising the inner ear’s labyrinth, vestibulocochlear nerve, and cerebellum—serves as the body’s spatial orientation hub, and dysfunction in any component triggers vertigo through distinct pathophysiological cascades, from otolith dislodgment to neural misfiring.

This exploration delineates the anatomical and functional distinctions between peripheral and central vertigo, supported by structured comparisons of their causes, symptoms, and diagnostic markers. Inner ear disorders, including Meniere’s disease and vestibular neuritis, often stem from inflammatory or autoimmune processes, while central triggers like cerebellar lesions or migraines involve neurochemical imbalances and demyelination. Recognizing these pathways is critical, as misdiagnosis can delay treatment—whether through repositioning maneuvers for BPPV or advanced imaging for suspected strokes. By examining both structural and neurological etiologies, this analysis provides a comprehensive framework for understanding vertigo’s multifaceted origins.

what causes a vertigo

Medical Definitions and Classification of Vertigo

Vertigo represents a distinct clinical entity characterized by the false perception of motion, typically described as a spinning sensation (rotatory vertigo) or linear displacement (e.g., tilting, swaying). Unlike general dizziness—an umbrella term encompassing lightheadedness, presyncope, or disequilibrium—vertigo is specifically tied to vestibular dysfunction, where the brain misinterprets signals from the inner ear, visual system, or central nervous system (CNS). Imbalance, another related symptom, often reflects multisensory integration failures (e.g., proprioceptive or visual deficits) without the illusory motion component. Medical literature defines vertigo as a hallucination of movement (either self or environment), distinguishing it from non-vestibular causes like orthostatic hypotension or anxiety-induced dizziness.

The classification of vertigo is critical for targeted diagnostics and treatment. Vertigo is broadly categorized into peripheral, central, and psychogenic origins, each with distinct pathophysiology, symptom profiles, and prognostic implications. Below, a structured comparison outlines these subtypes, followed by an anatomical breakdown of the vestibular system and its role in vertigo pathogenesis.

Classification of Vertigo: Peripheral, Central, and Psychogenic Origins

Vertigo subtypes differ in their underlying mechanisms, clinical presentations, and diagnostic approaches. Peripheral vertigo arises from dysfunction in the inner ear or vestibular nerve, accounting for ~80% of cases. Central vertigo originates from brainstem, cerebellum, or cortical lesions, often with neurological red flags. Psychogenic vertigo, though less common, involves psychiatric comorbidities (e.g., anxiety, depression) and may coexist with organic causes.

The following table summarizes key features of each subtype, including primary causes, hallmark symptoms, and diagnostic markers. Bolded terms indicate critical differentiating factors.

Type Primary Causes Symptoms Diagnostic Markers
Peripheral Vertigo
  • Benign Paroxysmal Positional Vertigo (BPPV): Dislodged otoconia in semicircular canals.
  • Meniere’s Disease: Endolymphatic hydrops (inner ear fluid imbalance).
  • Vestibular Neuritis/Labyrinthitis: Viral inflammation of vestibular nerve/inner ear.
  • Acoustic Neuroma: Vestibulocochlear nerve tumor.
  • Sudden, brief (<1 min) spinning vertigo triggered by head movement (BPPV).
  • Fluctuating hearing loss, tinnitus, aural fullness (Meniere’s).
  • Nausea/vomiting, horizontal nystagmus (fast phase away from affected ear).
  • Progressive unilateral hearing loss (acoustic neuroma).
  • Positive Dix-Hallpike maneuver (BPPV).
  • Low-frequency sensorineural hearing loss (Meniere’s).
  • Absent central signs (e.g., no ataxia, diplopia, dysarthria).
  • MRI for structural lesions (e.g., acoustic neuroma).
Central Vertigo
  • Stroke (posterior circulation): Vertebrobasilar insufficiency.
  • Multiple Sclerosis (MS): Demyelination of vestibular pathways.
  • Cerebellar Degeneration: Alcohol/toxin-induced or hereditary.
  • Migraine-Associated Vertigo: Vestibular migraine without headache.
  • Persistent (>1 min) or positional vertigo with central neurological signs.
  • Vertical/downbeat nystagmus, dysarthria, ataxia (cerebellar).
  • Headache, photophobia, visual aura (vestibular migraine).
  • Progressive imbalance, gait instability (cerebellar degeneration).
  • MRI/CT to exclude infarction/demyelination.
  • Presence of brainstem/cerebellar signs (e.g., limb ataxia, nystagmus suppression with fixation).
  • Vestibular evoked myogenic potentials (VEMPs) may show central adaptation.
Psychogenic Vertigo
  • Anxiety Disorders: Hyperarousal and somatosensory amplification.
  • Depression: Altered sensory processing (e.g., dystymia-induced dizziness).
  • Post-Traumatic Stress Disorder (PTSD): Vestibular symptoms post-trauma.
  • Mal de Débarquement Syndrome: Persistent rocking sensation post-motion.
  • Non-spinning dizziness (e.g., "floating," "heaviness") without true vertigo.
  • Symptoms exacerbated by stress or fatigue.
  • Lack of objective vestibular deficits on testing.
  • Comorbid psychiatric symptoms (e.g., panic attacks, insomnia).
  • Negative vestibular/neurological exams.
  • Psychometric tools (e.g., Hospital Anxiety and Depression Scale).
  • Response to cognitive behavioral therapy (CBT) or SSRIs.
Key Differentiating Factor:
Central vertigo is always accompanied by neurological signs (e.g., limb ataxia, dysarthria, visual field cuts), whereas peripheral vertigo lacks these features. Psychogenic vertigo is diagnosed by exclusion after ruling out structural/organic causes.

Anatomy of the Vestibular System and Its Role in Vertigo Pathogenesis

The vestibular system comprises peripheral (inner ear) and central (brainstem/cerebellum) components that detect head motion and maintain spatial orientation. Dysfunction in any segment—from hair cells in the labyrinth to cortical processing—can trigger vertigo. Below is a structured breakdown of the system’s anatomy and its contribution to vertigo.

1. Peripheral Vestibular Apparatus: The Inner Ear Labyrinth
The labyrinth consists of:

  • Semicircular Canals: Three orthogonal loops (anterior, posterior, horizontal) detecting rotational acceleration via cupula deflection in the ampulla. BPPV occurs when otoconia (calcium carbonate crystals) dislodge into these canals, triggering false endolymph flow.
  • Otolith Organs (Utricle/Saccule): Detect linear acceleration/gravity via otolith membranes. Dysfunction here causes tilt vertigo (e.g., in Meniere’s disease due to endolymphatic hydrops).
  • Vestibulocochlear Nerve (Cranial Nerve VIII): Transmits signals from hair cells to the vestibular nuclei in the brainstem. Vestibular neuritis (viral inflammation) or acoustic neuroma (compression) disrupts this pathway, leading to unilateral hypofunction.

    • 2. Central Vestibular Pathways: Brainstem and Cerebellum

  • Vestibular Nuclei (Lateral, Medial, Superior, Inferior): Integrate peripheral signals and relay them to:
  • Oculomotor nuclei (for vestibulo-ocular reflex—VOR—stabilizing gaze).
  • Spinal cord (for vestibulospinal reflex—postural control).
  • Thalamus/cortex (for conscious perception of motion).
  • Cerebellum (Flocculonodular Lobe): Fine-tunes vestibular responses. Cerebellar lesions (e.g., stroke, degeneration) cause gait ataxia, nystagmus, and truncal instability.
  • Cerebral Cortex (Parietal/Temporal Lobes): Processes vestibular signals for spatial awareness

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    Inner Ear Disorders and Structural Causes of Vertigo

    Vertigo arising from inner ear dysfunction or structural abnormalities accounts for a significant proportion of peripheral vestibular disorders. These conditions disrupt the delicate balance between the vestibular system’s sensory inputs—originating from the semicircular canals, otolith organs (utricle and saccule), and vestibular nerve—and the central nervous system’s compensatory mechanisms. Structural pathologies often involve mechanical obstruction, fluid imbalance, or inflammatory processes, while functional disorders like BPPV stem from displaced otoconial debris. Understanding their pathophysiology, diagnostic markers, and targeted interventions is critical for accurate management, as misdiagnosis may lead to prolonged symptoms or inappropriate treatments.

    Benign Paroxysmal Positional Vertigo (BPPV)

    BPPV is the most common cause of peripheral vertigo, characterized by brief episodes of rotational vertigo triggered by specific head movements (e.g., rolling over in bed, bending forward, or looking upward). The underlying mechanism involves the dislodgment of otoconia (calcium carbonate crystals) from the utricle or saccule into one of the semicircular canals, typically the posterior canal (accounting for ~90% of cases). These free-floating debris alter the canal’s normal fluid dynamics, generating erroneous endolymphatic flow during head repositioning and stimulating the cupula, which is interpreted by the brain as rotational movement.

    Pathophysiology and Risk Factors
    The otolith organs detect linear acceleration and head position, relying on dense otoconial membranes to provide inertial resistance. Trauma, aging-related degeneration of the otolithic membrane, or spontaneous crystal detachment can displace these particles into the posterior semicircular canal, where they adhere to the cupula or float within the lumen. Key risk factors include:

  • Aging (prevalence increases after 60 years due to otoconial membrane fragility).
  • Head trauma (e.g., whiplash, concussions, or barotrauma).
  • Vestibular migraine (recurrent BPPV episodes may suggest comorbid migraine).
  • Prolonged bed rest or spaceflight (microgravity alters otolith distribution).

    • Diagnostic and Therapeutic Interventions
    The Dix-Hallpike maneuver remains the gold standard for diagnosis, eliciting characteristic vertigo and nystagmus (torsional-upbeat) within 5–40 seconds of positioning the head in extension and rotation. Treatment focuses on canalith repositioning maneuvers (CRMs), which exploit gravity to relocate otoconia back to the utricle. The Epley maneuver involves a sequential series of head movements (supine, 30° head extension, 90° rotation to the affected side, and subsequent repositioning) to guide debris through the posterior canal into the utricle. The Semont maneuver (a "liberatory" technique) rapidly transitions the head between lateral positions to dislodge particles without prolonged extension. Success rates exceed 80% after one session, though recurrence is common (10–30% within a year).

    Mechanism of Epley Maneuver:
    1. Patient seated; head rotated 45° toward affected ear.
    2. Supine with 30° head extension (otoconia move into posterior canal).
    3. Head rotated 90° toward unaffected side (otoconia shift toward utricle).
    4. Patient remains supine for 30 seconds before sitting upright.

    Meniere’s Disease: Pathophysiology and Clinical Spectrum

    Meniere’s disease is an idiopathic disorder of the inner ear characterized by endolymphatic hydrops—an abnormal accumulation of endolymphatic fluid within the membranous labyrinth, leading to distension of the cochlear duct and vestibular apparatus. This hydrops disrupts ionic homeostasis, impairing hair cell function and triggering episodic vertigo, sensorineural hearing loss, tinnitus, and aural fullness. The disease follows a progressive course, with attacks lasting 20 minutes to 24 hours and fluctuating symptoms between episodes.

    Endolymphatic Hydrops and Sensorineural Hearing Loss
    The exact etiology remains unclear, but theories implicate:

  • Autoimmune dysfunction (e.g., IgG4-related inflammation targeting vestibular structures).
  • Genetic predispositions (e.g., mutations in COCH or SLC26A4 genes, linked to endolymphatic homeostasis).
  • Viral infections (e.g., herpes simplex or mumps triggering labyrinthitis).
  • Allergic or vascular factors (e.g., sodium retention, middle ear effusion).

    • Hearing loss progresses from low-frequency to pan-cochlear involvement, often asymmetric. Autoimmune inner ear disease (AIED) may mimic Meniere’s, with positive autoantibodies (e.g., anti-heat shock protein 70) and responsiveness to corticosteroids. Diagnostic criteria include:

  • Definite Meniere’s: Two spontaneous episodes of vertigo >20 minutes with audiometrically documented low-tone sensorineural hearing loss.
  • Probable Meniere’s: Vertigo with fluctuating hearing loss or fullness, but no confirmed low-tone loss.

    • Treatment Strategies
    Management ranges from low-sodium diets and diuretics (e.g., hydrochlorothiazide) to intratympanic steroids for inflammatory variants. Severe cases may require endolymphatic sac decompression or vestibular nerve section to ablate vertigo, though hearing preservation is prioritized. Intranasal gentamicin (aminoglycoside vestibulotoxicity) is reserved for refractory cases, as it selectively destroys vestibular hair cells without cochlear damage.

    Comparative Overview of Inner Ear Vestibular Disorders

    The following table summarizes three distinct inner ear pathologies, their etiologies, diagnostic approaches, and evidence-based treatments. Differentiating these conditions is critical, as therapeutic strategies vary significantly.
    Disorder Triggering Events/Associated Factors Diagnostic Tests Treatment Protocols
    Labyrinthitis/Vestibular Neuritis
    • Viral infections (e.g., herpes zoster, influenza, Epstein-Barr virus).
    • Bacterial labyrinthitis (rare; often secondary to otitis media).
    • Post-viral immune-mediated inflammation of the vestibular nerve or labyrinth.
    • Audiometry: Sensorineural hearing loss (labyrinthitis) vs. normal hearing (vestibular neuritis).
    • VNG (Videonystagmography): Unilateral vestibular hypofunction (reduced caloric response).
    • MRI: Excludes CNS pathology (e.g., stroke, multiple sclerosis).
    • Vestibular suppressants (short-term): Meclizine or diazepam for acute vertigo.
    • Steroids (prednisone, 60–80 mg/day tapering over 2 weeks) for immune-mediated cases.
    • Vestibular rehabilitation therapy (VRT): Accelerates central compensation.
    Vestibular Migraine
    • Migraine with aura (50–70% of cases).
    • Family history of migraine or motion sickness.
    • Triggers: Stress, hormonal fluctuations, alcohol, or dietary factors.
    • Clinical criteria (IHS 2018): ≥5 episodes of vestibular symptoms lasting 5–72 hours, with moderate-to-severe headache or migraine features.
    • VNG: Normal or hyperactive vestibular responses (e.g., positional nystagmus).
    • EEG: Rules out epileptic vertigo (e.g., temporal lobe seizures).
    • Prophylactic medications: Beta-blockers (propranolol), calcium channel blockers (verapamil), or CGRP antagonists (e.g., fremanezumab).
    • Acute treatment: Triptans (e.g., sumatriptan) or NSAIDs for concurrent headache.
    • Lifestyle modifications: Stress management, sleep hygiene, and trigger avoidance.
    Perilymphatic Fist

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    Neurological and Central Nervous System Triggers of Vertigo

    The central nervous system (CNS) plays a critical role in vestibular processing, spatial orientation, and motor coordination, with disruptions in these pathways often manifesting as vertigo. Unlike peripheral vertigo—arising from inner ear dysfunction—central vertigo originates from lesions or dysfunction in the brainstem, cerebellum, or vestibular cortex. These conditions frequently present diagnostic challenges due to overlapping symptoms with peripheral causes, necessitating advanced imaging and specialized tests for accurate identification. Below, the role of cerebellar pathology, vestibular migraine, multiple sclerosis, and diagnostic distinctions between central and peripheral vertigo are examined.

    Cerebellar Dysfunction and Vertigo

    The cerebellum integrates vestibular, visual, and proprioceptive inputs to maintain balance, gaze stability, and spatial awareness. Lesions in the flocculonodular lobe (vestibulocerebellum) or cerebellar peduncles disrupt vestibular processing, leading to vertigo, ataxia, and nystagmus. Cerebellar strokes—often due to vertebrobasilar insufficiency—typically present with acute vertigo, nausea, and horizontal or bidirectional nystagmus, which may be gaze-evoked (suppressed when gaze is fixed). Tumors (e.g., vestibular schwannoma, hemangioblastoma) or degenerative diseases like spinocerebellar ataxia (SCA) progressively impair cerebellar output, causing positional vertigo and gait instability. In cerebellar ataxia, vertigo may coexist with dysarthria, intention tremor, and truncal ataxia, distinguishing it from peripheral vestibular disorders where hearing and cranial nerve function remain intact.

    Key cerebellar pathologies and their vertigo profiles:

    • Cerebellar Stroke
    • Mechanism: Occlusion of the posterior inferior cerebellar artery (PICA) or anterior inferior cerebellar artery (AICA) disrupts vestibular nuclei connections.
    • Symptoms: Sudden-onset vertigo, falling toward the lesion side, nausea, and downbeat nystagmus (PICA stroke).
    • Red Flags: Ipsilateral limb ataxia, dysmetria, or horizontal gaze palsy.
    • Cerebellar Tumors
    • Mechanism: Mass effect on the fourth ventricle or vestibular nuclei (e.g., hemangioblastoma compressing the flocculus).
    • Symptoms: Progressive vertigo, positional nystagmus, and head tilt (indicating otolithic dysfunction).
    • Red Flags: Hydrocephalus (elevated ICP), truncal ataxia, or oculomotor palsies.
    • Degenerative Cerebellar Diseases
    • Mechanism: Purkinje cell loss in spinocerebellar ataxias (SCA1, SCA2) disrupts vestibular-cerebellar feedback loops.
    • Symptoms: Chronic vertigo, gait ataxia, and saccadic dysmetria.
    • Red Flags: Family history, dysarthria, or peripheral neuropathy (e.g., SCA3).
    Diagnostic evaluation relies on MRI with contrast (to visualize tumors or infarcts) and video head impulse testing (vHIT), which may reveal catch-up saccades in central lesions. Electronystagmography (ENG) can differentiate cerebellar nystagmus (e.g., downbeat or gaze-evoked) from peripheral patterns (e.g., unidirectional nystagmus).

    Vestibular Migraine: Neurochemical and Clinical Profile

    Vestibular migraine (VM) is the most common central cause of recurrent vertigo, accounting for ~10–30% of cases in tertiary care. It arises from cortical spreading depression (CSD), a neurovascular phenomenon linked to trigeminal nerve activation and dysregulation of serotonin, glutamate, and calcitonin gene-related peptide (CGRP). Unlike peripheral vertigo, VM episodes are brief (minutes to 72 hours), often triggered by stress, alcohol, caffeine, or hormonal fluctuations (e.g., menstruation). Aura-like symptoms (e.g., photophobia, phonophobia, or visual scintillations) may precede or accompany vertigo, distinguishing VM from menière’s disease (which lacks these features).

    Neurochemical mechanisms in VM:

    • Cortical Spreading Depression (CSD)
    • Pathway: Depolarization waves in the occipital or temporal cortex propagate to the vestibular cortex (postcentral gyrus), mimicking vertigo.
    • Evidence: fMRI studies show hyperactivity in the thalamus and insula during attacks.
    • Serotonin Dysregulation
    • Role: 5-HT1B/1D receptor agonists (e.g., triptans) abort attacks by stabilizing cortical excitability.
    • Link: Migraine with aura shares genetic variants in CACNA1A (encoding calcium channels).
    • Inflammation and CGRP
    • Mechanism: Elevated CGRP in the trigeminovascular system sensitizes vestibular nuclei.
    • Target: CGRP antagonists (e.g., fremanezumab) reduce attack frequency in ~50% of patients.
    Non-pharmacological management focuses on trigger avoidance and lifestyle modifications:
    • Dietary Interventions
    • Tyramine restriction: Avoid aged cheeses, cured meats, and red wine (vasoconstrictive triggers).
    • Hydration and electrolytes: Correct hypomagnesemia or hypokalemia, which may exacerbate CSD.
    • Behavioral Strategies
    • Stress reduction: Cognitive behavioral therapy (CBT) or biofeedback to modulate autonomic responses.
    • Sleep hygiene: Circadian disruption (e.g., jet lag) triggers attacks in ~30% of patients.
    • Physical Therapy
    • Vestibular rehabilitation therapy (VRT): Improves compensatory adaptation in the cerebellum.
    • Gaze stabilization exercises: Reduce oscillopsia during attacks.
    Diagnosis relies on the Barany Society criteria (2017), requiring:
  • ≥5 episodes of spontaneous vertigo lasting 5–72 hours.
  • Current or prior migraine (with or without aura).
  • Exclusion of other causes (e.g., BPPV, menière’s disease).

    • Multiple Sclerosis and Vertigo: Demyelination of Vestibular Pathways

    Multiple sclerosis (MS) presents with vertigo in 5–10% of cases, arising from demyelination of the vestibular nuclei, cerebellar peduncles, or spinal vestibular tracts. Unlike peripheral vertigo, MS-related vertigo is often chronic, positional, or triggered by head movement, with bilateral symptoms and lack of hearing loss. Red flags distinguishing MS from peripheral causes include:
    • Double vision (diplopia) due to internuclear ophthalmoplegia (INO) or optic neuritis.
    • Numbness/weakness in limbs or trunk (indicating spinal cord lesions).
    • Lhermitte’s sign (electric shocks with neck flexion).
    • Internuclear ophthalmoplegia (INO): Adducting eye nystagmus on lateral gaze.
    • Truncal ataxia (suggesting cerebellar involvement).
    Imaging with MRI (T2/FLAIR) reveals hyperintense lesions in the brainstem, cerebellum, or spinal cord, often near the fourth ventricle or medulla.
    Pathophysiology of MS-related vertigo:
    • Vestibular Nuclei Lesions
    • Location: Lateral vestibular nucleus (Deiters’ nucleus) or medial vestibular nucleus.
    • Effect: Disrupts vestibulo-ocular reflex (VOR) and vestibulospinal pathways, causing gait instability and oscillopsia.
    • Cerebellar Peduncle Demyelination
    • Pathway: Inferior cerebellar

      Vertigo emerges as a symptom with roots deeply embedded in the vestibular system’s intricate balance between peripheral sensory input and central processing. From the mechanical dislodgment of otoliths in BPPV to the neuroinflammatory demyelination of MS, each cause reflects a disruption in the body’s ability to interpret spatial orientation accurately. Diagnostic precision—ranging from positional testing for peripheral vertigo to MRI scans for central pathologies—remains essential to differentiating treatable conditions like vestibular migraines from urgent neurological emergencies. Ultimately, vertigo underscores the delicate interplay between anatomy and physiology, where even minor dysfunction can precipitate profound disorientation, highlighting the necessity of a systematic, evidence-based approach to management.

      • FAQ

      What triggers a sudden vertigo attack, and what are the most common causes?

      Vertigo attacks are often caused by inner ear disorders like benign paroxysmal positional vertigo (BPPV), where calcium crystals irritate the ear’s balance system. Other triggers include vestibular neuritis (inner ear nerve inflammation), Ménière’s disease (fluid buildup in the ear), or migraines with vestibular symptoms. Less commonly, they may stem from head injuries, stroke, or multiple sclerosis.

      What medical conditions or factors commonly lead to a vertigo episode?

      Vertigo episodes are frequently caused by BPPV (triggered by head movements), labyrinthitis (ear infection/inflammation), or Ménière’s disease (excess fluid and pressure in the inner ear). Vestibular migraines, anxiety, or even certain medications (like antibiotics or sedatives) can also provoke episodes. Sudden changes in blood pressure or dehydration may contribute in some cases.

      Why does vertigo flare up periodically, and what usually sets it off?

      Vertigo flare-ups often recur due to chronic conditions like Ménière’s disease, where fluid imbalances in the inner ear trigger episodes, sometimes linked to stress, salt intake, or caffeine. BPPV flare-ups may occur after specific head movements (e.g., rolling over in bed). Migraine-related vertigo can flare with sensory triggers (light/sound) or hormonal changes, while anxiety or panic attacks may also exacerbate symptoms.

      What sensations or conditions create the feeling of vertigo, even if it’s not a full attack?

      The vertigo feeling—often described as dizziness or a spinning sensation—can arise from vestibular system dysfunction (e.g., inner ear issues like BPPV or neuritis). It may also stem from central causes like brainstem strokes, tumors, or migraines, or peripheral issues such as low blood pressure, anemia, or medication side effects. Anxiety or inner ear barotrauma (e.g., from scuba diving) can mimic vertigo without a full attack.

      How long do vertigo spells typically last, and what causes them to start suddenly?

      Vertigo spells usually last seconds to minutes (e.g., BPPV) or hours to days (e.g., Ménière’s disease or vestibular neuritis). Sudden onset often ties to head movement (BPPV), infections (labyrinthitis), or vascular issues (stroke or transient ischemic attack). Migraine-associated vertigo may begin gradually with aura-like symptoms, while anxiety-induced spells can start abruptly with stress or hyperventilation.

      What specifically causes vertigo during a migraine, and how is it different from other vertigo types?

      Vestibular migraines cause vertigo due to neurological dysfunction, often linked to genetic or vascular factors triggering brainstem or vestibular nerve sensitivity. Unlike BPPV (position-dependent) or Ménière’s (fluid-related), migraine vertigo may involve visual disturbances, nausea, or throbbing headaches, and can last minutes to days. It’s often triggered by stress, sleep changes, or sensory stimuli, not inner ear issues.

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