
Specialist care for vertigo, balance, and complex neurology.
Dr. Ian Purcell, MD PhD, leads a dedicated otoneurology practice for patients with vestibular disorders, migraine, and unexplained dizziness — combining clinical neurology with research-grade diagnostics.
Sixteen neurologic & vestibular specialties, each with a patient-ready guide.
Explore conditions we routinely evaluate and treat—from BPPV, Menière's disease, and vestibular migraine to neuropathy and movement disorders—then dive into approachable education tailored to each topic.
Spatial Disorientation in Aviation / Aerospace Environments
How flight and changing gravity can make vision, the inner ear, and body sensation disagree about position and motion.
Explore guideVestibular Disorders
Vestibular disorders encompass a range of conditions affecting the vestibular system, which is crucial for ma…
Explore guideVertigo (BPPV)
Benign Paroxysmal Positional Vertigo (BPPV) is a common cause of vertigo that results from dislodged calcium…
Explore guideMeniere’s Disease
Meniere's Disease is a disorder of the inner ear causing severe dizziness (vertigo), ringing in the ears (tin…
Explore guideViral Neuronitis / Labyrinthitis
These conditions involve inflammation of the inner ear or the nerves that connect the ear to the brain, often…
Explore guideNystagmus
Nystagmus is defined as any rhythmic, involuntary oscillation of the eyes. It can either be physiological or…
Explore guideGait Ataxia
Gait ataxia is a form of ataxia (lack of muscle control) that affects walking and is characterized by uncoord…
Explore guideTinnitus
Tinnitus is characterized by hearing noises in the ears that are not caused by an external source. Types incl…
Explore guideHearing Loss
Hearing loss can result from damage to different parts of the ear, including the outer, middle, and inner ear…
Explore guideOrthostatic Hypotension
Summarizes diagnosis, symptom patterns, and treatment paths for this specialty so you walk into appointments better informed.
Explore guideNeuropathy
Neuropathy, or peripheral neuropathy, involves damage or dysfunction of one or more nerves, resulting in numb…
Explore guideTrigeminal Neuralgia
Trigeminal Neuralgia is a chronic pain condition affecting the trigeminal nerve, which carries sensation from…
Explore guideParkinson's Disease
Parkinson's Disease is a progressive nervous system disorder that affects movement. Symptoms start gradually,…
Explore guideNeuromuscular Disorders
Summarizes diagnosis, symptom patterns, and treatment paths for this specialty so you walk into appointments better informed.
Explore guideSleep Disorders
Sleep disorders are conditions that significantly affect an individual's ability to achieve restful, restorat…
Explore guideCardiac Arrhythmias
Summarizes diagnosis, symptom patterns, and treatment paths for this specialty so you walk into appointments better informed.
Explore guideNystagmus Video Library: Types & Diagnostic Insights
An annotated visual guide to the eye-movement patterns that drive vestibular diagnosis — horizontal, vertical, torsional, and the signature beats of posterior- and lateral-canal BPPV. Curated by Dr. Purcell for clinicians, trainees, and patients alike.
- 14 annotated reference clips with clinical context
- Patterns organized by plane and provocation
- Built-in glossary of VNG & chart abbreviations
Six of 14 patterns — horizontal, vertical & torsional
Research-grade testing in a clinical setting.
Our diagnostic suite combines decades of experience with the same instruments used in vestibular research labs — so the cause of your dizziness can be measured, not guessed.

Computerized Dynamic Posturography (CDP)
Quantifies balance under controlled visual and proprioceptive conditions.
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Electroencephalogram (EEG)
Measures electrical activity in the brain when seizure-like spells or episodic neurologic events are part of the differential.
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Electromyography / Nerve Conduction Velocity (EMG/NCV)
Assesses peripheral nerve and muscle function to clarify weakness, numbness, neuropathy, and neuromuscular disorders.
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Epley Omniax Chair
Precision multi-axis positioning chair used to diagnose and treat complex positional vertigo, including difficult-to-localize BPPV.
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TRV Chair
A controlled rotational vestibular platform that helps evaluate and treat positional vertigo and persistent imbalance syndromes.
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DizzyDoctor Vertigo Recording Goggles
High-resolution infrared video captures eye movements during dizziness and positional testing.
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Videonystagmography (VNG)
Comprehensive battery of eye-movement tests to localize peripheral and central vestibular causes of dizziness.
Read more →The DizzyDoctor® Vertigo Recording Goggles
Invented and patented by Dr. Ian Purcell, MD PhD, the DizzyDoctor® Goggles bring laboratory-grade video-nystagmography to the bedside, the clinic, and across extreme field environments.
Utility & design patents covering eye-tracking optics, calibration logic, and kinematic nystagmus algorithms.
A clinician-scientist focused on the vestibular system.
Dr. Ian Purcell is a clinical neurologist with an additional focus in otoneurology and headache management. He completed the combined MD/PhD program in Neuroscience at the University of Texas Medical Branch, with six years of NASA-funded research in vestibular neurophysiology.
A lifelong aviator and active researcher, Dr. Purcell continues to train and certify with the FAA in fixed-wing aircraft and complex rotorcraft—including turbine jet-engine helicopters such as the Hughes 369HS. From an aerospace medicine perspective, this firsthand cockpit immersion enables him to deeply understand the multi-axis forces and sensory mismatches pilots experience, diagnose vertiginous complaints in aviators, and prescribe focused, flight-specific vestibular rehabilitation protocols that restore spatial orientation and safely return flight crews to the air.
Spatial Disorientation.
When your senses lose the horizon.
Flight and rapid gravitational transitions challenge how the brain integrates visual, vestibular, and proprioceptive inputs. When familiar signals conflict, spatial disorientation can deceive even the most seasoned aviators. Dr. Purcell translates aerospace neurophysiology directly into clinical diagnostics and pilot rehabilitation.
San Diego Magazine Top Doctors
Dr. Ian Purcell and Dr. Monali Patel are voted annually by physician peers into San Diego Magazine’s Top Doctors list for specialized neurology and otoneurology excellence.
The cover archive · 2016–2025 · Select any cover to view in full resolution
San Diego specialty otoneurology, by appointment.
Comprehensive diagnostic evaluations, advanced rotational testing, and patient-centered treatment for acute and chronic vestibular and balance disorders.
- Telephone
- (858) 223-2172
- Medical Fax
- (858) 533-8397
- Clinic Hours
- Monday – Thursday · 8:00 AM – 4:30 PM
- Insurances
- Medicare, PPO & Approved Plans →








