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Augmented ocular vestibular evoked myogenic potentials to air-conducted sound in large vestibular aqueduct syndrome. 2012

Rachael L Taylor, and Andrew P Bradshaw, and John S Magnussen, and William P R Gibson, and G Michael Halmagyi, and Miriam S Welgampola
Institute of Clinical Neurosciences, Royal Prince Alfred Hospital, Central Clinical School, University of Sydney, NSW, Australia.

OBJECTIVE To demonstrate the value of recording air-conducted ocular Vestibular Evoked Myogenic Potentials (oVEMP) in a patient with bilaterally enlarged vestibular aqueducts. METHODS Cervical VEMP and oVEMP were recorded from a patient presenting with bilateral hearing loss and imbalance, attributable to large vestibular aqueduct syndrome. The stimuli were air-conducted tone bursts at octave frequencies from 250 to 2000 Hz. Amplitudes and thresholds were measured and compared with the normal response range of 32 healthy control subjects. RESULTS oVEMP reflexes demonstrated pathologically increased amplitudes and reduced thresholds for low-frequency tone bursts. Cervical VEMP amplitudes and thresholds were within normal limits for both ears across all frequencies of stimulation. CONCLUSIONS This study is the first to describe the augmentation of AC oVEMPs in an adult with large vestibular aqueduct syndrome.

UI MeSH Term Description Entries
D010037 Otolithic Membrane A gelatinous membrane overlying the acoustic maculae of SACCULE AND UTRICLE. It contains minute crystalline particles (otoliths) of CALCIUM CARBONATE and protein on its outer surface. In response to head movement, the otoliths shift causing distortion of the vestibular hair cells which transduce nerve signals to the BRAIN for interpretation of equilibrium. Otoconia,Otoliths,Statoconia,Membrane, Otolithic,Membranes, Otolithic,Otoconias,Otolith,Otolithic Membranes,Statoconias
D012021 Reflex, Abnormal An abnormal response to a stimulus applied to the sensory components of the nervous system. This may take the form of increased, decreased, or absent reflexes. Hyperreflexia,Hyporeflexia,Abnormal Deep Tendon Reflex,Abnormal Reflex,Abnormal Reflexes,Bulbocavernosus Reflex, Decreased,Bulbocavernousus Reflex Absent,Hoffman's Reflex,Palmo-Mental Reflex,Reflex, Absent,Reflex, Acoustic, Abnormal,Reflex, Anal, Absent,Reflex, Anal, Decreased,Reflex, Ankle, Abnormal,Reflex, Ankle, Absent,Reflex, Ankle, Decreased,Reflex, Biceps, Abnormal,Reflex, Biceps, Absent,Reflex, Biceps, Decreased,Reflex, Corneal, Absent,Reflex, Corneal, Decreased,Reflex, Decreased,Reflex, Deep Tendon, Abnormal,Reflex, Deep Tendon, Absent,Reflex, Gag, Absent,Reflex, Gag, Decreased,Reflex, Knee, Abnormal,Reflex, Knee, Decreased,Reflex, Moro, Asymmetric,Reflex, Pendular,Reflex, Triceps, Abnormal,Reflex, Triceps, Absent,Reflex, Triceps, Decreased,Reflexes, Abnormal,Absent Reflex,Decreased Bulbocavernosus Reflex,Decreased Reflex,Palmo Mental Reflex,Pendular Reflex,Reflex Absent, Bulbocavernousus,Reflex, Decreased Bulbocavernosus,Reflex, Hoffman's,Reflex, Palmo-Mental
D004856 Postural Balance A POSTURE in which an ideal body mass distribution is achieved. Postural balance provides the body carriage stability and conditions for normal functions in stationary position or in movement, such as sitting, standing, or walking. Postural Control,Posture Balance,Posture Control,Posture Equilibrium,Balance, Postural,Musculoskeletal Equilibrium,Postural Equilibrium,Balance, Posture,Control, Postural,Control, Posture,Equilibrium, Musculoskeletal,Equilibrium, Postural,Equilibrium, Posture,Postural Controls,Posture Balances,Posture Controls,Posture Equilibriums
D005260 Female Females
D006319 Hearing Loss, Sensorineural Hearing loss resulting from damage to the COCHLEA and the sensorineural elements which lie internally beyond the oval and round windows. These elements include the AUDITORY NERVE and its connections in the BRAINSTEM. Deafness Neurosensory,Deafness, Neurosensory,Deafness, Sensoryneural,Neurosensory Deafness,Sensorineural Hearing Loss,Sensoryneural Deafness,Cochlear Hearing Loss,Hearing Loss, Cochlear,Deafnesses, Neurosensory,Deafnesses, Sensoryneural,Neurosensory Deafnesses,Sensoryneural Deafness,Sensoryneural Deafnesses
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000161 Acoustic Stimulation Use of sound to elicit a response in the nervous system. Auditory Stimulation,Stimulation, Acoustic,Stimulation, Auditory
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults
D013018 Sound Spectrography The graphic registration of the frequency and intensity of sounds, such as speech, infant crying, and animal vocalizations. Sonography, Speech,Sonography, Sound,Speech Sonography,Sonographies, Sound,Sound Sonographies,Sound Sonography,Spectrography, Sound
D013577 Syndrome A characteristic symptom complex. Symptom Cluster,Cluster, Symptom,Clusters, Symptom,Symptom Clusters,Syndromes

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