ABSTRACT
The clinical entity characterized by episodic vertigo and a positive Hennebert's sign in patients without hearing loss is described. The history of perilymph fistulas is reviewed. Minute perilymph fistulas of the oval window were documented surgically in five consecutive patients with this syndrome. All experienced relief of their symptoms after surgical correction.
Subject(s)
Eye Movements , Fistula/complications , Labyrinth Diseases/complications , Labyrinthine Fluids , Perilymph , Vertigo/etiology , Adult , Diagnosis, Differential , Electronystagmography , Female , Fistula/diagnosis , Humans , Labyrinth Diseases/diagnosis , Male , Postural BalanceABSTRACT
The vestibular and optokinetic responses of a group of white cats were evaluated and compared with the responses from a control group of pigmented animals. The results indicate that in all cases the white cats exhibited varying degrees of vestibular and/or optokinetic dysfunction, which in some animals varied from test session to test session.
Subject(s)
Cats/physiology , Eye Movements , Vestibule, Labyrinth/physiology , Animals , Ear, Inner/physiology , Female , Male , Posture , Rotation , Species Specificity , Tympanic Membrane/physiology , Vestibular Function TestsABSTRACT
An infrared video technique is presented for the observation and documentation of patients' eye movements during vestibular stimulations in total darkness. Results from the comparison of the video and electronystagmographic information indicate that the infrared video technique is a useful diagnostic aid for vestibular evaluation and in some instances may be necessary. Further, the data from two-channel electronystagmographic recordings may be misleading even when the patient is tested in total darkness with eyes open.
Subject(s)
Electromyography , Eye Movements , Infrared Rays , Television , Vestibular Function Tests/methods , Darkness , Humans , Lenses , Videotape RecordingABSTRACT
A surgical technique for the microembolization of the inner ear of the cat is described, and photomicrographs of representative central neural areas and end organ structures are presented.
