ABSTRACT
Electronystagmographic examination of 45 patients with peripheral and 22 patients with central lesions of the vestibular system was performed, using graded caloric and rotatory stimulation of labyrinths. It was demonstrated that functional and topical diagnosis of vestibular problems can be made with the aid of righting reflexes and vestibular recruitment. In this situation, it is important not only to detect the righting reflex but also to determine the nystagmic parameters, in which it is manifested, and to identify the pattern of nystagmic asymmetry and the stage of compensation of vestibular dysfunction.
Subject(s)
Electronystagmography , Vestibular Diseases/diagnosis , Vestibular Function Tests , Adult , Caloric Tests , Female , Humans , Male , Meniere Disease/diagnosis , Middle AgedABSTRACT
Spontaneous and reflex nystagmus of 10 patients with peripheral lesions of the vestibular system at one of the stages of vestibular dysfunction compensation development were examined. Spontaneous nystagmus (recovery) toward the sound side and asymmetry of reflex nystagmus in the form of DP toward the affected side were revealed. The period of disease characterized by the development of spontaneous and reflex nystagmus is termed compensation development stage II. This stage develops when central and peripheral compensation of vestibular dysfunction is realized simultaneously. Analysis of compensation development stage II helps to identify the compensation lesion level, side and degree of lesion of peripheral vestibular structures.
Subject(s)
Ear, Inner/blood supply , Infarction/physiopathology , Meniere Disease/physiopathology , Nystagmus, Physiologic , Reflex, Vestibulo-Ocular , Vestibule, Labyrinth/physiopathology , Action Potentials , Electronystagmography , Humans , Male , Middle AgedABSTRACT
A case of opsoclonus, myoclonic hyperkinesis of the eyes, is described. The causes of the occurrence of such a rare phenomenon are analyzed. A hypothesis is advanced, according to which in the mechanism of oculomotor abnormalities, of great importance are anatomic formations in the oral parts of the brain stem.
Subject(s)
Hyperkinesis/diagnosis , Myoclonus/diagnosis , Ocular Motility Disorders/diagnosis , Adult , Diagnosis, Differential , Electronystagmography , Female , Humans , Hyperkinesis/physiopathology , Myoclonus/physiopathology , Nystagmus, Pathologic/diagnosis , Ocular Motility Disorders/physiopathology , Oculomotor Muscles/physiopathologyABSTRACT
Hyperventilation has been employed in the examination of 36 patients with brain stem injuries of various origin in order to identify and record nystagmus. The use of this method has increased the rate of visualization of the abnormality.
