[Clinical significance of cervico-ocular reactions].
Cervically induced eye movements consist of a nystagmus and a deviation of the mean eye position (shift). They show in relation to different neck torsion velocities maximum reactions at slow velocities. The clinical significance of these cervico-ocular reactions is discussed controversially. Therefore we investigated 40 healthy subjects without any neurootological findings, who, in addition, underwent a manual examination. The neck torsion test was performed automatically with quantifiable stimulus parameters and a complete head fixation by means of individual dental casts. It could be shown that at a constant chair velocity of 5 degrees/s every healthy subject exhibits cervical nystagmus and/or shift deviations. In comparison a group of 30 patients with an upper cervical spine syndrome also showed similar cervico-ocular reactions without significant difference. It can be concluded that a muscle hypertonus in the deep neck region does not lead to pathological, cervically induced eye movements and that the cervical nystagmus itself is not a pathognomonic sign for cervical, proprioceptive vertigo.
Holtmann
S
S
Klinik und Poliklinik für Hals-Nasen- und Ohrenkranke, Ludwig-Maximilians-Universität München.
Reiman
V
V
Schöps
P
P
D000328:Adult; D000344:Afferent Pathways / Q000502:physiology; D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008575:Meniere Disease / Q000175:diagnosis* / Q000503:physiopathology; D008875:Middle Aged; D009334:Neck Muscles / Q000294:innervation*; D012016:Reference Values; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D014724:Vestibular Function Tests; D014725:Vestibular Nerve / Q000503:physiopathology
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