Cervico-ocular eye movements in relation to different neck torsion velocities.
Rotation of the trunk with a fixed head causes isolated stimulation of cervical afferent input. Eleven patients with marked cervico-ocular reactions (COR) were selected. A neck torsion test (NTT) was performed with the help of a special apparatus. The resulting cervically induced eye movements consisted of two components. In addition to a cervical nystagmus, with its slow, compensatory phase, a deviation of the mean eye position (shift) in an anticompensatory direction, opposite to trunk rotation was observed. The COR in relation to different neck torsion velocities distinctly showed a tuning curve with maximum reactions between 4 degrees/s and 9 degrees/s. Above these values, a strong decrease in COR resulted. The optimal working range vastly differs from that of the vestibulo-ocular reflex (VOR).
Holtmann
S
S
Department of Otorhinolaryngology, University of Munich, FRG.
Reiman
V
V
Scherer
H
H
D000328:Adult; D000368:Aged; D004585:Electrooculography; D005133:Eye Movements / Q000502:physiology*; D005260:Female; D006257:Head; D006801:Humans; D008297:Male; D008875:Middle Aged; D009760:Nystagmus, Physiologic; D011187:Posture; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012399:Rotation