[Habituation of horizontal eye nystagmus in pigeon during alternation of central and eccentric rotations].
Intact pigeons were rotated in the horizontal plane in the dark in different positions relatively to the rotation axis. At central rotations, the pigeon's head was in the rotation axis whereas at eccentric rotations it was displaced from the axis. Series of central and eccentric rotations were alternated. Each series consisted of 2-5 rotations using angular velocity trapezoids. All stimuli producing habituation were used at most 14 times each. Eccentric rotations did not prevent a gradual decrease of peak velocities of the slow component of primary nystagmus on transition from one series of central rotations to another in 17 pigeons (group 1). The increase of peak velocities was observed in 2 pigeons (group 2). In group 1, a direct dependence among alterations of this parameter of primary nystagmus, modifications of its duration, and variations of peak velocities of secondary nystagmus, were observed. If two identical stimuli did not follow in sequence directly, the effect of the second one produced same nystagmus changes as were observed in present pigeon by comparison of the first and last responses in the series of the central rotations. If they follow one by one, in many cases the second stimulus in the pair produced an increase of peak velocity of primary and secondary nystagmus and rise of delay of the point of primary nustagmus peak velocity. These variations were not random (probability, > 95%).
Stolbkov
Iu K
IuK
I. P. Pavlov Institute of Physiology, Russian Acad. Sci., 199034, St. Petersburg, Nab. Makarova, 6, Russia.
Orlov
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IV
D000818:Animals; D010856:Columbidae / Q000502:physiology*; D006185:Habituation, Psychophysiologic / Q000502:physiology*; D009760:Nystagmus, Physiologic / Q000502:physiology*; D010037:Otolithic Membrane / Q000502:physiology; D012027:Reflex, Vestibulo-Ocular / Q000502:physiology*; D012399:Rotation; D012665:Semicircular Canals / Q000502:physiology
Gabituatsiia gorizontal'nogo nistagma glaz u golubeĭ pri cheredovanii tsentral'nykh i ékstsentrichnykh vrashcheniĭ.