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Eye synergy12/30/2023 ![]() Guedry FE (1974) Psychophysics of vestibular sensation. Gonshor A, Melvill Jones G (1976b) Extreme vestibulo-ocular adaptation induced by prolonged optical reversal of vision. Gonshor A, Melvill Jones G (1976a) Short-term adaptive changes in the human vestibulo-ocular reflex arc. ![]() Gonshor A, Melvill Jones G (1971) Plasticity in the adult human vestibulo-ocular reflex arc. Gauthier GM, Robinson DA (1975) Adaptation of the human vestibulo-ocular reflex to magnifying lenses. Exp Brain Res 84:47–56įurst EJ, Goldberg J, Jenkins HA (1987) Voluntary modification of the rotatory induced vestibulo-ocular reflex by fixating imaginary targets. Can J Physiol Pharmacol 64: A3īloomberg J, Melvill Jones G, Segal B (1986b) Does the quick phase supplement of the goal-directed vestibulo-ocular reflex (VOR) reflect the adaptive state of a modifiable internal spatial map? Soc Neurosci Abstr 12, Part 2, p 1090īloomberg J, Melvill Jones G, Segal B (1991) Adaptive modification of vestibularly perceived rotation. Elsevier Biomed Press, Amsterdamīloomberg J, Melvill Jones G, Segal B (1986a) Quick and slow phase interaction following adaptive attenuation of the human vestibulo-ocular reflex. Progr Brain Res 76:411–420īerthoz A, Melvill Jones G (eds) (1985) Adaptive mechanisms in gaze control. Acta Otolaryngol (Stockh) 81:365–375īerthoz A (1988) The role of gaze in compensation of vestibular disfunction: the gaze substitution hypothesis. Acta Otolaryngol (Stockh) 97:1–6īarr CC, Schultheis LW, Robinson DA (1976) Voluntary, non-visual control of the human vestibulo-ocular reflex. It is suggested that a conscious vestibular percept of self-rotation might underlie the combined saccadic-slow-phase response, and that the net under performance after adaptation might reflect attenuation of this percept relative to the actual rotational stimulus.īaloh RW, Lyerly K, Yee YD, Honrubia V (1984) Voluntary control of the human vestibulo-ocular reflex. In one subject, compensatory saccadic eye movements corrected a consistent directional asymmetry in the slow-phase response. However, there was a consistent “synergistic” tendency for saccadic eye movements to improve slow-phase performance, regardless of the subject's adaptive state. Subjects re-exposed to 30 min of normal visual-vestibular interaction displayed a variety of recovery patterns using different combinations of slow and saccadic eye movements. ![]() Thus after adaptation, the combined saccadic-slow-phase response brought the final gaze position to a point in space that was systematically shifted in the direction of head rotation (i.e. After adaptation, the corresponding values in the same population were 53%, 18% and 71% respectively. Before adaptation, the cumulative slow-phase and cumulative saccadic components produced on average 78% and 14% respectively of the ideal (100%) compensation, thus yielding an overall net compensation which was 92% of the desired value. The adaptive experience comprised 2 h of full-field visual suppression of the VOR during sinusoidal rotation of subject and surround at 1/6 Hz and 40°/s velocity amplitude. In each test series, subjects attempted to stabilize their gaze on a previously seen target during each of 40 brief (≈0.5 s) whole body rotations (40°/s, 20° amp) conducted in complete darkness. ![]() The present study further investigates this phenomenon by measuring the respective contributions of saccadic, slow-phase and overall net compensation in 9 subjects tested before and after 30% adaptive attenuation of VOR slow-phase gain. Nevertheless it has recently been found, that even in the dark, this inadequacy tends to be corrected by supplementary saccades usually acting in the compensatory direction. However, slow-phase compensation per se is generally inadequate in these circumstances. When a normal human subject is briefly turned in total darkness while trying to “look” at a spatially fixed target, the vestibulo-ocular reflex (VOR) produces slow-phase compensatory eye movements tending to hold the eyes on target.
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