Static cervical-ocular reflex and optokinetic reflex interaction in rabbits

Denia, Antonio; Lau, Clifford G. Y.; Kim, Young S.; Honrubia, Vicente

doi:10.1007/bf00610273

Cited by 126 publications

(6 citation statements)

References 6 publications

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“…In contrast to the lack of interactions between the velocity of slow phases of the HCOR, HVOR and HOKR there appears to be a large static influence of neck torsion on the range of eye positions achieved by the CSPs evoked by optokinetic stimulation (Denia, Lau, Kim & Honrubia, 1979). If the body is positioned in the clockwise direction, the eyes reach a more extreme position before they are returned towards the mid-line by AFPs.…”

Section: Neck-proprioceptive Control Of Eye Movementsmentioning

confidence: 88%

“…This observation was made directly in 'conditioning-test' experiments where it could be shown that 'conditioning' neck-proprioceptive stimulation systematically altered the amplitude of eye movements evoked by 'test' vestibular stimulation. This interaction has obvious implications not only for eye movements evoked by transient head movements, but for eye movements which are evoked by continuous head movement over a range of frequencies or by static head deviations (Denia et al 1979). The range of frequencies over which this interaction between fast-phase eye movements occurs is clearly larger than the range of frequencies over which the compensatory eye movements of the HCOR can be evoked.…”

Section: Discussionmentioning

confidence: 99%

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Interactions of cervico‐ocular and vestibulo‐ocular fast‐phase signals in the control of eye position in rabbits.

Barmack

Errico

Ferraresi

et al. 1989

The Journal of Physiology

115

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SUMMARY1. Eye movements in unanaesthetized rabbits were studied during horizontal neck-proprioceptive stimulation (movement of the body with respect to the fixed head), when this stimulation was given alone and when it was given simultaneously with vestibular stimulation (rotation of the head-body). The effect of neckproprioceptive stimulation on modifying the anticompensatory fast-phase eye movements (AFPs) evoked by vestibular stimulation was studied with a 'conditioningtest ' protocol; the 'conditioning' stimulus was a neck-proprioceptive signal evoked by a step-like change in body position with respect to the head and the 'test' stimulus was a vestibular signal evoked by a step rotation of the head-body.2. The influence of eye position and direction of slow eye movements on the occurrence of compensatory fast-phase eye movements (CFPs) evoked by neckproprioceptive stimulation was also examined.3. The anticompensatory fast phase (AFP) evoked by vestibular stimulation was attenuated by a preceding neck-proprioceptive stimulus which when delivered alone evoked compensatory slow-phase eye movements (CSP) in the same direction as the CSP evoked by vestibular stimulation. Conversely, the vestibularly evoked AFP was potentiated by a neck-proprioceptive stimulus which evoked CSPs opposite to that of vestibularly evoked CSPs.4. Eccentric initial eye positions increased the probability of occurrence of midline-directed compensatory fast-phase eye movements (CFPs) evoked by appropriate neck-proprioceptive stimulation.

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Section: Neck-proprioceptive Control Of Eye Movementsmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Interactions of cervico‐ocular and vestibulo‐ocular fast‐phase signals in the control of eye position in rabbits.

Barmack

Errico

Ferraresi

et al. 1989

The Journal of Physiology

115

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“…The flight-related activity could allow neck-position signals to interact with optokinetic signals. Interestingly, Denia et al (1979) have shown that in rabbits the range of eye position during the OKN is largely influenced by the neck position, whereas the gain of the OKN is not modified. Barmack et al (1989) interpreted this by the presence of a proprioceptive head-position signal that might not be detectable by analyzing the COR, but which can affect eye move-ments driven by other sensory inputs.…”

Section: Possible Mechanisms Underlying the Interaction Between Extermentioning

confidence: 99%

“…Interestingly, Denia et al (1979) have shown that in rabbits the range of eye position during the OKN is largely influenced by the neck position, whereas the gain of the OKN is not modified. The flight-related activity could allow neck-position signals to interact with optokinetic signals.…”

Section: Possible Mechanisms Underlying the Interaction Between Extermentioning

confidence: 99%

Role of the cervico-ocular reflex in the “flying” pigeon: Interactions with the optokinetic reflex

Maurice

Gioanni

2004

Vis Neurosci

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We studied the cervico-ocular reflex (COR) alone and in combination with the optokinetic (OKN) reflex in head-fixed pigeons. We analyzed these responses in two behavioral conditions: (1) animals were hung in a harness ("resting" condition); and (2) animals were additionally submitted to a frontal airflow that provoked a flight posture ("flying" condition). In both conditions, cervical stimulation provoked a slow phase of very low gain (around 0.05) in the opposite direction to that of the stimulation and fast phases triggered near the head-body alignment in the same direction as the stimulation. The slow phase showed a phase lag of 20 deg at 0.5 Hz. The gain of the slow phase was not modified by the velocity, amplitude, or frequency of the stimuli. This gain was not changed by the presence of a fixed visual surround. When cervical stimuli (0.05-0.5 Hz) were added to an optokinetic stimulation (30 deg/s) in the "resting" condition, the slow phase velocity (SPV) of the optokinetic reflex was modulated with a time course close to that produced by the cervico-ocular reflex alone. The SPV was alternately increased and decreased round the SPV level corresponding to the steady-state OKN. In the "flying" condition, optokinetic-cervical stimulation provoked an eye beating field and a strong SPV modulation synchronized with the position of the cervical stimulation. The number of nystagmic beats (OKN) and the amplitude and velocity of the fast phases were modulated in correlation with the SPV. Consequently, the optokinetic response was increased or decreased according to whether the cervical stimuli were in the reverse direction or in the same direction as the optokinetic stimulation, respectively. These data are interpreted as an improvement of gaze stabilization by the COR. This mechanism is context dependent, since it is strongly reinforced during the flight.

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“…Very specific changes in the fast‐component characteristics have been observed in a variety of patients 1 under different testing conditions 2 . Experimental results in animals demonstrate that the characteristic of the fast component can be modulated by extralabyrinthine influences (i.e., neck reflexes or by the influence of drugs in the CNS 28‐30 . Unfortunately, there is not yet an acceptable test for the clinical evaluation of the fast‐component performance despite the significant contribution of the fast‐component system to the vestibular reflexes.…”

Section: Technologic Developmentsmentioning

confidence: 99%

Contemporary vestibular function testing: Accomplishments and future perspectives

Honrubia

1995

Otolaryngol.--head neck surg.

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The development of a standard test battery for the evaluation of vestibular function required a variety of preliminary investigations about the technical and physiologic foundations of the tests. The most important technologic development was the creation of computerized methods, including hardware and software capabilities. The designs of tests were based on physiologic and diagnostic considerations, as demonstrated in experiments on normal subjects and patients. Although time tested and sound, the available test battery satisfies only a limited number of requirements for comprehensive evaluation of vestibular function. This article describes the list of accomplishments, the state of the present limitations, and the needs for the future.

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Static cervical-ocular reflex and optokinetic reflex interaction in rabbits

Cited by 126 publications

References 6 publications

Interactions of cervico‐ocular and vestibulo‐ocular fast‐phase signals in the control of eye position in rabbits.

Interactions of cervico‐ocular and vestibulo‐ocular fast‐phase signals in the control of eye position in rabbits.

Role of the cervico-ocular reflex in the “flying” pigeon: Interactions with the optokinetic reflex

Contemporary vestibular function testing: Accomplishments and future perspectives

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