Arousal and Vestibular Habituation

Collins, William E.

doi:10.1007/978-3-642-65920-1_8

Cited by 19 publications

(7 citation statements)

References 37 publications

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“…When compensation is successfully achieved, functional deficits are eliminated and the individual has appropriate equilibrium during daily activities. While this process is highly reliable, it is a dynamic process that tends to be somewhat fragile and can be influenced by multiple factors, including medications, 27,28 level of arousal, 29 and input from the environment 30,31 …”

Section: Discussionmentioning

confidence: 99%

Evaluation of Clinical Measures of Equilibrium

et al. 1998

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Section: Discussionmentioning

confidence: 99%

Evaluation of Clinical Measures of Equilibrium

et al. 1998

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“…As in man (16) and monkey (54), one effect of increased arousal in the pigeon was to increase the gain of the HVOR and VVOR.…”

Section: Arousal Eficts On the Vormentioning

confidence: 94%

“…The linearity of the pigeon HVOR and VVOR was assessed over the frequency range of interest (0.03-6.0 Hz). Also, since the VOR can be modified by arousal level (16), the HVOR and VVOR were studied in both pharmacologically aroused and in pharmacologically untreated (i.e., normal) pigeons.…”

Section: Introductionmentioning

confidence: 99%

A frequency and time domain study of the horizontal and vertical vestibuloocular reflex in the pigeon

Anastasio

Correia

1988

Journal of Neurophysiology

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1. The horizontal and vertical vestibuloocular reflex (HVOR and VVOR, respectively) was studied in four chronically instrumented pigeons. Eye movements were measured using the magnetic search-coil technique and were produced by rotation in the dark. During the rotation paradigms, the pigeons were either pharmacologically aroused (using amphetamine) or drug free (normal). The pigeon HVOR and VVOR were tested using step and sinusoidal rotational stimulation. The range of frequencies (0.03-6.0 Hz) and the magnitude of the sinusoidal stimuli were chosen to match those used in a previous study of the responses of semicircular canal primary afferents (SCPAs) in unanesthetized (i.e., normal) pigeons. 2. The gain of the HVOR and VVOR in both normal and aroused pigeons was independent of stimulus magnitude (6-30 degrees/s) over the frequency range tested. In aroused pigeons, the frequency independent gain (G) of the HVOR (G = 0.6) and VVOR (G = 0.9) was roughly twice that for normal pigeons. Pigeon VOR phase under all combinations of orientation and arousal level was independent of stimulus magnitude except at the lowest frequency tested (0.03 Hz). At this frequency, phase lead decreased as stimulus magnitude increased for the HVOR and VVOR in both normal and aroused pigeons. 3. The step and sinusoidal gains were greater for the VVOR than for the HVOR under the same level of arousal. Neither the gain nor the dominant time constant of the VOR (tau vor) differed for rotation direction (clockwise or counterclockwise) for the HVOR or VVOR in normal or aroused pigeons. 4. The mean value of tau vor was 4.0 +/- 0.5 (SE) s as estimated from frequency response data and 4.3 +/- 0.4 s as estimated from step response data for the HVOR and VVOR in both normal and aroused pigeons. In comparison, the mean value of the dominant or cupular time constant (tau c) of normal pigeon SCPAs was approximately 10 s as estimated from frequency response data. These results indicate that tau vor is shorter than tau c in the pigeon. 5. At higher frequencies, the pigeon HVOR and VVOR exhibit an increasing phase lag unaccompanied by a gain change--characteristics produced by a pure time delay. The value of this time delay was about 7 ms for both the HVOR and VVOR in both normal and aroused pigeons. The HVOR and VVOR in normal and aroused pigeons lacked the higher frequency lead characteristics present in the frequency responses of most pigeon SCPAs.

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“…The tendency for unfamiliar vestibular stimulations, when repeated, to lose their symptom-eliciting ability is an important aspect of vestibular function. Altered states of arousal (such as those experienced during anxiety) may change vestibular reactions [14]. It involves the formation of a highly specific template, or "counterpattern" [12] of the new movements.…”

Section: Vestibular Sensationsmentioning

confidence: 99%

Vestibular Symptoms, Panic, and Phobia

Jacob¹,

Furman²,

Clark³

et al. 1992

Ann. of Clinical Psychiatry

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The interface between anxiety disorders and vestibular disorders is characterized ficity can lead to the development of avoidance behavior similar to that in agoraphobia and height phobia. Second, vestibular symptoms are associated with changes in autonomic activity. These reactions may be indistinguishable from those experienced in anxiety.Given these two areas of overlap, it is not surprising that anxiety, panic, and phobic avoidance are fre uent complaints in patients with balance %isorders. Conversely, vestibular d sfunction is observed model for the interaction between anxie and vestibular abnormalities is discussex KEY WORDS: Vestibular dysfunction, functional dizziness, panic disorder, height vertigo, agoraphobic svndromes.in some patients wit r l panic disorder. A

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Arousal and Vestibular Habituation

Cited by 19 publications

References 37 publications

Evaluation of Clinical Measures of Equilibrium

Evaluation of Clinical Measures of Equilibrium

A frequency and time domain study of the horizontal and vertical vestibuloocular reflex in the pigeon

Vestibular Symptoms, Panic, and Phobia

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