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Friday, July 31, 2020 | History

2 edition of Effects of bilateral caloric habituation on nystagmus responses of the cat found in the catalog.

Effects of bilateral caloric habituation on nystagmus responses of the cat

Mary Jayne Capps

Effects of bilateral caloric habituation on nystagmus responses of the cat

by Mary Jayne Capps

  • 16 Want to read
  • 27 Currently reading

Published by Federal Aviation Agency, Office of Aviation Medicine in Oklahoma City, Oklahoma .
Written in English

    Subjects:
  • Habituation (Neuropsychology)

  • Edition Notes

    Also issued online.

    Statementby Mary Jayne Capps and William E. Collins.
    SeriesAM -- 64-14., AM (United States. Office of Aviation Medicine) -- 64-14.
    ContributionsCollins, William Edward, 1932-, United States. Office of Aviation Medicine., Civil Aeromedical Research Institute (U.S.)
    The Physical Object
    Pagination22 p. :
    Number of Pages22
    ID Numbers
    Open LibraryOL15555689M

    Habituation is a psychological learning process wherein there is a decrease in response to a stimulus after being repeatedly exposed to it. This concept states that an animal or a human may learn to ignore a stimulus because of repeated exposure to it.   CALORIC TEST • Caloric test are highly sensitive for unilateral lesion because each ear is stimulated separately. • Nystagmus produced by this is analyzed and assess the activity of vestibular system • 3 types: 1. Modified Kobrak test 2. Bithermal caloric test 3. Cold air caloric test • .

    Wiljo J.P.J. van Hout, Paul M.G. Emmelkamp, in Encyclopedia of Psychotherapy, II.A. Habituation and Extinction Models. Processes often cited as explanation for the effects of exposure are habituation and extinction.. Habituation refers to a decline in fear responses, particularly the physiological responses, over repeated exposures to fear-provoking stimuli. Nystagmus responses of the cat to rotation and to directionally equivalent and non-equivalent stimuli after unitaleral caloric habituation. Published Date:

    constant of the nystagmus can be made to approach the time constant that Fernandez and Goldberg () have reported for the squirrel monkey’s semicircular canals (about 6 set; Blair and Gavin, ). In the metaphor of Figure 1, this effect, habituation, is equivalent to reducing. Vertical nystagmus may occur in caloric testing when only horizontal is expected. We examined this occurrence in normal subjects and in patients with dizziness. Vertical nystagmus was found in 29 percent of normals and in 12 percent of patients with dizziness, more often with hot than cool caloric stimuli and it is always accompanied by.


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Effects of bilateral caloric habituation on nystagmus responses of the cat by Mary Jayne Capps Download PDF EPUB FB2

Effects of bilateral caloric habituation on nystagmus responses of the cat 1 v. (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Book, Computer File, Internet Resource: All Authors / Contributors.

EFFECTS OF BILATERAL CALORIC HABITUATION ON NYSTAGMUS RESPONSES OF THE CAT MARY JAYNE CAPPS and WILLIAM E. COLLINS It has been suggested that the decline (ha­ bituation) of the nystagmus response to re­ peated vestibular stimulation is a form of learn­ ing in that it possesses the necessary features of.

rep civ aeromed res inst us. sep effects of bilateral caloric habituation on nystagmus responses of the cat. am capps mj, collins : Capps Mj, Collins We. Acta Otolaryngol. Oct;64(4) Unilateral caloric habituation of nystagmus in the cat. Effects on rotational and bilateral caloric by: Collins, W.E.: Nystagmus responses of the cat to rotation and to directionally equivalent and non-equivalent stimuli after unilateral caloric habituation.

Acta oto-laryng. (Stockh.) 58, – (a).Cited by: Mertens RA, Collins WE () Unilateral caloric habituation of nystagmus in the cat.

Effects on rotational and bilateral caloric responses. Acta Otolaryngol – Google Scholar. Miyoshi T, Pfaltz CR, Piffko P () Effect of repetitive optokinetic stimulation upon optokinetic and vestibular responses. Bilateral vestibular loss, that should be more precisely qualified as "horizontal semicircular canal bilateral loss", is a concept usually defined by the following characteristics: no response.

One month after the end of CVT, nystagmus responses were still about % lower than control values. These results indicate that CVT induces a habituation of vestibular responses. Objective: Here, we investigate whether vertigo and nystagmus is generated at the first stage of vestibular processing in the parieto-insular vestibular cortex (PIVC).

Background: It is believed that the PIVC is the first and most important hub for the cortical processing of vestibular information. In this region of the brain, vestibular information from both hemispheres is integrated with. EXPERIMENTAL NEUROLOGY 9, () The Mechanism of Nystagmus Induced by Anesthetics J.

GUTMAN, F. BERGMANN, AND NI. CHAIMOVITZ Department of Pharmacology, The Hebrew University, Hadassah Medical School, Jerusalem, Israel Received Octo Nystagmus induced in rabbits by ether, barbiturate, or intravenous xylocaine depends on head position; it is.

Effects of bilateral caloric habituation of nystagmus responses of the cat. Published Date: (habituation) of the nystagmus response to repeated vestibular stimulation is a form of learning in that it possesses the necessary features of learned behavior - acquisition, retention, and transfer. Nystagmus responses of the cat to rotation.

Capps, M. J., and Collins, W. E: Effects of bilateral caloric habituation on nystagmus responses of the cat. AD Collins, W. E., and Huffman, H. W: Design and performance characteristics of a mechanically driven vestibular stimulator. AD responses of the cat to unilateral stimulation occurred after habituation to bilateral caloric irrigations.

The present study was designed to examine furtJher some questions regarding trans­ fer of hrubituation while attempting to evaluate the influences of intensity, type of stimulus, and unilateral vs. bilateral. Objectives: To clarify the clinical significance of positional down beat nystagmus (pDBN).

Methods: A discussion of the neuro-otological findings in 50 consecutive patients with pDBN. Results: In 38 patients there was evidence of CNS disease (central group) but in 12 there was not (idiopathic group). In the CNS group, presenting symptoms were gait, speech, and autonomic dysfunction whereas in.

We studied performance on tests of visual neglect and left lateral gaze after caloric stimulation in 18 patients with left-sided visual neglect after strokes. Except for one patient with absent vestibulo-ocular responses, all improved during caloric stimulation on the left by cold (LC) or on the right by warm water (RW).

Improvement seemed to depend on the 'facilitation of left lateral gaze. To identify the regions co‐activated or co‐deactivated with fixation suppression and habituation of caloric nystagmus, we used inclusive masking in an entire subject group [n = 12, activated or deactivated with attenuation of caloric nystagmus by repetition (P.

Research over the past 20 years has provided a clearer understanding of the pathogenesis of most forms of nystagmus and other ocular oscillations.

To the clinician, these advances translate into greater accuracy of nystagmus as a diagnostic sign. However, to capitalise on these advances, it is important to systematically examine eye movements and interpret the findings with reference to.

Adaptation to vestibular disorientation. IV, Responses to angular acceleration and to bilateral caloric stimulation following unilateral caloric habituation 12 p. (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Book, Computer File, Internet Resource.

Collins, W. E.: Primary, secondary, and caloric nystagmus of the cat following habituation to rotation. AD Collins, W. E.: Nystagmus responses of the cat to rotation and to directionally equivalent and nonequivalent stimuli after unilateral caloric habituation.

AD In the past, responses were quantified by SPV (in the culmination phase) of the caloric nystagmus, the maximum nystagmus frequency and the total number of nystagmus beats. The maximum SPV at the time of maximum response (culmination phase) occurs generally about 50–60 s after the start of irrigation and is the preferred parameter to be.

traditionally SN is corrected for by adding or subtracting it from the peak response of the response for a "corrected peak response" (CPR) - the RBSN sums with the response generated by a right warm caloric (RBN) and subtracts from a right cool (LBN) - SN biases the caloric responses with nystagmus that beats in the same direction*.

In order to utilize the hyperactive nystagmus response as an abnormal clinical sign, it was essential to establish criteria for this phenomenon. In 67 normal subjects weak and strong caloric stimulations were performed and by measuring nystagmus frequency at the culmination a wide range of responses was obtained.during fixation suppression and habituation of caloric vestibular nystagmus in 12 normal subjects, using PET.

Significant positive correlation between regional cerebral blood flow (rCBF) and slow phase eye velocity of caloric nystagmus was observed in the middle and posterior insula, inferior parietal lobule, temporal pole.