Studies on Habituation of Vestibular Reflexes:<i>VI. Habituation in darkness of calorically induced nystagmus, laterotorsion and vertigo in man</i>

Forssman, Bradley; Henriksson, N. G.; Dolowitz, David A.

doi:10.3109/00016486309127463

Cited by 18 publications

(8 citation statements)

References 17 publications

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“…over a period of 1 hr. [Lidval, 1962;Forssman, Henriksson and Dolowitz, 1963] and has also been reported in cats [Henriksson, Kohut and Fernandez, 1961]. In the present experiment the initial angular velocity of the slow phase remained constant although there was clear evidence of habituation from other parameters.…”

Section: Methodssupporting

confidence: 43%

The Effect of Repetition on Measurements of Post‐rotational Turning Sensation and Nystagmus in Man

Brand

1968

Exp Physiol

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The effects of repetition on the post-rotational turning sensation and nystagmus obtained after deceleration from constant angular velocities are described. In a first series of tests decelerative stimuli from constant angular velocities of 60, 30, 15 and 7-50/sec. were given to two groups of subjects but in a different order, and the mean responses obtained from both groups showed that habituation might occur in the course of a single test.In a second series with a different group of subjects, the test was repeated on each of nine consecutive days. The effects of habituation were again seen and there was a progressive decline in the responses which were obtained. The administration of l-hyoscine (0 7 mg. base) 1 hr. before the test on the sixth day produced little additional effect in habituated subjects.POST-ROTATIONAL turning sensation and nystagmus may be readily elicited in the normal individual by sudden deceleration from a constant angular velocity using a turning chair or similar device. This test of labyrinthine function was first described by van Egmond, Groen and Jongkees [1948] and called by them 'Cupulometry' because the measurable responses produced by such impulsive decelerations are caused by the deflection of the cupulae of the horizontal semi-circular canals by the momentum of the endolymph. It was intended for clinical use as a substitute for the Barany test because it allowed the stimulus response relationship of the end organ to be determined with 'physiological' stimuli, which were said to lie between 3 and 600/sec.The duration of the post-rotational turning sensation elicited by the chosen decelerative stimuli was reported by the subject, and the duration of the nystagmic response was estimated directly by an observer in the turning room. According to Hulk and Jongkees [1948] plots of the duration of turning and of the duration of nystagmus against logarithm of turntable speed were linear for impulses of between 3 and 60°/sec.However, in constructing plots of the mean sensation and nystagmus 'cupulogram', Hulk and Jongkees did not give the individual points from which the graphs were derived, nor did they give estimates of scatter. They expressed their results as 'slope values' (1I/l) using a formula developed by Groen and quoted a mean of 7 sec. (range 5-16) for turning sensation and of 11 (range 6-24) for nystagmus. Further, they took the intercept on the abscissa as indicating the threshold of the individual both for subjective turning sensation and for nystagmus, giving a mean of 2-50/sec. for turning sensation (range 0-75-5), and of 8 for nystagmus (range 5-30). The values * This work was carried out with the aid of a grant from the Clinical Studies

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Section: Methodssupporting

confidence: 43%

The Effect of Repetition on Measurements of Post‐rotational Turning Sensation and Nystagmus in Man

Brand

1968

Exp Physiol

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“…Dysrhythmia must be distinguished from the following phenomena that may modify the intensity and clarity of the VOR: Habituation is the progressive decline in the VOR induced by repeated stimulation. 4,21–24 Habituation can be induced in the absence of the cerebral cortex and neocortex, and even in the presence of lesions in the midbrain. 23 Whether dysrhythmia requires the participation of higher levels of the brain is not known. Per‐stimulatory adaptation is the progressive reduction of the nystagmus response that occurs while stimulation is still acting.…”

Section: Introductionmentioning

confidence: 99%

Dysrhythmia of Caloric Nystagmus

Proctor

Lam

2002

The Laryngoscope

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Dysrhythmia frequently interferes with valid and accurate interpretation of the caloric test. Current methods of "mental alerting" frequently fail to eliminate dysrhythmia. The presence of dysrhythmia appears to be a strong predictor of an abnormal caloric test result, and there is a moderate correlation between dysrhythmia and response intensity. Nevertheless, our results suggest that dysrhythmia is specific to individuals, rather than simply a manifestation of peripheral vestibular disease or a correlate of alertness or response intensity.

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“…The term of habituation, introduced by Abels (1906), is generally used to indicate the phenomenon of a progressive response decline to repeated stimuli, having identical parameters (Monnier et al, 1970). Habituation of the vestibular 'system by various sorts of stimuli (rotatory, caloric) has been reported by many authors (Hood & Pfaltz, 1954;Henriksson et al, 1961;Fluur & Mendel, 1969;Guedry, 1964;Forssman, 1964;Forssman et al, 1963;Brown & Crampton, 1965;Collins, 1965Collins, , 1966Aschan, 1967;Pfaltz & Piffko, 1970Monnier et al, 1970;Montandon et al, 1970;Greiner et al, 1970;Pialoux et al, 1970;Kaphan, 1970). However, reports on the habituation of optokinetic nystagmus are scarce and contradictory.…”

mentioning

confidence: 96%

Effect Of Repetitive Optokinetic Stimulation Upon Optokinetic And Vestibular Responses

Miyoshi

Pfaltz

Piffko

1973

Acta Oto-Laryngologica

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The question of whether habituation of optokinetic nystagmus occurs with repetitive stimulation was studied in a series of trials in 15 human subjects. The results indicate that there is no response decline characteristic of habituation, but on the contrary a constant and definite increase of optokinetic response, interpreted as the result of a positive learning process. The latter does not influence or modify the caloric, rotatory and galvanic vestibular responses. Acta Otolaryng 75Acta Otolaryngol Downloaded from informahealthcare.com by Nyu Medical Center on 07/27/15 For personal use only. Acta Otolaryrig 75 Acta Otolaryngol Downloaded from informahealthcare.com by Nyu Medical Center on 07/27/15 For personal use only. Acta Otolaryngol Downloaded from informahealthcare.com by Nyu Medical Center on 07/27/15 For personal use only.

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Studies on Habituation of Vestibular Reflexes:VI. Habituation in darkness of calorically induced nystagmus, laterotorsion and vertigo in man

Cited by 18 publications

References 17 publications

The Effect of Repetition on Measurements of Post‐rotational Turning Sensation and Nystagmus in Man

The Effect of Repetition on Measurements of Post‐rotational Turning Sensation and Nystagmus in Man

Dysrhythmia of Caloric Nystagmus

Effect Of Repetitive Optokinetic Stimulation Upon Optokinetic And Vestibular Responses

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