The Damped Torsion Swing Test: Quantitative and Qualitative Aspects of the ENG Pattern in Normal Subjects

Calseyde, P. Van De; Ampe, W; Depondt, M

doi:10.1001/archotol.1974.00780040463008

Cited by 5 publications

(1 citation statement)

References 5 publications

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“…During torsion swing testing the patient is seated in a chair whose rotation is mechanically controlled by the action of a calibrated spring (14). Alternatively, the seat of the swing can be hung from the ceiling by two cables much like a child's playground swing set (10).…”

Section: Torsion Swing Chairmentioning

confidence: 99%

Torsion Swing Chair

Clark¹

1986

Ear and Hearing

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Section: Torsion Swing Chairmentioning

confidence: 99%

Torsion Swing Chair

Clark¹

1986

Ear and Hearing

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The damped pendular rotation test in central vestibular disorders

Kanzaki

Sakagami

1976

Arch Otorhinolaryngol

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Nystagmic rhythm in the damped pendular rotation test (DPRT) was analysed electronystagmographically both in healthy subjects (control) and patients with peripheral and central vestibular lesions. The patients were tested in a semi-dark room with eyes open and, in addition, a serial subtraction task was performed to maintain the state of alertness throughout the rotation. In the controls 49 years of age and under dysrhythmia was found in 11%, while in persons 50 years of age and over the abnormal rate was 29%. In patients with acoustic tumors, who had undergone surgery in which the translabyrinthine and middle fossa approach had been utilized, dysrhthmia was present post-operatively in only a few cases. In patients 49 years of age and under, operated on through the suboccipital approach, dysrhythmia was found post-operatively, or was at least more remarkable than pre-operatively in most cases. Nystagmic rhythm was, on the other hand, regular with cerebellar degenerative process or atrophy. Pre-operative dysrhythmia in patients with cerebellar and cerebral tumors was in some cases post-operatively converted to regular rhythmic nystagmus in pendular stimulations. Therefore, in cerebellar and cerebral tumors, dysrhythmia was thought to be due to secondary effects in brainstem, as these tumors can cause intracranial hypertension and circulatory disturbances in surrounding brain tissues. In Menière's disease and sudden deafness, dysrhythmia and salvos in DPRT were found in the age groups, 49 years of age and under and 50 years and over, as frequently as in the healthy and control group. In one case with Menière's disease which showed dysrhythmia, labyrinthectomy was done. This surgical manipulation of the labyrinth did not eliminate dysrhythmia, though a temporary improvement was obtained. This result indicates that the dysrhythmia may be of central origin. These findings also suggest that nystagmic rhythm in DPRT with mental arithmetic is significant in assessing brainstem dysfunctions, when the age and state of alertness of the patient are taken into consideration, or when comparing the pre- and post-operative findings in intracranial lesions.

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Influence of Age on Results of Vestibular Function Tests: Review of Literature and Presentation of Caloric Test Results

Mulch¹,

Petermann²

1979

Ann Otol Rhinol Laryngol

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Following a bibliographic review of currently known, age-dependent morphological and functional changes of the vestibular and auditory system, results are presented of our investigations concerning the influence of age on the outcome of the caloric test on 102 healthy subjects from six age groups ranging between the ages of 11 and 70 years. They prove, without any doubt, that the absolute values of nystagmic parameters in the caloric test are dependent upon age; but not in such a way that the intensity of reaction decreases with advancing age. On the contrary, they indicate that in awake, healthy subjects of middle and late middle-age, the most intensive reactions occur (maximum slow phase velocity, maximum amplitude, maximum frequency, total number of beats). In addition, based on the statistical analysis, it seems probable that the extent of the side difference of excitability depends upon age. Individuals in their middle years show side differences to a considerably lesser degree than children and elderly subjects. These represent findings which, to our knowledge, are reported here for the first time. Provided our results gain further substantiation, standard values for a true quantitative evaluation of the caloric test could only be determined as in the audiometric functional tests on the basis of larger test series of healthy subjects belonging to different age groups.

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The Damped Torsion Swing Test: Quantitative and Qualitative Aspects of the ENG Pattern in Normal Subjects

Cited by 5 publications

References 5 publications

Torsion Swing Chair

Torsion Swing Chair

The damped pendular rotation test in central vestibular disorders

Influence of Age on Results of Vestibular Function Tests: Review of Literature and Presentation of Caloric Test Results

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