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| 2. |
- Ledin, T., et al.
(författare)
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Dynamic posturography and aging
- 1991
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Ingår i: Vertigo, nausea, tinnitus, and hypoacusia due to head and neck trauma. - Amsterdam : Excerpta Medica. - 0444811508 ; , s. 229-232
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Konferensbidrag (refereegranskat)
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| 3. |
- Ledin, T., et al.
(författare)
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Dynamic posturography in assessment of polyneuropathic disease
- 1991
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Ingår i: Journal of Vestibular Research-Equilibrium & Orientation. - 0957-4271 .- 1878-6464. ; 1:2, s. 123-128
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Tidskriftsartikel (refereegranskat)abstract
- Twenty-eight patients with polyneuropathy aged 49-82 years (mean 67 years) were assessed by dynamic posturography. The patient group was compared to a control group comprising 29 healthy controls aged 70 through 75 years (mean 73 years). The dynamic posturography method comprises a sensory organization part in which the platform and visual surround are either stable or referenced to the patient's sway; furthermore, the eyes are open or closed. In a movement coordination part the platform makes active movements. In the sensory organization part of the dynamic posturography the patient group showed significantly lower equilibrium performance compared to the control group in the test conditions with absent vision, sway-referenced surrounding, and, finally, sway referenced platform and surrounding. In these conditions the influx of somatosensory information is of paramount importance for stable posture. In the movement coordination test, the patient group showed prolonged muscular response latencies in both forward and backward platform perturbations compared to the control group. It is concluded that dynamic posturography is a valuable diagnostic tool in assessment of the dynamic equilibrium performance in patients with polyneuropathy.
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| 4. |
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| 5. |
- Ledin, T., et al.
(författare)
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Effects of balance training in elderly evaluated by clinical tests and dynamic posturography
- 1991
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Ingår i: Journal of Vestibular Research-Equilibrium & Orientation. - 0957-4271 .- 1878-6464. ; 1:2, s. 129-138
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Tidskriftsartikel (refereegranskat)abstract
- All persons aged 70 through 75 years (N = 457) in a Swedish community were invited to participate in a 9 week balance training study. Out of 55 interested subjects, 15 were chosen at random for a study group; 15 matched controls were also selected. Before and after the investigation period the balance function was assessed by clinical balance tests and dynamic posturography. In the clinical balance tests, the training group significantly improved their balance standing on one leg with eyes closed as well as standing on one leg while shaking the head; they also walked 15 m back and forth faster. In the dynamic posturography the training group significantly improved their equilibrium scores in the 3 most difficult test conditions. The results of the control group were unchanged except for one test condition in the dynamic posturography. The differences in one-leg standing with head shaking, walking 2 x 15 m, and the equilibrium score using sway-referenced platform in dynamic posturography were proved to be attributable to the training. The first investigation in all 29 subjects formed normative dynamic posturography data for the age group 70 through 75 years. The normative posturographic data of this age group differed from previously obtained data in the age groups 20 through 59 and 60 through 69 years. It is concluded that elderly may improve their balance by regular balance training exercises for as short a period as 9 weeks. This might prove to be of great value in improving balance and thereby preventing accidental falls and subsequent fractures in elderly.
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| 7. |
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| 8. |
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| 9. |
- Ålund, M., et al.
(författare)
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Dynamic posturography in cervical vertigo
- 1991
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Ingår i: Acta Oto-Laryngologica. - : Informa UK Limited. - 0001-6489 .- 1651-2251. ; 111:s481, s. 601-602
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Tidskriftsartikel (refereegranskat)abstract
- Cervical vertigo, the entity of neck disorder and associated vestibular symptoms, was investigated in 15 suspected subjects and results were compared with 15 age-matched controls. A modified dynamic posturography investigation with different head positions was used. Head position was recorded 3-dimensionally with electrogoniometry. Differences on a sway-referenced forceplate were found.
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| 10. |
- Ödkvist, L. M., et al.
(författare)
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Dynamic posturography in polyneuropathy
- 1992
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Ingår i: Diagnostic procedures and imaging techniques used in neurootology. - Hamburg : Edition M + P. - 3922326366 ; , s. 167-172
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Konferensbidrag (refereegranskat)
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| 11. |
- Ödkvist, L., et al.
(författare)
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The role of osturography and ENG in whiplash injuries
- 1995
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Ingår i: Vertigo, nausea, tinnitus, and hearing loss in central and peripheral vestibular diseases. - Amsterdam : Elsevier. - 9780444821935 ; , s. 259-262
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Konferensbidrag (refereegranskat)
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| 12. |
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| 13. |
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| 14. |
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| 15. |
- Ledin, T., et al.
(författare)
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Dynamic posturography in psychoorganic syndrome
- 1991
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Ingår i: Vertigo, nausea, tinnitus and hypoacusia due to head and neck trauma. - Amsterdam : Excerpta Medica. - 0444811508 ; , s. 367-369
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Konferensbidrag (refereegranskat)
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| 16. |
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| 17. |
- Ledin, T., et al.
(författare)
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Effects of loratadine on postural control
- 1992
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Ingår i: Conservative versus surgical treatment of sensorineural hearing loss, tinnitus, vertigo and nausea. Vol. 19. - Hamburg : Werner Rudat. - 3922326374 ; , s. 175-181
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 18. |
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| 19. |
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| 20. |
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| 23. |
- Möller, Claes, 1950-, et al.
(författare)
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Otoneurological findings in workers exposed to styrene
- 1990
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Ingår i: Scandinavian Journal of Work, Environment and Health. - : Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 16:3, s. 189-194
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Tidskriftsartikel (refereegranskat)abstract
- An otoneurological test battery was administered to 18 workers with long-term exposure (6-15 years) to styrene at levels well below the current Swedish limit (110 mg/m3). The results were compared with those of a reference group. Disturbances were found in the central auditory pathways of seven workers. Tests reflecting central processing of impulses from different sensory equilibrium organs were abnormal for 16 workers. The most relevant tests seemed to be static posturography and the rotatory visual suppression test. In the posturography the styrene group had a significantly larger sway area than the reference group. In the visual suppression test, the styrene workers displayed a significantly poorer ability to suppress vestibular nystagmus than the reference group. It was concluded that styrene exposure in industrial environments at moderate or low levels causes central nervous system disturbances which are not always diagnosable with psychometric tests but can be apparent in special otoneurological tests.
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| 24. |
- Möller, Claes, 1950-, et al.
(författare)
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Plasticity of compensatory eye movements in rotatory tests. II : the effect of voluntary, visual, imaginary, auditory and proprioceptive mechanisms
- 1990
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Ingår i: Acta Oto-Laryngologica. - 0001-6489 .- 1651-2251. ; 109:3, s. 168-178
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Tidskriftsartikel (refereegranskat)abstract
- Two groups of 10 healthy volunteers each with a mean age of 28 years (17-39) were tested in low-frequency rotatory experiments (sinusoidal harmonic acceleration, SHA), at frequencies of 0.01-0.32 Hz. The purpose was to ascertain whether voluntary enhancement and reduction of gain and phase occurred with voluntary performances. The different tests were alertness in darkness, stationary and moving targets, imaginary stationary and moving targets in darkness, proprioceptive moving targets and acoustic stationary and moving targets. Alertness tests in darkness demonstrated a gain increase (0.5-0.7) at 0.01-0.32 Hz, and a decreasing phase lead (40-2 degrees) with increasing frequency. The alertness tests served as a reference for the other tests. In tests with stationary targets, the gain reached unity and the phase was almost 0 degrees. In imaginary stationary target tests, gain and phase were significantly increased compared with alertness. Stationary acoustic targets in darkness significantly enhanced the gain. An increased phase lead was also found. In visual suppression tests (moving target), the gain was near 0. In imaginary moving target tests, the gain decreased significantly. In darkness the gain was significantly more depressed with a proprioceptive moving target than during imaginary moving target. Testing with proprioceptive + acoustic moving target in darkness, displayed an additional gain depression and negative phase at 0.08 Hz. The conclusion is that the influence of non-vestibular mechanisms substantially affects low frequency sinusoidal rotatory testing.
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| 25. |
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| 26. |
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| 27. |
- Möller, Claes, 1950-, et al.
(författare)
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Usher syndrome : an otoneurologic study
- 1989
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Ingår i: The Laryngoscope. - : Wiley. - 0023-852X .- 1531-4995. ; 99:1, s. 73-79
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Tidskriftsartikel (refereegranskat)abstract
- Usher syndrome is an autosomal recessive disorder characterized by severe hearing loss or deafness and retinitis pigmentosa. Eleven families with 25 affected members were studied. The test battery included genetic studies, clinical examination, audiological, ophthalmologic, and otoneurological tests, and magnetic resonance imaging. Sixteen affected persons had profound hearing loss or were considered anacusic, with absent bilateral vestibular responses. These patients had varying degrees of retinitis pigmentosa. These 16 patients were considered to have type I Usher syndrome. Nine persons were diagnosed as Usher type II with a moderate to profound hearing loss, normal vestibular function, and retinitis pigmentosa of varying degree. Magnetic resonance imaging was normal in all cases. Otoneurological tests indicated no central nervous system disturbances. The conclusion is that hearing loss and balance problems in Usher syndrome are due to inner ear damage with no evidence of central nervous system disturbances. Furthermore, the ataxia seen in Usher type I is due to a combination of retinitis pigmentosa and bilateral peripheral vestibular deficiency.
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| 28. |
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| 29. |
- Niklasson, M., et al.
(författare)
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Are deficits in the equilibrium system relevant to the clinical investigation of solvent-induced neurotoxicity?
- 1997
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Ingår i: Scandinavian Journal of Work, Environment and Health. - 0355-3140 .- 1795-990X. ; 23:3, s. 206-213
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The diagnosis of solvent-induced chronic toxic encephalopathy is commonly based on case histories of exposure to solvents, symptoms, and deficits on psychometric tests. It has previously been demonstrated that long-term solvent-exposed workers have disturbances of the equilibrium system. The correlation between these disturbances and the diagnosis of chronic toxic encephalopathy has been analyzed in the present study. MATERIAL AND METHODS: Sixty men, consecutively admitted due to the suspicion of this syndrome, were investigated and classified into 3 groups--solvent-induced chronic toxic encephalopathy, incipient chronic toxic encephalopathy and nonchronic toxic encephalopathy. They were all examined using an otoneurological test battery, including analysis of saccades, smooth pursuit, visual suppression of the vestibular ocular reflex, and dynamic posturography. RESULTS: Compared with healthy referents several of the subjects, even in the nonchronic toxic encephalopathy group, showed a reduced visual suppression ability, a prolonged latency of saccades, and pathological posturographic results. Some otoneurological tests correlated with the duration of exposure and the results of psychometric tests representing memory and perceptual skills. Nevertheless, there was no significant group correlation between the otoneurological findings and the diagnosis of chronic toxic encephalopathy. CONCLUSION: Disturbances revealed by an otoneurological investigation have so far not been considered in the diagnosis of chronic toxic encephalopathy. Our results indicate that an otoneurological test battery adds worthwhile information about lesions within the brainstem-cerebellar complex not revealed by a psychometric investigation.
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| 30. |
- Thoumas, K.-Å., et al.
(författare)
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MR imaging in solvent-induced chronic toxic encephalopathy
- 1996
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Ingår i: Acta Radiologica. - : SAGE Publications. - 0284-1851 .- 1600-0455. ; 37:2, s. 177-179
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: To use MR to examine patients with CNS symptoms indicating chronic intoxication. Material and Methods: Thirty-two subjects exposed to industrial solvents for 5 to 28 years and 40 age-matched, healthy controls were examined. Results: All patients showed decreased signal in the basal ganglia on T2-weighted images. In 11 of the patients the white matter showed diffuse hyperintensity with loss of the grey-white matter discrimination and with distinct periventricular hyperintensities in 5 of the patients. The controls had no pathological changes in the brain. Conclusion: Although the relatively small number of patients may obscure the significance, findings observed on T2-weighted images were patchy periventricular hyperintensities and hypointensities in the basal ganglia. Fast spin-echo is a good technique with fast acquisition of images with true spin-echo contrast features.
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| 31. |
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| 32. |
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| 33. |
- Ödkvist, L. M., et al.
(författare)
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Dynamic posturography
- 1990
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Ingår i: Wissenschaftliche Zeitschrift der Humboldt-Universität zu Berlin : Neurootologie I. ; 39, s. 359-360
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Tidskriftsartikel (refereegranskat)
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| 34. |
- Ödkvist, L. M., et al.
(författare)
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Dynamic posturography
- 1991
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Ingår i: Vestibular diagnosis and neuro-otosurgical management of the skull base. - : Demeter Verlag. - 3893830278 ; , s. 90-98
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Konferensbidrag (refereegranskat)
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| 35. |
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| 36. |
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| 37. |
- Ödkvist, L. M., et al.
(författare)
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When and how to use Gentamicin in the treatment of Meniere's disease
- 1997
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Ingår i: Acta oto-laryngologica. Supplementum. - : Informa UK Limited. - 0365-5237 .- 1651-2464 .- 0001-6489 .- 1651-2251. ; 117:S526, s. 54-57
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Tidskriftsartikel (refereegranskat)abstract
- Gentamicin given as local therapy for severe Meniere's disease is of considerable value in the control of vertigo. The ototoxic antibiotic is instilled through the tympanic membrane causing a peripheral vestibular loss and possibly also diminished endolymph production. In order to achieve the best results with gentamicin treatment it is of utmost importance that the diagnosis is correct. Given to a patient with vertigo of other than peripheral origin, the outcome would be worsening of the existing symptoms and addition of new ones. The method should be used only by physicians who are very familiar with vertigo and otology, and only in patients with such a disturbing degree of vertigo that they are well motivated to receive treatment. Thorough information regarding the disease, the treatment procedure and the symptoms caused by a unilateral peripheral vestibular loss should be given to the patient. Vestibular rehabilitation, including movement therapy, should be given by the physician or, preferably, a well trained physiotherapist on an individual basis or in patient groups together with written practice programmes for use at home. Vertigo attacks are usually relieved in 95% of patients. Twenty percent of patients experience an added hearing loss in the treated ear, although this number is reduced if the treatment is given as a single installment on consecutive days with extra installments given one month later if the vertigo remains.
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| 38. |
- Ödkvist, Lars, 1935-, et al.
(författare)
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Neurootology in neck trauma patients
- 2004
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Ingår i: Bárány Society XXIII International Congress,2004. ; , s. 156-156
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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