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Biomedical subjects

G Aust

Publications and source records attributed to G Aust.

At least 73 records · Page 4Linked to original sources
PubMed1977

[Equilibriometric findings in partially blind and blind children (author's transl)].

26 of both blind or partially blind children were subjected to equilibriometric tests. By way of a vestibular-ocular test they were given the Rotatory-Intensity-Damping test. During the tests the per and postrotatory nystagmus reactions were electronystagmographicly registrated. For the vestibular-spinal tests the Unterberger's stepping test with photographic registration of the body-sway in the Cranio-Corpo-Gram was used. In most of the children you could identify a definite per and postrotatory reaction in spite of considerable spontaneous reactions. The strong eyelid movements of these patients, the intensive spontaneous deviations and diminished corneo-retinal potential made precise judgement of the electronystagmogram difficult. Comparison between the blind and partially blind children enabled the differences to be objectified. Blind-born children have a higher spontaneous activity, slightly diminished per and postrotatory nystagmus reactions and a diminished bodyequilibrium. These results can be explained on one side by habituation and on the other side by efferent structures, which have an inhibitory effect on the vestibular input.

Adolescent↗
PubMed1977

[Clinical comparison of perrotatory and postrotatory nystagmus characteristics (author's transl)].

Rotatory stimulation is a physiological stimulation of the vestibular canalicular organs. In every day's neurootological routine it is applied in sinusoidal, triangular and trapezoidal shape. The rotatory intensity damping test (RIDT) applies a perrotatory and postrotatory test combination of a trapezoidal stimulus pattern. Thus the perrotatory as well as the postrotatory nystagmus can be recorded during several phases of the after phenomena. In terms of acceleration/time plots the supraliminal perrotatory acceleration exhibits a rectangular or step-like stimulus characteristic. The supramaximal postrotatory stimulus however has a needle-like impulse pattern. The nystagmus reaction being recorded by the ENG is evaluated according to frequency or beat-rate distributions. The perrotatory nystagmus can be linearily optimalized in a linear to linear plot during its maximal reactional dynamics. The postrotatory nystagmus distribution can also be linearily graphed in a nomogram. However this nomogram is a log.log intensity/time-chart. This paper clinically compares per- and postrotatory reactions of the rotatory intensity damping test. It can be seen that this test adds important information to the clinical study of the dizzy patient.

Adult↗
PubMed1976

[Neurootological diagnostic in children by means of cranio-corpo-graphy (author's transl)].

Among the different tests of the neurootological test battery, especially Cranio-Corpo-Graphy, is very useful for objectively investigating children. This method can be performed together with the Unterberger's stepping procedure. Then the blind-folded patient has to make 80-100 steps on the spot. This procedure should be completed within 1 min. For the fotographic recordings lights are installed in a helmet which is placed on the head and are also attached to both shoulders. The Polaroid-film is exposed during the whole duration of the test. Thus the body and head movements can be recorded as light tracings. For evaluating the tracings quantitatively it is necessary to superimpose in a second exposure a coordinate system. We usually take a polar coordinate system which is been produced in the hite of the head of the patient. Typical reactional patterns are used for differentiating peripheral from central or combined peripheral and central vestibular spinal lesions. Especially the Unterberger's stepping procedure is apt to be applied on the children's gaming behaviour. In cases of congenital or early children's torticollis, the amount of angular deflection of the head can be measured by means of Cranio-Corpo-Graphy.

Age Factors↗
PubMed1975

[Electronystagmographic esaminations of caloric latency (author's transl)].

The initial phase of caloric nystagmus has been investigated. The nystagmussignal does not start in a really discrete manner. It shows a development from eye movements which are no clear cut sawtooth signals to the real nystagmus beats with easily detectable slow and fast phases. 601 ENGs of caloric tests have statistically been evaluated during the first 80 sec from the onset of the irrigation. In 68% of all of the reactions there was an underlying spontaneous nystagmus. A same directional spontaneous nystagmus covers the latency period mostly that much, that the latency period is short or hidden. An opposite directional spontaneous nystagmus leads to a prolongation of the latency period. This definition refers to the real saw tooth nystagmus signals, which are beating in the expected direction. A definition of the latency period after the so called initial nystagmoids is being discussed, too.

Adolescent↗
PubMed1975

[Neurootological findings in zoster oticus (author's transl)].

Zoster oticus is an important disorder in neurootological routine diagnostics. However, the neurotoxic zoster virus is not being confined to the nerval periphery. Therefore as well typical peripheral as well as typical central as well as combined reactional patterns are to be found by neurootological functions tests. By selection and adaptation of tests optimal diagnostics can be completed in the vestibular-ocular, the vestibular-spinal and retinal-ocular sensory motory systems. Thus disorders as such can be identified and additionally localised. The peripheral zoster oticus can be differentiated from the central zoster encephalitis. These findings are demonstrated by typical case reports.

Audiometry↗