[External ear duplication, a rare branchial arch abnormality].
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Branchial Region↗
Biomedical subjects
V Baschek
Publications and source records attributed to V Baschek.
[The auditory, somatosensory and visual evoked potentials in the oto-neurologic diagnosis (author's transl)].
The theory of a signal averaging system for noninvasive electro-diagnosis and the measurements of auditory, somatosensory and visual evoked responses have been explained. This diagnosis as a powerful new tool has been demonstrated in different patients with cerebellopontine angle tumor, hydrocephalus, brain stem vascular disease, encephalomyelitis and for determining the hearing threshold in infants.
Aged↗
[The registration of brain stem evoked responses and middle latency with air and bone conduction stimuli in the evaluation of hearing disorders (author's transl)].
The theory and practice to record the brain stem response and middle latency have been described. Normative data and sources of error have been presented. The early evoked potentials are a powerful tool, to determine the degree of hearing loss in infants and to detect possible brain stem lesions. This exact diagnosis is an assumption for a successful rehabilitation.
Acoustic Impedance Tests↗
[The indication for brain stem evoked response and the effect of click rate and stimulus intensity on the latencies of the auditory evoked potentials (author's transl)].
After consideration of audiologic and neurologic applications for the brain stem auditory evoked response, the effect of click rate by constant stimulus intensity has been demonstrated. Normative data are presented of wave V's threshold and latency by testing different intensities.
Audiometry↗
[The influence of cerebral aging on directional hearing and the indication to applicate a binaural hearing aid (author's transl)].
For demonstrating the influence of cerebral growing old on directional hearing three groups of 20--30 years, 40--50 years and 70--90 years old persons have been tested. It could be shown that the ability to differentiate small changes of direction was diminished, the old persons recognized only changes of 50 degrees and 60 degrees to 100%. The indication to applicate a stereophonic hearing aid has been discussed and the importance to select patients by testing directional hearing for fitting binaural aids is emphasized.
Adult↗
[The influence of experimental vestibular stimulation on directional hearing (author's transl)].
Interaural differences of time and intensity do not explain the good directional hearing capacity of persons with one deaf ear or asymmetric hearing loss. These persons estimate the direction of sounds by head movements. The alteration of sounds depends on the amplitude of the head movement, on the degree of turning the head and on a normal vestibular system. The influence of vestibular stimulation on directional hearing and the resulting virtual alterations on the direction of sound could be demonstrated.
Acoustic Stimulation↗
[Symmetrical lipomatosis of the throat (Madelung's disease) (author's transl)].
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Functional Laterality↗
[Stapes fixation and proximal symphalangism caused by autosomal dominant transmission (author's transl)].
A family showed in four generations the syndrome of stapes fixation and proximal symphalangism with changing expressivity caused by autosomal dominant transmission.
Abnormalities, Multiple↗
[Testing directional hearing with a modified artificial head recording system (author's transl)].
Previous methods for testing directional hearing are described and a new directional hearing test with a modified artificial head recording system is demonstrated. The new method complies well with natural conditions and allows the possibility of testing different hearing losses. The results of testing in 110 non-exercised subjects are discussed.
Functional Laterality↗
[The role of the glycerol test for diagnosis and treatment of Menière disease (author's transl)].
60 patients--25 with different hearing losses and 35 with Menière disease--underwent the glycerol test. It was demonstrated that only the group with endolymphatic hydrops showed in about 60% a positive test result. The meaning of the glycerol test for differential diagnosis of Menière disease from other diseases with attack vertigo is discussed and the role to select the patients for endolymphatic sac surgery is emphasized.
Adult↗
[A new method of testing directional hearing (author's transl)].
Directional hearing is demonstrated by a test in which a model "hears" loudspeaker impulses at known changes of angle. The sounds are recorded and then presented via headphones to listeners. If the subject notices a change he gives a visual signal and the appropriate change of direction is noted by the tester. -In 40 normal hearing test subjects, 20 who were blind recognized more than 50% of changes of direction of 4 degrees, and 20 with normal vision achieved similar success with direction changes of 5 degrees. Utilizing tape recorder and headphones the advantage of this method is its simplicity.
Blindness↗