Dieter Schneider - Academia.edu (original) (raw)
Papers by Dieter Schneider
Ear, Nose & Throat Journal, 2001
We examined the space and temporal distributions of the rotatory evoked brain electrical activity... more We examined the space and temporal distributions of the rotatory evoked brain electrical activity patterns (brain electrical activity mapping of vestibular evoked potentials [VestEP]) in humans. We performed a longitudinal scalp line analysis, transversal line analysis, and clockwise/counterclockwise rotation analysis of the VestEP principal components in 75 healthy persons aged 22 to 30 years (mean: 25.8). We found that the shortest VestEP latencies and the highest amplitudes were registered in a relatively distinct cortical area that is covered by the transversal electrode line T3-C3-Cz-C4-T4, in accordance with the 10/20 international electrode scheme. This area corresponds to the posterior part of the frontal lobe (Brodmann's area 4, the primary motor field of the isocortex) and the anterior parts of the cerebral parietal lobe (the gyrus postcentralis, which corresponds to the primary somatosensory fields, Brodmann's areas 1, 2, and 3). In this article, we discuss a meth...
The international tinnitus journal, 2002
This study was conducted in an attempt to determine the efficacy of neurofeedback (NFB) in the tr... more This study was conducted in an attempt to determine the efficacy of neurofeedback (NFB) in the treatment of patients suffering from vertigo or tinnitus. Results indicated that after NFB, power for delta and theta bands was reduced; however, an increase of power was noted for the alpha bands. Furthermore, normalization was observed for the vestibular evoked potentials (VestEP). After NFB, a normalization of the VestEP was also demonstrated in a patient suffering from a bilateral tinnitus. A follow-up study (12 months after NFB) demonstrated that the VestEP were normal.
The international tinnitus journal, 2000
We performed a retrospective study of 131 patients who underwent microsurgical removal of statoac... more We performed a retrospective study of 131 patients who underwent microsurgical removal of statoacoustic neuroma at the University of Wuerzburg. Our goal was to evaluate objective audiovestibular findings prior to and after surgery. Our analysis focused on the evaluation of quantitative parameters in speech and pure-tone audiometry and on the reactivity of the vestibular system.
The international tinnitus journal, 1996
The Brain Electrical Activity Mapping (BEAM) of Vestibular Evoked Potentials (VestEP) is a new me... more The Brain Electrical Activity Mapping (BEAM) of Vestibular Evoked Potentials (VestEP) is a new method in the toolbox of the neurootologist. Two cases of bilateral vestibular loss, diagnosed by classical neurootological methods (highlighted by caloric and optokinetic tests' electronystagmography recording), are reported. The additional information, provided by the Vestibular Evoked Potentials (VestEP) and its high clinical significance for a more accurate neurootologic diagnosis are discussed.
The international tinnitus journal, 1996
Brain Electrical Activity Mapping of Vestibular Evoked Potentials (BEAM-VestEP) is a new technolo... more Brain Electrical Activity Mapping of Vestibular Evoked Potentials (BEAM-VestEP) is a new technology for investigation of the spatial and temporal properties of a rotationally-induced brain electrical events. The method consists of multichannel EEG registration and mapping of the brain isoelectrical contours during short-lasting repetitive angular accelerations. A special data bank containing more than 400 BEAM-VestEP investigations on more than 300 persons, either symptom free volunteers or neurotological patients suffering from vertigo, tinnitus, sudden hearing loss, acoustic tumors, balance disorders, has been created for this study. The VestEP wave set consists of 5 - 7 positive/negative wave components, appearing within the time interval of 70 - 850 ms after the onset of the acceleratory step stimulus. The principle components analysis reveals that the shortest latencies and the highest amplitudes of the VestEPs can be registered from the central transversal line of electrodes, ...
The international tinnitus journal, 1995
Clinical evidence suggests that over-excitation or disinhibition of structures in the brain occur... more Clinical evidence suggests that over-excitation or disinhibition of structures in the brain occurs in tinnitus patients.(1,2) Brain electrical activity mapping of vestibular evoked potentials (BEAM-VbEP method) provides an electrophysiologic approach of quantification of function in brain cortex. The effect of tinnitus on the BEAM-VbEP image was examined in two groups of acoustic tumor patient Group A (n = 24) reported tinnitus and Group B (n = 22) did not. Statistically significant differences in the VbEP parameters have been identified between the two groups. The amplitude of the III/IV peak-to-peak component elicited by the rotation to the affected side, is higher (P < 0.05) in the tinnitus group than in the non-tinnitus group. Latencies of the late VbEP components (III, IV, and V) are shorter. In subgroup III, latency was 317.9 +/- 37.5 ms in the tinnitus group versus 335.5 +/- 30.9 ms in non-tinnitus group (p < 0.05); subgroup IV's component of 437.1 +/- 35.4 ms versu...
The international tinnitus journal, 2000
Tinnitus is one of the most important symptoms in neurootology after vertigo, nausea, and hearing... more Tinnitus is one of the most important symptoms in neurootology after vertigo, nausea, and hearing loss. In most cases, the origin of the tinnitus remains inexplicable. Well-known, however, is that tinnitus may arise in any part of the hearing pathway (i.e., both within the cochlea receptor and in the temporal lobe and projections). Tinnitus also is associated frequently with vertigo, nausea and hearing loss. An age predominance exists, with tinnitus more common among those older than 40 years. From this starting point, a great demand exists today for new ideas and developments in the diagnosis and treatment of tinnitus.
MMW Fortschritte der Medizin, Jan 29, 2003
The international tinnitus journal, 2000
The competitive-kinesthetic interaction therapy is based on several clinical observations of pati... more The competitive-kinesthetic interaction therapy is based on several clinical observations of patients who are treated with the Brügger therapy in the "Murnau approach" and who are suffering from different pain syndromes in their movement system. These patients reported definite lessening of their tinnitus, including (in some cases) a complete cessation of their subjective ear noise, as a result of our therapy on the movement system. Our goal is to modulate and automate the civilizatory unforable engraved individual global movement patterns. This success, which accompanied the therapeutic removal of movement imbalance and related posture and motion disorders, suggests the possibility of influencing the balance-surveying organs of the complex equilibrium system, summarizing the information from the equilibrium tetrad within a central space-oriented data processing system, via the muscles of the entire locomotor system. A very important point is that the subjective improvemen...
Neuroscience Letters, 1998
Balance control relies on somesthetic, visual and vestibular afferences, their central processing... more Balance control relies on somesthetic, visual and vestibular afferences, their central processing, and adequate motor responses. We studied the consequences on postural control of the suppression of visual afferences by eye closure, during a dynamic posturographic test in six sportsmen and 14 non-sportsmen. Suppression of visual afferences during the test led to a prolongation of the pattern initially recorded with
Acta Oto-Laryngologica, 1995
A group of 150 patients was clinically observed using a complete battery of neurootological metho... more A group of 150 patients was clinically observed using a complete battery of neurootological methods. The patients were believed to suffer from Menière's disease (MD). After taking anamnestic data [NODEC III] and performing calorimetry, cranio-corpo-graphy and audiology tests we could confirm a former established diagnosis of MD in a few cases only.
Acta Oto-Laryngologica, 1991
Acta Oto-Laryngologica, 1991
Acta Oto-Laryngologica, 1989
ABSTRACT
Acta Oto-laryngologica, 1989
A set of 1,021 patients who were investigated at our Department over the last few years was inves... more A set of 1,021 patients who were investigated at our Department over the last few years was investigated in this study. Each patient underwent Cranio-Corpo-Graphy, and other related investigations. The patients' CCG's were quantified using a specially developed computer scanning method, and a computerized spreadsheet databank was thus created. Also included in the study were their clinical profiles, as charted using the NODEC III questionnaire. The isolation and comparison of various data subsets enables us to draw broad correlations between clinical and CCG findings, and permits us to establish 'normal values' for various parameters. It is seen that cranio-corpography is a reliable screening method for the topodiagnosis of vertigo.
Acta Oto-laryngologica, 1991
ABSTRACT The horizontal and vertical optokinetic nystagmus is a jerk nystagmus which can be provo... more ABSTRACT The horizontal and vertical optokinetic nystagmus is a jerk nystagmus which can be provoked by moving repetitive visual stimuli through the visual field in a horizontal or vertical plane. It can be evoked by the use of a tape drum or single point tracking stimuli. There is neurophysiological evidence that the ipsilateral occipital lobe controls persuit movements to the ipsilateral side. It is likely that each occipital lobe produces contralatera1 persuit movements under certain conditions. In a combined study we have investigated test persons with the polygraphic 5-channel- ENG technique and at the same time with the brain electrical activity mapping technique. Comparisons of scalp distributions of EEG derived potentials evoked in different experimental conditions during optokinetic stimulation provide us with useful information on how the different phases of the optokinetic tracking nystagmus is organized. It is well known that optic nerve and pathway activites can be recorded at widespread regions in the brain. Similar effects seem to hold for the motorcomponents in the various types of spatially organized optokinetic motor movements. Electrical activity was recorded as the potential difference between electrodes beside both eyes in horizontal and vertical positions. We regularly perform the electronystagmography as an office procedure on our neurootological patients. For the brain electrical activity mapping we apply a 16-channel-Picker-Schwartzer- Brain-Mapping-System containing an averager and a computer and a colour monitor of the type Picker-Schwartzer-Brain-Surveyer 11. The electrodes are placed on the scalp according to the international 10-20-electrode placement system, using the 16 positions Fpl, Fp2, F7, F3, F4, F8, T3, C3, C4, T4, T5, P3, P4, T6,Ol and 02. From the 16 EEG-channels the analogue signals undergo an AD-conversion. The brain surveyer then analyzes the EEG signals with respect to typical frequency and amplitude patterns of the superficial brain activity. The results are composed in maps of the calculated brain surface field power and/or frequency bands. The visually evoked potentials serve as a reference from a well known experiment towards new territories of equilibriometry . The VEP is performed binocularly. We then receive series of grand mean potential field maps after chessboard stimulation for the visually evoked potentials. The evaluation of the curves, of the latencies and the scalp locations give us a first topographical survey of this experimentally averaged EEG. Due to its long latency the PlOO component of the visual evoked potential is presumably of cortical origin and its skalp distribution after binocular and monocular stimulation provides a distribution pattern of the multidimensional statistical observations in the basic brain mapping. In these well known experiments spatial aspects of frequency characteristics power and phase angles of the spectral analysis can also be included into our calculations. Range or trajectories of positive and negative extreme values of the Delta Band, the Theta Band, the Alpha Band and the Beta Band can be calculated. Scalp distribution maps of locations of field positive and negative extreme values accumulated at times of maximal global field Acta Otolaryngol Downloaded from informahealthcare.com by Faculty of Medicine at Charles University on 11/21/12 For personal use only. 222 C.-F. Claussen et al. powers or at all sampling times can be calculated as band power of the 4 bands against an average reference or from 1 hemiscull against the other or other standards. All possible wave shapes first undergo a detection an clearing procedure for artefacts and then they are let into the calculation process. Before and after the visually evoked potentials we have performed a normal EEG with eyes closed and eyes open. The spontaneous scalp recorded electroencephalogram is always recorded for several minutes. The scalp distribution of the 4 frequency bands Delta (0-4 cps), Theta ( 4 7 cps), Alpha (8-12 cps), Beta (13-18 cps) is measured together with the field power at varying epochs between 2 and 60 s. Regularly the epochs are chosen for 30 s. Prior to the evaluation with mapping and histograms at the single electrode generators we have cleaned the 16 EEG curves from artefact rich segments. Then we systematically follow with the optokinetic orthogonal stimulus procedure known from our kite optogram. The optokinetic nystagmus is provoked by a single stimulus, which crosses the visual field of the patient in one direction and repeatedly returns from the same dwelling point. Therefore we use the computer regulated LED eyetrack. The stimulus moves over a segment of the horizon of 40". The patient is sitting on a rotatory chair with the head tightly kept in position. The monostimulus runs through 40" of the visual horizon and then disappears. As the next stimulus always follows at the same distance in the same plane and with the…
Acta Oto-laryngologica, 1989
ABSTRACT
Ear, Nose & Throat Journal, 2001
We examined the space and temporal distributions of the rotatory evoked brain electrical activity... more We examined the space and temporal distributions of the rotatory evoked brain electrical activity patterns (brain electrical activity mapping of vestibular evoked potentials [VestEP]) in humans. We performed a longitudinal scalp line analysis, transversal line analysis, and clockwise/counterclockwise rotation analysis of the VestEP principal components in 75 healthy persons aged 22 to 30 years (mean: 25.8). We found that the shortest VestEP latencies and the highest amplitudes were registered in a relatively distinct cortical area that is covered by the transversal electrode line T3-C3-Cz-C4-T4, in accordance with the 10/20 international electrode scheme. This area corresponds to the posterior part of the frontal lobe (Brodmann's area 4, the primary motor field of the isocortex) and the anterior parts of the cerebral parietal lobe (the gyrus postcentralis, which corresponds to the primary somatosensory fields, Brodmann's areas 1, 2, and 3). In this article, we discuss a meth...
The international tinnitus journal, 2002
This study was conducted in an attempt to determine the efficacy of neurofeedback (NFB) in the tr... more This study was conducted in an attempt to determine the efficacy of neurofeedback (NFB) in the treatment of patients suffering from vertigo or tinnitus. Results indicated that after NFB, power for delta and theta bands was reduced; however, an increase of power was noted for the alpha bands. Furthermore, normalization was observed for the vestibular evoked potentials (VestEP). After NFB, a normalization of the VestEP was also demonstrated in a patient suffering from a bilateral tinnitus. A follow-up study (12 months after NFB) demonstrated that the VestEP were normal.
The international tinnitus journal, 2000
We performed a retrospective study of 131 patients who underwent microsurgical removal of statoac... more We performed a retrospective study of 131 patients who underwent microsurgical removal of statoacoustic neuroma at the University of Wuerzburg. Our goal was to evaluate objective audiovestibular findings prior to and after surgery. Our analysis focused on the evaluation of quantitative parameters in speech and pure-tone audiometry and on the reactivity of the vestibular system.
The international tinnitus journal, 1996
The Brain Electrical Activity Mapping (BEAM) of Vestibular Evoked Potentials (VestEP) is a new me... more The Brain Electrical Activity Mapping (BEAM) of Vestibular Evoked Potentials (VestEP) is a new method in the toolbox of the neurootologist. Two cases of bilateral vestibular loss, diagnosed by classical neurootological methods (highlighted by caloric and optokinetic tests' electronystagmography recording), are reported. The additional information, provided by the Vestibular Evoked Potentials (VestEP) and its high clinical significance for a more accurate neurootologic diagnosis are discussed.
The international tinnitus journal, 1996
Brain Electrical Activity Mapping of Vestibular Evoked Potentials (BEAM-VestEP) is a new technolo... more Brain Electrical Activity Mapping of Vestibular Evoked Potentials (BEAM-VestEP) is a new technology for investigation of the spatial and temporal properties of a rotationally-induced brain electrical events. The method consists of multichannel EEG registration and mapping of the brain isoelectrical contours during short-lasting repetitive angular accelerations. A special data bank containing more than 400 BEAM-VestEP investigations on more than 300 persons, either symptom free volunteers or neurotological patients suffering from vertigo, tinnitus, sudden hearing loss, acoustic tumors, balance disorders, has been created for this study. The VestEP wave set consists of 5 - 7 positive/negative wave components, appearing within the time interval of 70 - 850 ms after the onset of the acceleratory step stimulus. The principle components analysis reveals that the shortest latencies and the highest amplitudes of the VestEPs can be registered from the central transversal line of electrodes, ...
The international tinnitus journal, 1995
Clinical evidence suggests that over-excitation or disinhibition of structures in the brain occur... more Clinical evidence suggests that over-excitation or disinhibition of structures in the brain occurs in tinnitus patients.(1,2) Brain electrical activity mapping of vestibular evoked potentials (BEAM-VbEP method) provides an electrophysiologic approach of quantification of function in brain cortex. The effect of tinnitus on the BEAM-VbEP image was examined in two groups of acoustic tumor patient Group A (n = 24) reported tinnitus and Group B (n = 22) did not. Statistically significant differences in the VbEP parameters have been identified between the two groups. The amplitude of the III/IV peak-to-peak component elicited by the rotation to the affected side, is higher (P < 0.05) in the tinnitus group than in the non-tinnitus group. Latencies of the late VbEP components (III, IV, and V) are shorter. In subgroup III, latency was 317.9 +/- 37.5 ms in the tinnitus group versus 335.5 +/- 30.9 ms in non-tinnitus group (p < 0.05); subgroup IV's component of 437.1 +/- 35.4 ms versu...
The international tinnitus journal, 2000
Tinnitus is one of the most important symptoms in neurootology after vertigo, nausea, and hearing... more Tinnitus is one of the most important symptoms in neurootology after vertigo, nausea, and hearing loss. In most cases, the origin of the tinnitus remains inexplicable. Well-known, however, is that tinnitus may arise in any part of the hearing pathway (i.e., both within the cochlea receptor and in the temporal lobe and projections). Tinnitus also is associated frequently with vertigo, nausea and hearing loss. An age predominance exists, with tinnitus more common among those older than 40 years. From this starting point, a great demand exists today for new ideas and developments in the diagnosis and treatment of tinnitus.
MMW Fortschritte der Medizin, Jan 29, 2003
The international tinnitus journal, 2000
The competitive-kinesthetic interaction therapy is based on several clinical observations of pati... more The competitive-kinesthetic interaction therapy is based on several clinical observations of patients who are treated with the Brügger therapy in the "Murnau approach" and who are suffering from different pain syndromes in their movement system. These patients reported definite lessening of their tinnitus, including (in some cases) a complete cessation of their subjective ear noise, as a result of our therapy on the movement system. Our goal is to modulate and automate the civilizatory unforable engraved individual global movement patterns. This success, which accompanied the therapeutic removal of movement imbalance and related posture and motion disorders, suggests the possibility of influencing the balance-surveying organs of the complex equilibrium system, summarizing the information from the equilibrium tetrad within a central space-oriented data processing system, via the muscles of the entire locomotor system. A very important point is that the subjective improvemen...
Neuroscience Letters, 1998
Balance control relies on somesthetic, visual and vestibular afferences, their central processing... more Balance control relies on somesthetic, visual and vestibular afferences, their central processing, and adequate motor responses. We studied the consequences on postural control of the suppression of visual afferences by eye closure, during a dynamic posturographic test in six sportsmen and 14 non-sportsmen. Suppression of visual afferences during the test led to a prolongation of the pattern initially recorded with
Acta Oto-Laryngologica, 1995
A group of 150 patients was clinically observed using a complete battery of neurootological metho... more A group of 150 patients was clinically observed using a complete battery of neurootological methods. The patients were believed to suffer from Menière's disease (MD). After taking anamnestic data [NODEC III] and performing calorimetry, cranio-corpo-graphy and audiology tests we could confirm a former established diagnosis of MD in a few cases only.
Acta Oto-Laryngologica, 1991
Acta Oto-Laryngologica, 1991
Acta Oto-Laryngologica, 1989
ABSTRACT
Acta Oto-laryngologica, 1989
A set of 1,021 patients who were investigated at our Department over the last few years was inves... more A set of 1,021 patients who were investigated at our Department over the last few years was investigated in this study. Each patient underwent Cranio-Corpo-Graphy, and other related investigations. The patients' CCG's were quantified using a specially developed computer scanning method, and a computerized spreadsheet databank was thus created. Also included in the study were their clinical profiles, as charted using the NODEC III questionnaire. The isolation and comparison of various data subsets enables us to draw broad correlations between clinical and CCG findings, and permits us to establish 'normal values' for various parameters. It is seen that cranio-corpography is a reliable screening method for the topodiagnosis of vertigo.
Acta Oto-laryngologica, 1991
ABSTRACT The horizontal and vertical optokinetic nystagmus is a jerk nystagmus which can be provo... more ABSTRACT The horizontal and vertical optokinetic nystagmus is a jerk nystagmus which can be provoked by moving repetitive visual stimuli through the visual field in a horizontal or vertical plane. It can be evoked by the use of a tape drum or single point tracking stimuli. There is neurophysiological evidence that the ipsilateral occipital lobe controls persuit movements to the ipsilateral side. It is likely that each occipital lobe produces contralatera1 persuit movements under certain conditions. In a combined study we have investigated test persons with the polygraphic 5-channel- ENG technique and at the same time with the brain electrical activity mapping technique. Comparisons of scalp distributions of EEG derived potentials evoked in different experimental conditions during optokinetic stimulation provide us with useful information on how the different phases of the optokinetic tracking nystagmus is organized. It is well known that optic nerve and pathway activites can be recorded at widespread regions in the brain. Similar effects seem to hold for the motorcomponents in the various types of spatially organized optokinetic motor movements. Electrical activity was recorded as the potential difference between electrodes beside both eyes in horizontal and vertical positions. We regularly perform the electronystagmography as an office procedure on our neurootological patients. For the brain electrical activity mapping we apply a 16-channel-Picker-Schwartzer- Brain-Mapping-System containing an averager and a computer and a colour monitor of the type Picker-Schwartzer-Brain-Surveyer 11. The electrodes are placed on the scalp according to the international 10-20-electrode placement system, using the 16 positions Fpl, Fp2, F7, F3, F4, F8, T3, C3, C4, T4, T5, P3, P4, T6,Ol and 02. From the 16 EEG-channels the analogue signals undergo an AD-conversion. The brain surveyer then analyzes the EEG signals with respect to typical frequency and amplitude patterns of the superficial brain activity. The results are composed in maps of the calculated brain surface field power and/or frequency bands. The visually evoked potentials serve as a reference from a well known experiment towards new territories of equilibriometry . The VEP is performed binocularly. We then receive series of grand mean potential field maps after chessboard stimulation for the visually evoked potentials. The evaluation of the curves, of the latencies and the scalp locations give us a first topographical survey of this experimentally averaged EEG. Due to its long latency the PlOO component of the visual evoked potential is presumably of cortical origin and its skalp distribution after binocular and monocular stimulation provides a distribution pattern of the multidimensional statistical observations in the basic brain mapping. In these well known experiments spatial aspects of frequency characteristics power and phase angles of the spectral analysis can also be included into our calculations. Range or trajectories of positive and negative extreme values of the Delta Band, the Theta Band, the Alpha Band and the Beta Band can be calculated. Scalp distribution maps of locations of field positive and negative extreme values accumulated at times of maximal global field Acta Otolaryngol Downloaded from informahealthcare.com by Faculty of Medicine at Charles University on 11/21/12 For personal use only. 222 C.-F. Claussen et al. powers or at all sampling times can be calculated as band power of the 4 bands against an average reference or from 1 hemiscull against the other or other standards. All possible wave shapes first undergo a detection an clearing procedure for artefacts and then they are let into the calculation process. Before and after the visually evoked potentials we have performed a normal EEG with eyes closed and eyes open. The spontaneous scalp recorded electroencephalogram is always recorded for several minutes. The scalp distribution of the 4 frequency bands Delta (0-4 cps), Theta ( 4 7 cps), Alpha (8-12 cps), Beta (13-18 cps) is measured together with the field power at varying epochs between 2 and 60 s. Regularly the epochs are chosen for 30 s. Prior to the evaluation with mapping and histograms at the single electrode generators we have cleaned the 16 EEG curves from artefact rich segments. Then we systematically follow with the optokinetic orthogonal stimulus procedure known from our kite optogram. The optokinetic nystagmus is provoked by a single stimulus, which crosses the visual field of the patient in one direction and repeatedly returns from the same dwelling point. Therefore we use the computer regulated LED eyetrack. The stimulus moves over a segment of the horizon of 40". The patient is sitting on a rotatory chair with the head tightly kept in position. The monostimulus runs through 40" of the visual horizon and then disappears. As the next stimulus always follows at the same distance in the same plane and with the…
Acta Oto-laryngologica, 1989
ABSTRACT