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  • 1
    Electronic Resource
    Electronic Resource
    Buchbesprechungen (1971)
    Springer
    Journal of molecular medicine 49 (1971), S. 170-176 
    Details
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01496816
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  • 2
    Electronic Resource
    Electronic Resource
    Eigenschaften akustisch evozierter Potentiale bei Gleichspannungsregistrierung (1974)
    Springer
    European archives of oto-rhino-laryngology and head & neck 207 (1974), S. 508-508 
    Details
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An improved recording technique for artefact suppression and automatic dc-drift compensation was used to average EEG-periods of 4 s duration with full computer control of sound frequency and intensity. The arrangement allows the simultaneous record of acoustic evoked potentials and sound induced dc-changes. Investigations have been made using tone sequencies of variable duration, repetition rate, intensity and frequency. Any noticeable difference in the sound stimulus yields a negativ deflection like N1 according to shape and latency with a marked dependence of changes in frequency. Sounds with intervals not longer than about 500 ms are perceived as one event giving an additional negative dc-change, on which the N1-peaks appear as superimposed, while the P2-amplitudes are normally gone. The results are discussed with respect to classical ERA- and CNV-methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464169
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  • 3
    Electronic Resource
    Electronic Resource
    Ableitung von intratemporalen Aktionspotentialen des N. facialis im Ă€ußeren Gehörgang (1974)
    Springer
    European archives of oto-rhino-laryngology and head & neck 207 (1974), S. 484-486 
    Details
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The facial nerve of the cat has been electrically stimulated below the stylomastoid foramen. Antidromic action potentials were recorded from the facial nerve and, additionally, by placing electrodes in the tympanon and in the external meatus. The electronic evaluation of the potentials by using an averager (Linc 8) made it possible to identify an action potential of 300–400 ÎŒs latency, which was correlated to the electrical stimulus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464144
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  • 4
    Electronic Resource
    Electronic Resource
    Langzeitimplantation von Elektroden zur Elektrostimulation des N. acusticus im Tierexperiment (1979)
    Springer
    European archives of oto-rhino-laryngology and head & neck 223 (1979), S. 301-303 
    Details
    ISSN: 1434-4726
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Wire electrodes were implanted into the auditory nerve of four cats via the transoccipital approach. In the same session recording electrodes were fixed over the acoustic cortex. Evoked potentials were recorded after electric stimulation of the acoustic nerve and after acoustic stimulation of the contralateral ear. The level of the electrically induced responses was nearly constant for several months. Shape and latency of the potentials did not depend on the modality of the stimuli. The carefully investigated interaction of acoustic and electric stimulation showed no significant difference of both stimuli. In acoustically evoked potentials adaptation was more prominent, while in electrically evoked potentials higher amplitudes could be seen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01109554
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  • 5
    Electronic Resource
    Electronic Resource
    Korrelationsanalyse von gemittelten und ungemittelten evozierten Potentialen (1971)
    Springer
    Biological cybernetics 9 (1971), S. 22-26 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Description / Table of Contents: Zusammenfassung Es wird eine Möglichkeit beschrieben, wie mit Hilfe der Korrelationsrechnung die BeitrĂ€ge der einzelnen EEG-Potentialabschnitte zu dem gemittelten evozierten Potential abgeschĂ€tzt werden können. Am Beispiel der akustisch evozierten Potentiale mit BerĂŒcksichtigung des Gleichspannungsanteils wird festgestellt, daß die gemittelten Ergebnisse als reprĂ€sentativ fĂŒr das ungemittelte Potential anzusehen sind. Weiter wird gezeigt, daß es bei Kenntnis des Reizzeitpunktes weitgehend möglich ist, Potentiale mit Reizantwort von solchen ohne Reizantwort zu trennen.
    Notes: Summary A possibility is described to determine the contribution of the single eeg-potential to the averaged evoked potential by calculation of the correlation coefficient. Application on acoustic evoked potentials including the dc-component shows that the averaged results are representative for the unaveraged potential. In addition it is possible to separate with high statistical probability single potentials with stimulus response from those without response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00272556
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  • 6
    Electronic Resource
    Electronic Resource
    On-Line Computereinsatz in der Ganzkörperplethysmographie zur Berechnung der mittleren Resistance (1974)
    Springer
    Lung 151 (1974), S. 223-231 
    Details
    ISSN: 1432-1750
    Keywords: Bodyplethysmography ; Average Airway Resistance ; On-Line Computer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die bisher ĂŒbliche Bestimmung der Resistance gegen visköse StrömungswiderstĂ€nde ist aus dem Druck-Strömungs-Diagramm nur möglich, wenn keine Phasenverschiebung zwischen Druck und StromstĂ€rke vorliegt. Aus dem Druck-Volumen-Diagramm lĂ€ĂŸt sich auch bei Phasenverschiebungen (durch Kompression der Atemluft) die visköse Atemarbeit korrekt bestimmen. Der Quotient aus den FlĂ€chen des Druck-Volumen- und des Fluß-Volumen-Diagrammes ergibt eine mittlere Resistance. Die FlĂ€chenberechnung wird im on-line-Verfahren von einem Laborrechner durchgefĂŒhrt. Bei 100 Probanden wurden außerdem spirometrische, blut- und atemgasanalytische Messungen durchgefĂŒhrt. Die mittlere Resistance zeigte die engsten Korrelationen zu den anderen Parametern und erweist sich dadurch als der bessere ReprĂ€sentativwert fĂŒr die funktionnelle Beurteilung einer obstruktiven Lungenerkrankung.
    Notes: Abstract The present determination of airway resistance from the pressure-flow curve is not correct when there is a phase shift between pressure and flow. The viscous work of breathing can be calculated from the pressure-volume diagram even when there is a phase shift due to air compression. The quotient of the squares of the pressure-volume curve and of the flow-volume curve yields the average airway resistance of a breath. These squares are calculated on-line by a laboratory computer. In addition to the body plethysmographic values we measured spirometric values blood gases and alveolar oxygen pressure in 100 patients with CNSLD or bronchial asthma. The average resistance has shown the closest correlations, so that it can be regarded as the best representative for the functional assessment of an obstructive lung disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02095388
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  • 7
    Electronic Resource
    Electronic Resource
    Ein Computerprogramm fĂŒr die Ergometrie (1972)
    Springer
    Lung 147 (1972), S. 245-250 
    Details
    ISSN: 1432-1750
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary A computer program for a PDP-12 (Digital Equipment) for on-line processing of ergometric data is described. The primary signals are: pneumotachogram, continuous values of pO2 and pCO2 of breathing air, heart rate, blood pressure and ergometric load (Watt). From these values the following parameters are calculated and printed every minute: breathing frequency, minute volume of breathing, workload, O2-uptake, CO2-release, breathing equivalent for O2, alveolar ventilation for CO2, mean end-expiratory pO2 and pCO2, heart rate, O2-uptake per heart beat and blood pressure. The primary signals are displayed continuously on a scope. All calculated values and the personal data are stored on tape and may be reprinted anytime. The program may be easily enlarged for calculation of further secondary values like increase of heart rate per unit of work load.
    Notes: Zusammenfassung Es wurde ein Programm fĂŒr einen PDP-12-Rechner beschrieben, das die on-line-Verarbeitung von Meßsignalen in der Ergometrie gestattet. Signale: Pneumotachogramm, kontinuierliche O2- und CO2-Partialdrucke der Atemluft, Pulsfrequenz, Blutdruck, Watteinstellung am Ergometer. Hieraus werden fĂŒr jede Minute folgende GrĂ¶ĂŸen berechnet und am Ende jeder Minute graphisch ausgedruckt: Atemfrequenz, Atemminutenvolumen, Watt, O2-Aufnahme, CO2-Abgabe, AtemĂ€quivalent fĂŒr O2, alveolare Ventilation fĂŒr CO2, mittlere endexspiratorische O2- und CO2-Partialdrucke, Pulsfrequenz, Sauerstoffpuls, Blutdruck. Die PrimĂ€rsignale können wĂ€hrend der Messung auf dem Bildschirm verfolgt werden. Alle berechneten Werte werden fortlaufend — zusammen mit den Personendaten — auf Band abgespeichert und können jederzeit wieder abgerufen werden. Eine Erweiterung des Programms zur Berechnung zusĂ€tzlicher SekundĂ€rwerte (wie Leistungspulsindex) ist leicht möglich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02100556
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  • 8
    Electronic Resource
    Electronic Resource
    Gemittelte EEG-Potentiale bei olfactorischer Reizung (1966)
    Springer
    PflĂŒgers Archiv 292 (1966), S. 76-80 
    Details
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird eine olfactometrische Anlage beschrieben, die es erlaubt, zeitlich und quantitativ definierte Geruchsreize zu setzen. Dadurch wurde es möglich, auf Geruchsreize folgende EEG-Abschnitte am wachen Menschen zu mitteln. 500 msec bis 1000 msec nach Beginn des Geruchsreizes wurde ein mit der Geruchsempfindung korreliertes Potential erhalten.
    Notes: Summary An olfactometer is described allowing stimulation with odors well defined in respect of time and intensity. Thereby a trigger pulse was available for averaging the human EEG. 500 msec to 1000 msec after start of odor stimulation a potential correlated with odor sensation was recorded.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00413126
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  • 9
    Electronic Resource
    Electronic Resource
    Elektrophysiologische Korrelation der Stevensschen Potenzfunktion und objektive Schwellenmessung am Vibrationssinn des Menschen (1966)
    Springer
    PflĂŒgers Archiv 290 (1966), S. 114-123 
    Details
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Mit Hilfe einer elektronischen Mittelungsanlage wurde die ReizstĂ€rken- und FrequenzabhĂ€ngigkeit der reizsynchronen corticalen Potentiale des Menschen bei vibratorischer Reizung der Haut untersucht. 2. Die experimentell ermittelten IntensitĂ€tsfunktionen gehorchen dem Plateau-Stevensschen Potenzgesetz, das auch fĂŒr die rein subjektiv gewonnene IntensitĂ€tsfunktion der EmpfindungsstĂ€rke gilt. 3. Die Exponenten dieses Potenzgesetzes sind sowohl fĂŒr die subjektive als auch fĂŒr die objektive IntensitĂ€tsfunktion zahlenmĂ€ĂŸig vergleichbare GrĂ¶ĂŸen. Dies ermöglicht die Korrelation der objektiven und subjektiven Befunde. 4. Mit EinschrĂ€nkungen lassen sich die dargestellten Ergebnisse auch mit den Resultaten subjektiv gewonnener Schwellenuntersuchungen bei vibratorischer Reizung der Haut korrelieren.
    Notes: Summary 1. The influence of various intensities and frequencies of vibratory stimuli applied to the human skin on the amplitude of the cortical slow evoked potentials was studied by means of an averaging computer CAT 1024. 2. The intensity-functions revealed experimentally follow the power-function of Plateau and Stevens, which holds, too, for the intensity-function of sensation (intensity of stimulus versus intensity of sensation), found in a merely subjective, psychophysical way. 3. The exponents of these power-functions found subjectively are quantitatively well comparable to those found objectively by our method. Thus the subjective sensations can be correlated to objective findings and vice versa. 4. With certain restrictions the findings can also be applied to the results of threshold-measurements following vibratory stimulation of human skin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00363689
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  • 10
    Electronic Resource
    Electronic Resource
    ReizstÀrkenabhÀngigkeit und Stevenssche Potenzfunktion beim optisch evozierten Potential des Menschen (1967)
    Springer
    PflĂŒgers Archiv 293 (1967), S. 256-271 
    Details
    ISSN: 1432-2013
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die ReizstĂ€rkenabhĂ€ngigkeit der Amplitude einer spĂ€ten oberflĂ€chenpositiven Komponente („P 1“; Spitzenlatenz je nach ReizstĂ€rke zwischen 190 und 300 ms) im gemittelten optisch evozierten Potential des Menschen gehorcht einer Potenzfunktion mit dem Exponenten 0,21. Eine Potenzfunktion mit gleichem Exponenten hatte Stevens bei subjektiven Leuchtdichtenbeurteilungen mittels seiner Dynamometermethode im psychophysischen Versuch gefunden. Es wird daher angenommen, daß in der Amplitude der beschriebenen Welle eine analoge VerschlĂŒsselung der Information ĂŒber die Leuchtdichte zu suchen ist. Die Verwendung verschiedener farbiger Lichter ergab keine signifikant verschiedenen Exponenten der ReizstĂ€rken-Amplituden-Beziehung. Auf ParallelitĂ€ten zwischen den vorliegenden Ergebnissen und den Resultaten entsprechender Untersuchungen anderer SinnesmodalitĂ€ten wird hingewiesen.
    Notes: Summary The correlation between the intensity of light-stimulus and the amplitude of averaged human visual responses is studied. From measurements of a late surface-positive wave (“P 1”; peak latency between 190 and 300 ms according to stimulus intensity) a power function with an exponent of 0.21 can be derived. A similar function with the same exponent was found by Stevens in psychological experiments: his subjects had to estimate the brightness of light-signals and to report their estimations by squeezing a dynamometer. It might be suggested that the amplitude of wave “P 1” relates to an analogical coding of the information about stimulus intensity. Differences between some exponents obtained by using colored lights are irrelevant. Parallels between these results and those from other studies of different sensory modalities are drawn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00417123
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