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  • 1
    Electronic Resource
    Electronic Resource
    Electroreception and the Ampullæ of Lorenzini in Elasmobranchs (1964)
    [s.l.] : Nature Publishing Group
    Nature 201 (1964), S. 523-523 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] New behaviour experiments with Scyliorkinus canicula, in which local electrical stimulation of the animals was combined with surgical elimination of the ampullae of Lorenzini by means of severing the nerves, have shown that the ampullae may indeed be used as electroreceptors. Denervation of all ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/201523a0
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  • 2
    Electronic Resource
    Electronic Resource
    Sound Reception in the Dogfish (1963)
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 93-94 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] These experiments, affording valuable new evidence about the sensitivity of elasmobranchs to sound, lent new weight to the question how sound stimuli are perceived in these animals. On comparative physiological grounds, the participation of two groups of sense endings seems likely: (1) otolith ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/197093a0
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  • 3
    Electronic Resource
    Electronic Resource
    Lauterzeugung und Schallwahrnehmung bei der Languste (Palinurus vulgaris) (1955)
    Springer
    Cellular and molecular life sciences 11 (1955), S. 330-331 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The sounds produced by the Spiny Lobster,Palinurus vulgaris, and their origin are briefly described. One animal reacted clearly to similar artificial sound stimuli, in some cases even “vocally”. Elimination of both statocysts had no influence on these reactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02158406
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  • 4
    Electronic Resource
    Electronic Resource
    Rotationssinn nach dem Bogengangsprinzip bei Crustaceen (1955)
    Springer
    Cellular and molecular life sciences 11 (1955), S. 407-409 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Blinded crabs (Carcinus maenas andMaja verrucosa) show compensatory eye stalk movements on rotation about a vertical axis, in water and in air. On a sudden arrest of the turntable typical after-effects are observed, which show a striking resemblance to those known from vertebrates. All these reactions are abolished after bilateral elimination of the so-called thread hairs within the statocysts (experiments onMaja). In fresh preparations these hairs can be seen to follow the slightest movements of the surrounding fluid, swaying around their point of attachment. Elimination of the thread hairs does not diminish, but does markedly delay the compensatory eye stalk movements of a blinded crab on rotation about horizontal axes. The latter reactions are abolished if in addition the hook hairs (i.e. the sense hairs of the statolith-bearing type) are destroyed. It is concluded that the statocyst of crabs is a staticdynamic sense organ: the hook hairs are position receptors, the thread hairs react to angular displacements about all three main body axes; the group hairs may have no sensory function at all. Rotation sense may be expected to occur in other Crustacea possessing thread hairs or similar receptors in their statocysts as well.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02158510
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  • 5
    Electronic Resource
    Electronic Resource
    Die Augenstielbewegungen der Languste (Palinurus vulgaris) (1955)
    Springer
    Cellular and molecular life sciences 11 (1955), S. 329-330 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Palinurus vulgaris shows clear compensatory eye stalk movements when turning actively around a vertical axis. Exactly the same eye stalk movements are observed after blinding of the animal (measurement of film pictures). On passive rotation only the intact animal shows compensatory eye stalk movements (= optomotoric reactions); in the blinded lobster such movements are lacking, except when a torsion of the body with respect to the legs is effectuated (stimulation of proprioceptors). It is suggested that the compensatory eye stalk movements of the actively turningPalinurus are no “optomotoric reactions”, and possibly no sensory reactions at all; but that they are spontaneous acts originating primarily within the central nervous system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02158405
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  • 6
    Electronic Resource
    Electronic Resource
    Structure and functions of the statocyst in crabs (1956)
    Springer
    Cellular and molecular life sciences 12 (1956), S. 394-396 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung In Fortsetzung früherer Untersuchungen an der Krabbenstatocyste wurden einige weitere Tatsachen festgestellt. Bei erwachsenenCarcinus maenas undMaja verrucosa wurden erstamlig die Statolithen aufgefunden und beschrieben. Sie werden von aussen her aufgenommen. Nur wenige Hakenhaare stehen mit diesen Statolithen in Kontakt (Statolithenhaare). Die Mehrzahl der Hakenhaare steht auf einem eigenen Feld und ist ganz frei beweglich (freie Hakenhaare). An Hand der Augenstielreflexe geblendeter Krabben (Maja) bei Rotation und mittels isolierter Nervendurchschneidungen liess sich zeigen: dass die Statolithenhaare die einzigen Schwererezeptoren sind; dass die Fadenhaare Rotationsrezeptoren sind, die bei Drehung um alle Achsen ansprechen; dass die freien Hakenhaare vermutlich ebenfalls Rotationsrezeptoren sind; dass deren Beteiligung jedoch bloss in einer Veränderung (Hemmung) der durch Fadenhaarreizung ausgelösten Augenstielreflexe zum Ausdruck kommt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157289
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  • 7
    Electronic Resource
    Electronic Resource
    Nystagmus and related phenomena inSepia officinalis (1963)
    Springer
    Cellular and molecular life sciences 19 (1963), S. 29-30 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Intakte Exemplare vonSepia officinalis zeigen nach Drehung um alle drei Hauptachsen Augen- und Kopfbewegungen vom Typus des «Nach-Nystagmus». Diese postrotatorischen Reflexe können nicht optisch ausgelöst sein; sie beweisen vielmehr das Vorhandensein eines echten Rotationssinnes. Es wird angenommen, dass dieser auch hier seinen Sitz in den Statocysten mit ihren hochdifferenzierten Cristae hat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02135341
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  • 8
    Electronic Resource
    Electronic Resource
    Spallanzani und die Fledermäuse (1949)
    Springer
    Cellular and molecular life sciences 5 (1949), S. 90-92 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02153744
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  • 9
    Electronic Resource
    Electronic Resource
    Elektrophysiologische Untersuchungen an der Seitenlinie vonXenopus laevis (1956)
    Springer
    Cellular and molecular life sciences 12 (1956), S. 276-278 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Electrophysiological recording of the spontaneous activity from a single group of lateral sense organs on the abdomen ofXenopus laevis results in a more or less regular series of large spikes, either all of the same height or of two different sizes (each group is innervated by two “large” lateralis fibres). Mechanical stimulation of such a group may cause a rise or a fall of spontaneous impulse frequency. There is evidence for a two-directional sensitivity of the same unit (nerve fibre) from a single group, out of the middle as well as out of the dorsal lateral line.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02157348
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  • 10
    Electronic Resource
    Electronic Resource
    «Spontane» Aktivität des Rückenmarks bei der Elritze (1949)
    Springer
    Cellular and molecular life sciences 5 (1949), S. 291-292 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Blinded spinal minnows (Phoxinus laevis), fixed free from contact, show without any stimulation “spontaneous” body and fin movements. The first slight movements begin 8–10 days after transection of the spinal cord, when the cut is made at the level of the 6th or 7th vertebra or posterior to that region. When it is made near the first vertebra the movements begin within 2–3 days. In the following days or weeks their intensity grows, in most cases until the fishes exhibit quick swimming movements. Periods of swimming (up to 1 minute) alternate irregularly with periods of absolute rest. The origin of the movements is discussed. When the spinal cord is transected at the level of the dorsal fin in a (spinal) minnow that has been operated previously in the anterior region and already shows “spontaneous” swimming, tail movements reappear after 1–2 days. The changes taking place in the spinal cord after transection seem to affect all its parts equally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02149950
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