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  • 1
    Electronic Resource
    Electronic Resource
    Fine structure of a mandibular stretch receptor in Thrips physapus L. (Thysanoptera, Insecta) (1982)
    Springer
    Zoomorphology 101 (1982), S. 177-186 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Only one non-ciliary proprioceptor is developed on the mandible of Thrips. It consists of two bipolar, multiterminal sense cells, the dendrites of which form a strand extended between the tentorium and the back mandibular margin. The dendritic terminals are embedded in an electron-dense, homogeneous matrix, which obviously represents the stimulus transmitting structure. The strand is stretched, if the mandible is moved forwards and upwards. In Thrips, the system of proprioceptors monitoring the mandibular movement is reduced extensively compared with other pterygote insects. This is linked up with the far-reaching reduction of the mobility of the mandible itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312432
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  • 2
    Electronic Resource
    Electronic Resource
    Feinstruktur eines maxillaren Muskelrezeptors bei Oncopeltus fasciatus (Insecta, Heteroptera) (1987)
    Springer
    Zoomorphology 106 (1987), S. 339-345 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Im Kopf von Oncopeltus fasciatus wird erstmals für Insekten ein maxillarer nicht-ciliärer Muskelrezeptor in seiner Feinstruktur beschrieben. Er ist zwischen dem Hypopharynx-Flügel und dem Maxillen-Hebel aufgespannt und wird dementsprechend bei der Protraktion der Maxille gedehnt. Der reizübermittelnde Teil ist zusammengesetzt aus zwei caudal gelegenen, sehr dünnen Muskelfasern und einem Bindegewebs-Strang im vorderen Drittel. Die beiden Fasern des Rezeptor-Muskels bilden in ihrem vorderen Bereich eine Röhre. Die motorische Innervierung der Fasern geschieht vom Lumen der Röhre her. Fünf Sinneszellen senden ihre Dendriten zum Bindegewebs-Strang, wo sie zwischen den Fibrillen enden. Der beschriebene Maxillen-Rezeptor ist möglicherweise serial-homolog dem dorsalen Mandibel-Rezeptor anderer Insekten.
    Notes: Summary The fine structure of a non-ciliary muscle receptor in the maxilla of Oncopeltus fasciatus is described. The receptor extends anteriorly from its origin at the hypopharyngeal wing to its insertion at the maxillary lever. Accordingly it is stretched during protraction of the maxilla. The stimulus-transmitting part consists of two very thin, caudally situated muscle fibres and a connective tissue strand situated in the cranial third. The receptor muscle fibres form a tube in their cranial part. They are innervated by a motor axon lying in the lumen of the tube. Five sensory cells send their dendrites to the connective tissue strand, where they end among the filaments. The maxillary receptor described here is possibly an organ serially homologous to the dorsal mandibular muscle receptor of other insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312256
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  • 3
    Electronic Resource
    Electronic Resource
    Feinstruktur eines Muskelrezeptors im Kopf vonDermestes maculatus De Geer (Insecta, Coleoptera) (1976)
    Springer
    Zoomorphology 85 (1976), S. 59-71 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Im Kopf vonDermestes maculatus wird eine Struktur beschrieben, die wahrscheinlich als Muskelrezeptor die Bewegung der Mandibel kontrolliert: Etwa 10 multipolare Neurone senden Dendriten ohne ciliÄre Strukturen in das Innere des sehr dünnen dritten Mandibelmuskels, Musculus tentorio-mandibularis, wo sie sich periodisch jeweils im Niveau der Z-Scheiben verzweigen. Die Möglichkeit wird erwogen, da\ die Änderung im lonenmilieu bei der Kontraktion des Muskels als Reiz perzipiert wird.
    Notes: Summary A structure is described in the head ofDermestes maculatus, which probably controls the motion of the mandible as a muscle receptor: About 10 multipolar neurons send dendritic processes without any ciliary structure into the interior of the third mandibular muscle, musculus tentorio-mandibularis, where they periodically ramify in the levels of the Z-bands. The possibility is being discussed, that the dendritic terminations detect muscular activity by detecting the ionic changes associated with contraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00996065
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  • 4
    Electronic Resource
    Electronic Resource
    Ultrastructure of a muscle spindle-analogous receptor organ in the mandible of Oncopeltus fasciatus (Insecta, Heteroptera) with remarks on the homology of the mandibular muscles (1985)
    Springer
    Zoomorphology 105 (1985), S. 388-394 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A non-ciliary muscle receptor organ in the first mandibular retractor muscle of Oncopeltus fasciatus is described. The organ consists of two specialized muscle fibres of the first retractor, which are embedded in a thickened layer of connective tissue. The sensory innervation is supplied by three multiterminal sense cells sending several dendrites to the receptor muscle fibres. ‘Naked’ dendritic terminals are attached to the muscle surface or connective tissue fibrils. The far-reaching analogy of the receptor to the intrafusal chain-fibres of vertebrate muscle spindles is remarkable. The existence of a muscle receptor organ in the first mandibular retractor may serve as an argument in favor of the homology of this muscle with the musculus tentorio-mandibularis of orthopteroid insects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312283
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  • 5
    Electronic Resource
    Electronic Resource
    Feinstruktur zweier Propriorezeptoren im Kopf vonOryzaephilus surinamensis (L.) (Insecta, Coleoptera) (1978)
    Springer
    Zoomorphology 90 (1978), S. 213-226 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Im Kopf vonOryzaephilus werden zwei Propriorezeptoren beschrieben, deren Sinneszellen keine ciliären Strukturen aufweisen. Es ist zu vermuten, daß beide die Bewegung und Stellung der Mandibel messen: 1. Der ventrale Muskelrezeptor der Mandibel besteht aus einer Muskelfaser und 8 multipolaren Sinneszellen, deren Perikaryen in der Nähe des Muskelursprungs liegen. Die Muskelfaser verläuft vom vorderen Tentorium-Arm zur ventralen Basis der Mandibel. Die Dendriten der Sinneszellen ziehen zum Teil ins Innere des Muskels, verzweigen sich dort weiter und enden in der Nähe der Z-Scheiben. Ein anderer Teil der Dendriten bildet einen kompakten Strang entlang der Ventralseite des Muskels. 2. Drei weitere Sinneszellen bilden den Mandibelsehnen-Rezeptor. Ihre Perikaryen liegen bei denen der 8 Sinneszellen, die zum ventralen Muskelrezeptor gehören, und werden gemeinsam mit ihnen umhüllt. Ihre Dendriten werden, eingebettet in Hüllzellausläufer, zwischen dem vorderen Tentorium-Arm und der Sehne des Musculus adductor mandibulae aufgespannt. Möglicherweise perzipiert dieser Rezeptor die Adduktion der Mandibel.
    Notes: Summary Two proprioceptors without ciliary structures are described in the head ofOryzaephilus. Both possibly measure the movement and position of the mandible. 1. The ventral muscle receptor of the mandible consists of a muscle fibre and 8 multipolar sensory cells, the perikaryons of which lie near the muscle origin. The muscle fibre runs from the anterior tentorium arm to the ventral basis of the mandible. The sensory cells send a part of their dendrites into the interior of the muscle, where they ramify and end near the Z-bands. Another part of the dendrites forms a compact cord along the ventral side of the muscle. 2. Three other sensory cells form the mandibular tendon receptor. Their perikaryons lie near those of the other eight, and are sheathed together with them. Their dendrites are stretched between anterior tentorium arm and tendon of mandibular adductor muscle, sheathed with glia cell processes. This receptor possibly percepts the adduction of the mandible.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01007692
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  • 6
    Electronic Resource
    Electronic Resource
    Zwei Muskelrezeptoren an der Mandibel von Leuctra (Insecta, Plecoptera) — Beispiele für nicht-ciliäre Sinnesorgane mit Tubularkörper-ähnlichen Strukturen (1984)
    Springer
    Zoomorphology 104 (1984), S. 239-245 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Beide Muskelrezeptoren an der Mandibel von Leuctra ziehen vom vorderen Tentorium-Arm zur Mandibel-Basis. Der ventrale Rezeptor besteht aus zwei dünnen Muskelfasern (6 bis 7 μm Durchmesser) und mindestens 10 multiterminalen Sinneszellen, deren Dendriten sich im Innern der Fasern verzweigen und an den Z-Scheiben enden. Der dorsale Rezeptor besitzt drei ähnlich dünne Muskelfasern, aber nur eine einzelne multiterminale Sinneszelle. Ihre Dendriten enden im Ansatzgebiet des Muskels, zwischen Muskelfasern und Epidermiszellen. Beide Rezeptoren haben im wesentlichen denselben Feinbau wie bei Coleopteren, jedoch treten — besonders beim dorsalen Rezeptor — in den Dendriten-Enden Strukturen auf, die den Tubularkörpern bei Mechanosensillen ähneln.
    Notes: Summary The muscle receptor organs of the mandible of Leuctra extend between the anterior tentorial arm and the mandible base. The ventral receptor is composed of two thin muscle fibres (6–7 μm in diameter) and at least ten multiterminal sensory cells, the dendrites of which branch in the interior of the fibres and end near the z-bands. The dorsal receptor organ consists of three muscle fibres of similar diameter and only one multiterminal sensory cell. The dendritic ends lie at the distal end of the muscle, where muscle fibres and epidermal cells make contact. Both receptor organs essentially show the same ultrastructural characteristics as in Coleoptera. However, the dorsal receptor organ in particular possesses organelles in its dendritic ends, which look like the tubular bodies in ciliary mechanoreceptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00312037
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