Summary
Receptor cell axons from the antennal flagellum terminate in the glomeruli of the ipsilateral deutocerebrum in Periplaneta americana and Locusta migratoria. Processes from several groups of deutocerebral neurons also enter the glomeruli and terminate in characteristic branching patterns. There, they contact the antennal axons. Connections are both convergent and divergent. Not only do single central neurons collect the inputs from many receptor cells, but receptor axons were often observed to branch and terminate at more than one deutocerebral neuron. The axons from a portion of the neurons go to form the deutocerebral bundle of the tractus olfactorioglobularis. These axons of the bundle terminate in the ipsilateral calyx of the corpus pedunculatum and in the lateral lobus protocerebri. The processes of the majority of the deutocerebral neurons stay within the deutocerebrum itself and may serve as local interneurons. Part of some antennal fibers terminate in the lobus dorsalis. The lobus glomeratus receives inputs from the maxillary palps and also from processes of deutocerebral neurons.
Electron microscopy of synaptic connections and anatomical experiments reveal a complicated pattern of connections between receptor axons and higher order neurons as well as between higher order neurons themselves within the glomeruli.
The ratio of the number of antennal fibers to that of relay fibers could easily lead to the interpretation, that the deutocerebrum merely serves as a device for reducing the number of transmission channels. However, coupled with physiological data, anatomical details such as conand divergence of input and interconnections between input channels suggest rather a filtering system and a highly complicated integrative network.
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References
Akert, K., Steiger, U.: Über Glomeruli im Zentralnervensystem von Vertebraten und Invertebraten. Schweiz. Arch. Neurol. Psychiat. 100, 321–337 (1967)
Andres, K.H.: Über die Feinstruktur der Rezeptoren an Sinneshaaren. Z. Zellforsch. 75, 339–365 (1966)
Blaney, W.M.: Electrophysiological responses of the terminal sensilla on the maxillary palps of Locusta migratoria (L.) to some electrolytes and non electrolytes. J. exp. Biol. 60, 275–293 (1974)
Boeckh, J.: Die Reaktionen olfaktorischer Neurone im Deutocerebrum von Insekten im Vergleich zu den Antwortmustern der Geruchssinneszellen. J. comp. Physiol. 90, 183–205 (1974a)
Boeckh, J., Ernst, K.D., Sass, H., Waldow, U.: Coding of odor quality in the insect olfactory pathway. Olfaction and taste, Vol. V, pp. 239–245 (D. Denton, ed.). New York: Academic Press 1975
Boeckh, J., Sandri, C., Akert, K.: Sensorische Eingänge und synaptische Verbindungen im Zentralnervensystem von Insekten — Experimentelle Degeneration in der antennalen Sinnesbahn im Oberschlundganglion von Fliegen und Schaben. Z. Zellforsch. 103, 429–446 (1970)
Braitenberg, V., Strausfeld, N.J.: Principles of the mosaic organisation in the visual systems neuropil of Musca domestica L. In: Handbook of sensory physiology, Vol. VII/3A: Central processing of visual information (R. Jung, ed.). Berlin-Heidelberg-New York: Springer 1973
Bretschneider, F.: Über die Gehirne der Küchenschabe und des Mehlkäfers. Jena. Z. Naturw. 52, 269–362 (1914)
Cajal, S.R.: Histologie du système nerveux de l'homme et des vertébrés. Paris: Maloine 1911
Colonnier, M.: The tangential organization of the visual cortex. J. Anat. (Lond.) 98, 327–344 (1964)
Geisert, B., Altner, H.: Analysis of the sensory projection from the tarsal sensilla of the blowfly (Phormia terranovae Rob.-Desv., Diptera). Experimental degeneration of primary fibres. Cell Tiss. Res. 150, 249–259 (1974)
Goll, W.: Strukturuntersuchungen am Gehirn von Formica. Z. Morph. Ökol. Tiere 59, 143–210 (1967)
Hanström, B.: Vergleichende Anatomie des Nervensystems der wirbellosen Tiere unter Berücksichtigung seiner Funktion. Berlin: Springer 1928. Nachdruck, Amsterdam: A. Asher & Co. 1968
Jawlowski, H.: Über die Struktur des Gehirns bei Saltatoria. Ann. Univ. M. Curie-Sklodowska, Lublin 8C, 403–434 (1954)
Kenyon, F.C.: The brain of the bee. J. comp. Neurol. 6, 133–209 (1898)
Lamparter, H.E., Akert, K., Sandri, C.: Wallersche Degeneration im Zentralnervensystem der Ameise. Elektronenmikroskopische Untersuchungen am Prothorakalganglion von Formica lugubris. Zett. Schweiz. Arch. Neurol. Psychiat. 100, 337–354 (1967)
Masson, C.: Contribution a l'étude du système antennaire chez les fourmis. Thesis Fac. Sci. Nat. Univ. Provence. Marseille (1973)
Masson, C.: Repartition des glomérules sensoriels dans le lobe antennaire du cerveau de la fourmi Camponotus vagus Scop, approche morphologique, cytochimique et electrophysiologique. 1st ECRO Congr. Univ. Paris Sud Orsay (1974)
Menzel, R., Erber, J., Masuhr, T.: Learning and memory in the honeybee. Experimental analysis of insect behaviour, (L. Barton, Browne, ed.), pp. 195–217. Berlin-Heidelberg-New York: Springer 1974
Pareto, A.: Die zentrale Verteilung der Fühlerafferenz bei Arbeiterinnen der Honigbienen, Apis mellifera L. Z. Zellforsch. 131, 109–140 (1972)
Pfenninger, K., Sandri, C., Akert, K., Eugster, C.H.: Contribution to the problem of structural organization of the presynaptic area. Brain Res. 12, 10–18 (1969)
Pinching, A.J., Powell, T.P.S.: The neuron types in the glomerular layer of the olfactory bulb. J. Cell Sci. 9, 305–345 (1971a)
Pinching, A.J., Powell, T.P.S.: The neuropil of the glomeruli of the olfactory bulb. J. Cell Sci. 9, 347–377 (1971b)
Pinching, A.J., Powell, T.P.S.: The termination of centrifugal fibres in the glomerular layer of the olfactory bulb. J. Cell. Sci. 10, 621–635 (1972b)
Pinching, A.J., Powell, T.P.S.: Experimental studies of the axons intrinsic to the glomerular layer of the olfactory bulb. J. Cell Sci. 10, 637–655 (1972c)
Ramón-Moliner, E.: The Golgi technique. Contemporary research methods in neuroanatomy (W.J.H. Nauta S.O.E., Ebbeson, eds.), pp. 32–55. Berlin-Heidelberg-New York: Springer 1970
Richardson, K.C., Jarett, I., Finke, E.H.: Embedding in epoxy resins for ultrathin sectioning in electron microscopy. Stain Technol. 35, 313–323 (1960)
Sabatini, D.S., Bensch, K., Barrnett, R.J.: New fixative for cytological and cytochemical studies. 5. Intern. Congr. for Electron Microscopy (S.S. Breese, ed.), pp. L3-L4. Bd.2. Philadelphia: Academic Press 1962
Satija, R.C.: A histological and experimental study of nervous pathways in the brain and thoracic nerve cord of Locusta migratoria migratorioides (R. + F.). Res. Bull. Panjab Univ. 9, 13–32 (1958)
Shepherd, G.M.: Synaptic organization of the mammalian olfactory bulb. Physiol. Rev. 52, No. 4, 864–917 (1972)
Spurr, A.A.: A low-viscosity epoxy resin embedding medium for electron microscopy. J. Ultrastruct. Res. 26, 31–43 (1969)
Steiger, U.: Über den Feinbau des Neuropils im Corpus pedunculatum der Waldameise. Z. Zellforsch. 81, 511–536 (1967)
Szentágothai, J.: Glomerular synapses, complex synaptic arrangements, and their operational significance. The neurosciences, second study program (F.O. Schmitt, ed.), pp. 427–443. New York: Rockefeller University Press 1970
Waldow, U.: Multimodale Neurone im Deutocerebrum von Periplaneta americana. J. comp. Physiol. 101, 329–341 (1975)
Weiss, M.J.: Neuronal connections and the function of the corpora pedunculata in the brain of the American cockroach, Periplaneta americana (L.). J. Morph. 142, 21–70 (1974)
Yamada, M.: A research for odour encoding in the olfactory lobe. J. Physiol. (Lond.) 214, 127–143 (1971)
Ziesmer, C.: Modifizierte Methode zur Silberimprägnierung. Z. wiss. Mikr. 60, 55–77 (1951)
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Ernst, K.D., Boeckh, J. & Boeckh, V. A neuroanatomical study on the organization of the central antennal pathways in insects. Cell Tissue Res. 176, 285–308 (1977). https://doi.org/10.1007/BF00221789
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DOI: https://doi.org/10.1007/BF00221789