Pentreath, V.W., Osborne, N.N. & Cottrell, G.A. Anatomy of giant serotonin-containing neurones in the cerebral ganglia of Helix pomatia and Limax maximus . Z.Zellforsch 143, 1–20 (1973). https://doi.org/10.1007/BF00307447

HelixearAnatomy

Zs-Nagy, I., Sakharov, D. A.: The fine structure of the procerebrum of pulmonate molluscs, Helix and Limax. Tissue and Cell 2, 399–411 (1970)

Bullock, T. H., Horridge, G. A.: In: Structure and function in the nervous systems of invertebrates. San Francisco-London: W. H. Freeman & Co 1965

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Whittaker, V. P.: Subcellular localization of neurotransmitters. In: Advances in cytopharmacology (Clementi, F. and Ceccarelli, B., eds.) p. 319–330. New York: Raven Press 1971

Gerschenfeld, H. M.: Observations on the ultrastructure of synapses in some pulmonate molluscs. Z. Zellforsch. 60, 258–275 (1963)

Nolte, A., Breucker, H., Kuhlmann, D.: Cytosomale Einschlüsse und Neurosekret im Nervengewebe von Gastropoden. Z. Zellforsch. 68, 1–27 (1965)

Helixof ear function

Osborne, N. N.: A micro-chromatographic method for the detection of biologically active monoamines in isolated neurons. Experientia (Basel) 27, 1502–1503 (1971)

Cottrell, G. A., Osborne, N. N.: Subcellular localization of serotonin in an identified serotonin-containing neurone. Nature (Lond.) 225, 470–472 (1970)

Pentreath, V. W.: Effect of stimulating a central giant serotonin-containing neurone on peripheral muscles in the snail Helix pomatia. Experientia (Basel) 29, 540–542 (1973)

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Jaim-Etcheverry, G., Zieher, L. M.: Ultrastructural aspects of neurotransmitter storage in adrenergic nerves. In: Advances in cytopharmacology (Clementi, F. and Ceccarelli, B. eds.), p. 343–362. New York: Raven Press 1971

Helixof ear

Osborne, N. N., Cottrell, G. A.: Amine and amino acid microanalysis of two identified snail neurons with known characteristics. Experientia (Basel) 28, 656–658 (1971a)

Mirolli, M., Welsh, J. H.: The effects of reserpine and LSD on molluscs. In: Comparative neurochemistry (Richter, D., ed.), p. 433–443. New York: Pergamon Press 1964

Falck, B., Owman, C.: A detailed methodological description of the fluorescence method for the cellular demonstration of biogenic monoamines. Acta Univ. Lund., Sect. II, No 7, 1–23 (1965)

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Tauc, L., Gerschenfeld, H. M.: Cholinergic transmission mechanisms for both excitation and inhibition in molluscan central synapses. Nature (Lond.) 192, 366–367 (1961)

Bloom, F. E., Costa, E.: The effects of drugs on serotonergic nerve terminals. In: Advances in cytopharmacology. Clementi, F. and Ceccarelli, B., eds., p. 379–396. New York: Raven Press 1971

Amoroso, E. C., Baxter, M. I., Chiquoine, A. D., Nisbet, R. H.: The fine structure of neurons and other elements in the nervous system of the giant African land snail Archachatina marginata. Proc. roy. soc. B 160, 167–180 (1964)

Pentreath, V. W., Cottrell, G. A.: Selective uptake of 5-hydroxytryptamine by axonal processes in Helix pomatia. Nature (Lond.) New Biol., 239, 213–214 (1972)

Osborne, N. N.: The in vivo synthesis of serotonin in an identified serotonin-containing neuron of Helix pomatia. Int. J. Neurosci. 3, 215–228 (1972)

Cottrell, G. A.: Direct postsynaptic responses to stimulation of serotonin-containing neurons. Nature (Lond.) 225, 1060–1062 (1970)

Auricle

Rude, S., Coggeshall, R. E., Orden, L. S. van: Chemical and ultrastructural identification of 5-hydroxytryptamine in an identified neuron. J. Cell Biol. 41, 832–854 (1969)

Coggeshall, R. E.: A light and electron-microscope study of the abdominal ganglion of Aplysia californica. J. Neurophysiol. 30, 1263–1287 (1967)

There is a giant serotonin-containing neurone (GSC) in each cerebral ganglion of Helix pomatia and Limax maximus. In Helix, presynaptic endings of the GSCs are located in the buccal ganglia and peripheral musculature. Dense-cored vesicles of mean diameter 100 nm were observed in the perikarya and the axon branches of the GSCs within the cerebral ganglia. Evidence is presented which suggests that these vesicles sequester serotonin. Vesicles with a similar appearance are present in the presumed presynaptic endings of the GSC in Helix. These endings selectively accumulate tritiated serotonin. Axonal processes containing agranular vesicles (mean diameter 50 nm), or granular vesicles (50–100 nm diameter), or both, make close contact with the fine axon branches of the GSCs within the cerebral ganglion neuropile. Some of these axon processes appear to be presynaptic endings making synaptic connections with the GSCs.

Helixpiercing

Osborne, N. N., Cottrell, G. A.: Transport of amines along the visceral nerve of Helix pomatia. Z. Zellforsch. 109, 171–179 (1970)

Pellegrino de Iraldi, A., Guedet, R., Suburo, A. M.: Differentiation between 5-hydroxytryptamine and catecholamines in synaptic vesicles. Progr. Brain Res. 34, 161–170 (1971)

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Benjamin, P. R., Ings, C. T.,: Golgi-Cox studies on the central nervous system of a gastropod mollusc. Z. Zellforsch. 128, 564–582 (1972)

Cottrell, G. A., Powell, B.: Formation of serotonin by isolated serotonin-containing and by isolated non-amine-containing neurons. J. Neurochem. 18, 1695–1697 (1971)

Helix anatomypiercing

Pentreath, V. W., Cottrell, G. A.: Uptake of serotonin, 5-hydroxytryptophan and tryptophan by giant serotonin-containing neurones and other neurones in the central nervous system of the snail (Helix pomatia). Z. Zellforsch. 1973

Schmekel, L., Wechsler, W.: Elektronenmikroskopische Untersuchungen an Cerebro-Pleural-Ganglien von Nudibranchiern. I. Die Nervenzellen. Z. Zellforsch. 89, 112–132 (1968)

Cottrell, G. A., Osborne, N. N.: Localization and mode of action of cardioexcitatory agents in molluscan hearts. Experientia, (Basel) Suppl. 15, 230–231 (1969)

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Cottrell, G. A.: Synaptic connections made by two serotonin-containing neurons in the snail (Helix pomatia) brain. Experientia (Basel) 27, 813–815 (1971a)

Zs-Nagy, I., Borovyagin, V. L. (1972): Organization of the cytosomal membranes of molluscan neurons under normal and anaerobic conditions as revealed by electron microscopy. Tissue and Cell, 4, 73–84 (1972)

We thank Dr. J.L.S. Cobb for reading the manuscript, J. Stevenson for photographic assistance, and the Medical Research Council for financial aid.

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Tragus

Kandel, E. R., Tauc, L.: Input organisation of two symmetrical giant cells in the snail brain. J. Physiol. (Lond.) 183, 269–280 (1966)

Stretton, A.O.W., Kravitz, E.A.: Neuronal geometry: determination with a technique of intracellular dye injection. Science 162, 132–134 (1968)

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External ear

Pentreath, V. W., Cottrell, G. A.: The blood supply to the central nervous system of Helix pomatia. Z. Zellforsch. 111, 160–178 (1970)

Cottrell, G. A.: Action of imipramine on 5-hydroxytryptamine transmission and on 5-hydroxytryptamine uptake in the snail (Helix pomatia) brain. Brit. J. Pharmacol. 43, 437P (1971c)

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Material: Carbide Shank 1/4". Tool of use: Router. Use For: Wood, Plywood, Particle Board, Laminate, Lumber.

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Caro, L. G., Tubergen, P. P. van, Kolb, J. A.: High-resolution autoradiography. I. Methods. J. Cell Biol. 15, 173–188 (1962)

Cottrell, G. A., Macon, J., Szczepaniak, A. C.: Glutamic acid mimicking of synaptic inhibition on the giant serotonin neurone of the snail. Brit. J. Pharmacol. 45, 684–688 (1972)

Corrodi, H., Hillarp, N.-Å., Jonsson, G.: Fluorescence methods for the histochemical demonstration of monoamines. 3. Sodium borohydride reduction of the fluorescent compounds as a specificity test. J. Histochem. Cytochem. 12, 582–586 (1964)

Gorman, A.L.F., Mirolli, M.: Axonal localization of an excitatory postsynaptic potential in a molluscan neurone. J. exp. Biol. 53, 727–736 (1970)