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Axons are filled with cobalt by diffusion through their cut ends and the cobalt is then precipitated as the black sulphide inside the neurone. It is assumed that neurones with axons in peripheral nerves and somata in central ganglia are either motor or neurosecretory. Fifteen nerves are examined and maps of the location of somata with axons in each nerve are presented. The axon distribution in peripheral nerves of three common inhibitory neurones is described. Dendritic morphology of one common inhibitory neurone and two coxal depressor motoneurones is illustrated. It is proposed that some individual neurones can be reliably identified from their soma dimensions and location within the ganglion. The number of motoneurones with somata in the prothoracic ganglion and their homology with cells in the other thoracic ganglia are discussed.<\/jats:p>","DOI":"10.1098\/rstb.1976.0111","type":"journal-article","created":{"date-parts":[[2006,12,15]],"date-time":"2006-12-15T14:52:39Z","timestamp":1166194359000},"page":"205-219","source":"Crossref","is-referenced-by-count":13,"title":["Organization of motoneurones in the prothoracic ganglion of the cockroach\n                    <i>Periplaneta americana<\/i>\n                    (L.)"],"prefix":"10.1098","volume":"276","author":[{"given":"J. F.","family":"Iles","sequence":"first","affiliation":[{"name":"Beit Memorial Research Fellow, University Laboratory of Physiology, Parks Road, Oxford OX1 3PT"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"175","reference":[{"key":"p_1","doi-asserted-by":"publisher","DOI":"10.1016\/0006-8993(73)90129-7"},{"key":"p_2","doi-asserted-by":"publisher","DOI":"10.1016\/0022-1910(70)90221-0"},{"key":"p_3","unstructured":"Bentley D. R. 1973 Postembryonic development of insect motor systems. In Developmental neurobiology of arthropods (ed. D. Young) pp. 147-177. Cambridge University Press."},{"key":"p_4","first-page":"59","article-title":"Physiological and morphological properties of the metathoracic common inhibitory neuron of the locust. J. comp","volume":"82","author":"Burrows M.","year":"1973","journal-title":"Physiol."},{"key":"p_5","doi-asserted-by":"publisher","DOI":"10.1098\/rstb.1974.0040"},{"key":"p_6","first-page":"1","article-title":"Thoracic muscles of the cockroach Periplaneta americana. Smithson, misc","volume":"107","author":"Carbonell C.","year":"1947","journal-title":"Colins"},{"key":"p_7","doi-asserted-by":"publisher","DOI":"10.1016\/0022-1910(57)90025-2"},{"key":"p_8","unstructured":"Cohen M. J. 1970 A comparison of invertebrate and vertebrate central neurons. In The neurosciences (ed. F. O. Schmitt) vol. 2 pp. 798-812. New York: Rockefeller University Press."},{"key":"p_9","doi-asserted-by":"publisher","DOI":"10.1098\/rstb.1967.0031"},{"key":"p_10","doi-asserted-by":"publisher","DOI":"10.1016\/0300-9629(71)90242-8"},{"key":"p_11","first-page":"213","article-title":"Fibre analysis of the nerves of the second thoracic leg in Periplaneta americana. Proc. 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A.","year":"1911","journal-title":"Neurol."},{"key":"p_19","first-page":"159","article-title":"Dorsal unpaired median insect neurons make neurosecretory endings on skeletal muscle. J. exp","volume":"187","author":"Hoyle G.","year":"1974","journal-title":"Zool."},{"key":"p_20","unstructured":"lies J. F. 1972a Electrophysiological investigations of insect nerve and muscle. D.Phil. Thesis Oxford."},{"key":"p_21","first-page":"647","article-title":"bStructure and synaptic activation of the fast coxal depressor motoneurone of the cockroach Periplaneta americana. J. exp","volume":"56","year":"1972","journal-title":"Biol."},{"key":"p_22","doi-asserted-by":"publisher","DOI":"10.1016\/0006-8993(71)90089-8"},{"key":"p_23","first-page":"151","article-title":"Coxal depressor muscles of the cockroach and the role of peripheral inhibition. J. exp","volume":"55","author":"Pearson K. 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