{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T07:32:05Z","timestamp":1790753525386,"version":"4.1.0"},"reference-count":44,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2004,10,9]],"date-time":"2004-10-09T00:00:00Z","timestamp":1097280000000},"content-version":"vor","delay-in-days":6957,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Comparative Neurology"],"published-print":{"date-parts":[[1985,9,22]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The histological organization of the filum terminale of the spinal cord in <jats:italic>Rana catesbeiana<\/jats:italic> and <jats:italic>Rana pipiens<\/jats:italic> was characterized to determine if this region possessed an organized neuropil or whether it was merely a glial remnant that persisted after absorption of the larval tail.<\/jats:p><jats:p>The excised filum was maintained in vitro. Intracellular electrophysiological recording was performed with horseradish peroxidase injection. Tyrosine hydroxylase and serotonin distribution were revealed by immunocytochemical methods.<\/jats:p><jats:p>Astroglia were the dominant cell type and displayed an elaborate variety of forms. The mean membrane potential was logarithmically related to the extracellular potassium concentration but displayed a sub\u2010Nernstian slope. Oligodendroglia were also seen, as well as ependyma that extended from the central canal to the pial surface.<\/jats:p><jats:p>Neuronal activity was revealed by occasional intracellular penetration of elements that displayed spontaneous excitatory postsynaptic or action potentials. The major evidence for the presence of neurons was the demonstration of tyrosine hydroxylase (TH) immunoreactivity in a large population of cerebrospinal fluid\u2010contacting neurons that abutted the ventral half of the central canal. The axons of these cells entered a ventral bundle and ascended the cord; some fibers left this tract and apparently terminated on large arcuate neurons within the filum. Serotoninergic fibers were primarily confined to a subpial location at the dorsal midline.<\/jats:p><jats:p>We conclude that the filum terminale of the frog has a sparse but functional neuropil that is organized around the central canal and supported by a profusion of elaborate glial forms.<\/jats:p>","DOI":"10.1002\/cne.902390409","type":"journal-article","created":{"date-parts":[[2005,5,27]],"date-time":"2005-05-27T20:48:02Z","timestamp":1117226882000},"page":"431-444","source":"Crossref","is-referenced-by-count":23,"title":["Organization of the filum terminale in the frog"],"prefix":"10.1002","volume":"239","author":[{"given":"Mitchell","family":"Chesler","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Charles","family":"Nicholson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2004,10,9]]},"reference":[{"key":"e_1_2_1_2_1","first-page":"182","volume-title":"The Comparative Anatomy of the Nervous System of Vertebrates including Man","author":"Ariens Kappers C. 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