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dc.contributor.authorHolland, Nicholas
dc.contributor.authorSomorjai, Ildiko Maureen Lara
dc.date.accessioned2021-05-03T23:41:12Z
dc.date.available2021-05-03T23:41:12Z
dc.date.issued2020-10-15
dc.identifier.citationHolland , N & Somorjai , I M L 2020 , ' The sensory peripheral nervous system in the tail of a cephalochordate studied by serial blockface scanning electron microscopy (SBSEM) ' , The Journal of Comparative Neurology , vol. 528 , no. 15 , pp. 2569-2582 . https://doi.org/10.1002/cne.24913en
dc.identifier.issn0021-9967
dc.identifier.otherPURE: 266845140
dc.identifier.otherPURE UUID: 46c68ee8-3ce7-435c-a16a-9cbda4265ffa
dc.identifier.otherORCID: /0000-0001-5243-6664/work/73701374
dc.identifier.otherScopus: 85085135759
dc.identifier.otherWOS: 000530456100001
dc.identifier.urihttps://hdl.handle.net/10023/23111
dc.description.abstractSerial blockface scanning electron microscopy (SBSEM) is used to describe the sensory peripheral nervous system (PNS) in the tail of a cephalochordate, Asymmetron lucayanum. The reconstructed region extends from the tail tip to the origin of the most posterior peripheral nerves from the dorsal nerve cord. As peripheral nerves ramify within the dermis, all the nuclei along their course belong to glial cells. Invaginations in the glial cell cytoplasm house the neurites, an association reminiscent of the nonmyelinated Schwann cells of vertebrates. Peripheral nerves pass from the dermis to the epidermis via small fenestrae in the sub‐epidermal collagen fibril layer; most nerves exit abruptly, but a few run obliquely within the collagen fibril layer for many micrometers before exiting. Within the epidermis, each nerve begins ramifying repeatedly, but the branches are too small to be followed to their tips with SBSEM at low magnification (previous studies on other cephalochordates indicate that the branches end freely or in association with epidermal sensory cells). In Asymmetron, two morphological kinds of sensory cells are scattered in the epidermis, usually singly, but sometimes in pairs, evidently the recent progeny of a single precursor cell. The discussion considers the evolution of the sensory PNS in the phylum Chordata. In cephalochordates, Retzius bipolar neurons with intramedullary perikarya likely correspond to the Rohon‐Beard cells of vertebrates. However, extramedullary neurons originating from ventral epidermis in cephalochordates (and presumably in ancestral chordates) contrast with vertebrate sensory neurons, which arise from placodes and neural crest.
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofThe Journal of Comparative Neurologyen
dc.rightsCopyright © 2020 Wiley Periodicals, Inc. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/cne.24913en
dc.subjectAmphioxusen
dc.subjectCephalochordataen
dc.subjectGliaen
dc.subjectLanceleten
dc.subjectPeripheral nervous systemen
dc.subjectSBSEMen
dc.subjectQH301 Biologyen
dc.subjectRC0321 Neuroscience. Biological psychiatry. Neuropsychiatryen
dc.subjectNDASen
dc.subject.lccQH301en
dc.subject.lccRC0321en
dc.titleThe sensory peripheral nervous system in the tail of a cephalochordate studied by serial blockface scanning electron microscopy (SBSEM)en
dc.typeJournal articleen
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews. School of Biologyen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. Biomedical Sciences Research Complexen
dc.contributor.institutionUniversity of St Andrews. Marine Alliance for Science & Technology Scotlanden
dc.identifier.doihttps://doi.org/10.1002/cne.24913
dc.description.statusPeer revieweden
dc.date.embargoedUntil2021-05-04


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