Blar i Bergen Open Research Archive på forfatter "Helm, Conrad"
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The development of early pioneer neurons in the annelid Malacoceros fuliginosus
Hausen, Harald; Kumar, Suman; Tumu, Sharat Chandra; Helm, Conrad (Journal article; Peer reviewed, 2020)Background Nervous system development is an interplay of many processes: the formation of individual neurons, which depends on whole-body and local patterning processes, and the coordinated growth of neurites and synapse ... -
Early evolution of radial glial cells in Bilateria
Helm, Conrad; Karl, Anett; Beckers, Patrick; Kaul-Strehlow, Sabrina; Ulbricht, Elke; Kourtesis, Ioannis; Kuhrt, Heidrun; Hausen, Harald; Bartolomaeus, Thomas; Reichenbach, Andreas; Bleidorn, Christoph (Journal article; Peer reviewed, 2017)Bilaterians usually possess a central nervous system, composed of neurons and supportive cells called glial cells. Whereas neuronal cells are highly comparable in all these animals, glial cells apparently differ, and in ... -
Morphological investigations of posttraumatic regeneration in Timarete cf. punctata (Annelida: Cirratulidae)
Weidhase, Michael; Helm, Conrad; Bleidorn, Christoph (Journal article; Peer reviewed, 2015-08-06)Introduction: Annelids exhibit great regenerative abilities, which are mainly used after injury or during reproduction. These lophotrochozoans thus represent excellent models for regeneration research. However, detailed ... -
New insights into the morphology and evolution of the ventral pharynx and jaws in Histriobdellidae (Eunicida, Annelida)
Tzetlin, Alexander; Budaeva, Nataliya; Vortsepneva, Elena; Helm, Conrad (Journal article; Peer reviewed, 2020-11-19)The jaw apparatus in several annelid families represents a powerful tool for systematic approaches and evolutionary investigations. Nevertheless, for several taxa, this character complex has scarcely been investigated, and ... -
Owenia fusiformis – a basally branching annelid suitable for studying ancestral features of annelid neural development
Helm, Conrad; Vöcking, Oliver; Kourtesis, Ioannis; Hausen, Harald (Journal article; Peer reviewed, 2016-06-16)Background Comparative investigations on bilaterian neurogenesis shed light on conserved developmental mechanisms across taxa. With respect to annelids, most studies focus on taxa deeply nested within the annelid tree, ...