Abstract
Several classes of nerve cells have been characterized in the lamprey nervous system including six classes of spinal interneurons. Two of these, giant interneurons and edge cells, have sensory-related functions (Rovainen, 1967; Grillner, Williams, and Lagerback, 1984) and three classes have direct actions on motoneurons: lateral interneurons (Rovainen, 74a), excitatory CC interneurons, and inhibitory CC interneurons (contralaterally and caudally projecting interneurons, Buchanan, 1982). In addition, spinal 5-hydroxytryptamine-containing cells may also have synaptic interactions with motoneurons (van Dongen, Hökfelt, and Grillner, 1985). This article will review the morphologies, synaptic interactions, and activities during fictive swimming of these premotor interneurons and will discuss their possible roles in locomotion.
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© 1986 The Wenner-Gren Center
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Buchanan, J.T. (1986). Premotor Interneurons in the Lamprey Spinal Cord: Morphology, Synaptic Interactions and Activities during Fictive Swimming. In: Grillner, S., Stein, P.S.G., Stuart, D.G., Forssberg, H., Herman, R.M. (eds) Neurobiology of Vertebrate Locomotion. Wenner-Gren Center International Symposium Series. Palgrave Macmillan, London. https://doi.org/10.1007/978-1-349-09148-5_21
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DOI: https://doi.org/10.1007/978-1-349-09148-5_21
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