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J Neurocytol

Title:		Morphological and electrophysiological examination of olfactory sensory neurons during the early developmental prolarval stage of the sea lamprey Petromyzon marinus L
Author(s):		Zielinski BS; Fredricks K; McDonald R; Zaidi AU;
Address:		"Department of Biological Sciences, University of Windsor, Windsor, Ontario, Canada, N9B 3P4. Zielin1@uwindsor.ca"
Journal Title:		J Neurocytol
Year:		2005
Volume:		20060713
Issue:		3-May
Page Number:		209 - 216
DOI:		10.1007/s11068-005-8354-0
ISSN/ISBN:		0300-4864 (Print) 0300-4864 (Linking)
Abstract:		"This study examined olfactory sensory neuron morphology and physiological responsiveness in newly hatched sea lamprey, Petromyzon marinus L. These prolarvae hatch shortly after neural tube formation, and stay within nests for approximately 18 days, before moving downstream to silty areas where they burrow, feed and pass to the larval stage. To explore the possibility that the olfactory system is functioning during this prolarval stage, morphological and physiological development of olfactory sensory neurons was examined. The nasal cavity contained an olfactory epithelium with ciliated olfactory sensory neurons. Axons formed aggregates in the basal portion of the olfactory epithelium and spanned the narrow distance between the olfactory epithelium and the brain. The presence of asymmetric synapses with agranular vesicles within fibers in the brain, adjacent to the olfactory epithelium suggests that there was synaptic connectivity between olfactory sensory axons and the brain. Neural recordings from the surface of the olfactory epithelium showed responses following the application of L-arginine, taurocholic acid, petromyzonol sulfate (a lamprey migratory pheromone), and water conditioned by conspecifics. These results suggest that lampreys may respond to olfactory sensory input during the prolarval stage"
Keywords:		"Animals Arginine/pharmacology Cholagogues and Choleretics/pharmacology Cholic Acids/pharmacology Electrophysiology Embryo, Nonmammalian/physiology Female Membrane Potentials/drug effects/physiology Microscopy, Electron, Scanning Microscopy, Electron, Tran;"
Notes:		"MedlineZielinski, Barbara S Fredricks, Kim McDonald, Rod Zaidi, Aliya U eng Research Support, Non-U.S. Gov't 2006/07/15 J Neurocytol. 2005 Sep; 34(3-5):209-16. doi: 10.1007/s11068-005-8354-0. Epub 2006 Jul 13"