Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing

Odor perception depends on the odorant-evoked changes on Mitral/Tufted cell firing pattern within the olfactory bulb (OB). The OB exhibits a significant "ongoing" or spontaneous activity in the absence of sensory stimulation. We characterized this ongoing activity by simultaneously recordi...

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Autores principales:	AYLWIN,MARÍA DE LA LUZ, DÍAZ,EUGENIA, MALDONADO,PEDRO E
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2005
Materias:	Coding tetrodes spikes ongoing activity synchrony
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100003
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spelling	oai:scielo:S0716-976020050001000032005-07-06Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal BreathingAYLWIN,MARÍA DE LA LUZDÍAZ,EUGENIAMALDONADO,PEDRO E Coding tetrodes spikes ongoing activity synchrony Odor perception depends on the odorant-evoked changes on Mitral/Tufted cell firing pattern within the olfactory bulb (OB). The OB exhibits a significant "ongoing" or spontaneous activity in the absence of sensory stimulation. We characterized this ongoing activity by simultaneously recording several single neurons in the mitral cell layer (MCL) of anesthetized rats and determined the extent of synchrony and oscillations under nasal and tracheal breathing. We recorded 115 neurons and found no significant differences in the mean firing rates between both breathing conditions. Surprisingly, nearly all single units exhibited a long refractory period averaging 14.4 ms during nasal respiration that was not different under tracheal breathing. We found a small incidence (2% of neurons) of gamma band oscillations and a low incidence (8.1%) of correlated firing between adjacent MCL cells. During nasal respiration, a significant oscillation at the respiratory rate was observed in 12% of cells that disappeared during tracheal breathing. Thus, in the absence of odorants, MCL cells exhibit a long refractory period, probably reflecting the intrinsic OB network properties. Furthermore, in the absence of sensory stimulation, MCL cell discharge does not oscillate in the gamma band and the respiratory cycle can modulate the firing of these cellsinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.38 n.1 20052005-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100003en10.4067/S0716-97602005000100003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Coding tetrodes spikes ongoing activity synchrony
spellingShingle	Coding tetrodes spikes ongoing activity synchrony AYLWIN,MARÍA DE LA LUZ DÍAZ,EUGENIA MALDONADO,PEDRO E Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
description	Odor perception depends on the odorant-evoked changes on Mitral/Tufted cell firing pattern within the olfactory bulb (OB). The OB exhibits a significant "ongoing" or spontaneous activity in the absence of sensory stimulation. We characterized this ongoing activity by simultaneously recording several single neurons in the mitral cell layer (MCL) of anesthetized rats and determined the extent of synchrony and oscillations under nasal and tracheal breathing. We recorded 115 neurons and found no significant differences in the mean firing rates between both breathing conditions. Surprisingly, nearly all single units exhibited a long refractory period averaging 14.4 ms during nasal respiration that was not different under tracheal breathing. We found a small incidence (2% of neurons) of gamma band oscillations and a low incidence (8.1%) of correlated firing between adjacent MCL cells. During nasal respiration, a significant oscillation at the respiratory rate was observed in 12% of cells that disappeared during tracheal breathing. Thus, in the absence of odorants, MCL cells exhibit a long refractory period, probably reflecting the intrinsic OB network properties. Furthermore, in the absence of sensory stimulation, MCL cell discharge does not oscillate in the gamma band and the respiratory cycle can modulate the firing of these cells
author	AYLWIN,MARÍA DE LA LUZ DÍAZ,EUGENIA MALDONADO,PEDRO E
author_facet	AYLWIN,MARÍA DE LA LUZ DÍAZ,EUGENIA MALDONADO,PEDRO E
author_sort	AYLWIN,MARÍA DE LA LUZ
title	Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
title_short	Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
title_full	Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
title_fullStr	Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
title_full_unstemmed	Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing
title_sort	simultaneous single unit recording in the mitral cell layer of the rat olfactory bulb under nasal and tracheal breathing
publisher	Sociedad de Biología de Chile
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100003
work_keys_str_mv	AT aylwinmariadelaluz simultaneoussingleunitrecordinginthemitralcelllayeroftheratolfactorybulbundernasalandtrachealbreathing AT diazeugenia simultaneoussingleunitrecordinginthemitralcelllayeroftheratolfactorybulbundernasalandtrachealbreathing AT maldonadopedroe simultaneoussingleunitrecordinginthemitralcelllayeroftheratolfactorybulbundernasalandtrachealbreathing
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Simultaneous Single Unit Recording in the Mitral Cell Layer of the Rat Olfactory Bulb under Nasal and Tracheal Breathing

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