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Article: Expiratory neural activities in gasping induced by pharyngeal stimulation and hypoxia

TitleExpiratory neural activities in gasping induced by pharyngeal stimulation and hypoxia
Authors
Issue Date1995
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/resphysiol
Citation
Respiration Physiology, 1995, v. 100 n. 2, p. 119-127 How to Cite?
AbstractThe purpose was to characterize expiratory neural activities in gasping elicited during the aspiration reflex (AR) in hyperoxia and during hypoxia-induced gasping. In decerebrate, vagotomized and paralyzed cats, we recorded activities of inspiratory and expiratory cranial and spinal nerves. The AR was elicited by touching the epipharyngeal mucosa. In eupnea, spinal expiratory activities were greatly decreased during AR whereas laryngeal expiratory activities were increased. In hypoxia-induced gasping, both the laryngeal and spinal expiratory activities were reduced. All of the inspiratory activities were increased during both gasping and the AR. In addition, neural activities were below control levels following AR; activities gradually recovered to control levels. We conclude that spinal expiratory activities are inhibited during the AR and gasping. Results are consistent with the concept that medullary mechanisms for gasping are recruited by mechanical stimulation of the epipharynx. In hypoxia-induced gasping, the hypoxia, per se, causes a separate suppression of laryngeal expiratory activities.
Persistent Identifierhttp://hdl.handle.net/10722/171615
ISSN
2001 Impact Factor: 2.197
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorFung, MLen_US
dc.contributor.authorSt John, WMen_US
dc.date.accessioned2012-10-30T06:15:58Z-
dc.date.available2012-10-30T06:15:58Z-
dc.date.issued1995en_US
dc.identifier.citationRespiration Physiology, 1995, v. 100 n. 2, p. 119-127en_US
dc.identifier.issn0034-5687en_US
dc.identifier.urihttp://hdl.handle.net/10722/171615-
dc.description.abstractThe purpose was to characterize expiratory neural activities in gasping elicited during the aspiration reflex (AR) in hyperoxia and during hypoxia-induced gasping. In decerebrate, vagotomized and paralyzed cats, we recorded activities of inspiratory and expiratory cranial and spinal nerves. The AR was elicited by touching the epipharyngeal mucosa. In eupnea, spinal expiratory activities were greatly decreased during AR whereas laryngeal expiratory activities were increased. In hypoxia-induced gasping, both the laryngeal and spinal expiratory activities were reduced. All of the inspiratory activities were increased during both gasping and the AR. In addition, neural activities were below control levels following AR; activities gradually recovered to control levels. We conclude that spinal expiratory activities are inhibited during the AR and gasping. Results are consistent with the concept that medullary mechanisms for gasping are recruited by mechanical stimulation of the epipharynx. In hypoxia-induced gasping, the hypoxia, per se, causes a separate suppression of laryngeal expiratory activities.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/resphysiolen_US
dc.relation.ispartofRespiration Physiologyen_US
dc.subject.meshAnimalsen_US
dc.subject.meshAnoxia - Physiopathologyen_US
dc.subject.meshBrain Stem - Cytology - Physiologyen_US
dc.subject.meshCatsen_US
dc.subject.meshFemaleen_US
dc.subject.meshInhalationen_US
dc.subject.meshMaleen_US
dc.subject.meshNeurons - Physiologyen_US
dc.subject.meshPharynx - Innervation - Physiologyen_US
dc.subject.meshPhysical Stimulationen_US
dc.subject.meshReflex - Physiologyen_US
dc.subject.meshRespiration - Physiologyen_US
dc.subject.meshRespiratory Center - Physiologyen_US
dc.titleExpiratory neural activities in gasping induced by pharyngeal stimulation and hypoxiaen_US
dc.typeArticleen_US
dc.identifier.emailFung, ML:fungml@hkucc.hku.hken_US
dc.identifier.authorityFung, ML=rp00433en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/0034-5687(94)00128-Men_US
dc.identifier.pmid7624613-
dc.identifier.scopuseid_2-s2.0-0028934049en_US
dc.identifier.volume100en_US
dc.identifier.issue2en_US
dc.identifier.spage119en_US
dc.identifier.epage127en_US
dc.identifier.isiWOS:A1995QX99700003-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridFung, ML=7101955092en_US
dc.identifier.scopusauthoridSt John, WM=36831054200en_US

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