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Titolo:
INTERACTION BETWEEN CENTRAL PATTERN GENERATORS FOR BREATHING AND SWALLOWING IN THE CAT
Autore:
DICK TE; OKU Y; ROMANIUK JR; CHERNIACK NS;
Indirizzi:
CASE WESTERN RESERVE UNIV,SCH MED,DEPT MED CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,SCH MED,DEPT PHYSIOL & BIOPHYS CLEVELAND OH44106 CASE WESTERN RESERVE UNIV,SCH MED,DEPT NEUROSCI CLEVELAND OH 44106 METRO HLTH MED CTR,DEPT MED CLEVELAND OH 00000
Titolo Testata:
Journal of physiology
, volume: 465, anno: 1993,
pagine: 715 - 730
SICI:
0022-3751(1993)465:<715:IBCPGF>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
LARYNGEAL AFFERENT STIMULATION; SUPERIOR LARYNGEAL; NEURAL ACTIVITIES; COORDINATION; EXPIRATION; NEURONS; NERVE; RESPIRATION; VAGAL; RESPONSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
T.E. Dick et al., "INTERACTION BETWEEN CENTRAL PATTERN GENERATORS FOR BREATHING AND SWALLOWING IN THE CAT", Journal of physiology, 465, 1993, pp. 715-730

Abstract

1. We examined the interaction between central pattern generators forrespiration and deglutition in decerebrate, vagotomized, paralysed and ventilated cats (n = 10), by recording activity from the following nerves: hypoglossal, phrenic, thyroarytenoid and triangularis sterni. Fictive breathing was spontaneous with carbon dioxide above the apnoeicthreshold (end-tidal P(CO2), 32 +/- 4 mmHg) and fictive swallowing was induced by stimulating the internal branch of the left superior laryngeal nerve (SLN) continuously (0.2 ms pulse duration, 10 Hz). 2. In all ten animals, SLN stimulation evoked short bursts of thyroarytenoid and hypoglossal nerve activity indicative of fictive swallowing. In two of ten animals, respiration was inhibited completely during deglutition. In the other eight animals, fictive breathing and swallowing occurred simultaneously. 3. With SLN stimulation below threshold for eliciting swallowing, the respiratory rhythm decreased, the duration of inspiration did not change but the duration of expiration, especially stage II, increased. Integrated nerve activities indicated that the rate of rise and peak of phrenic nerve activity decreased, stage I expiratory activity of the thyroarytenoid and especially that of the hypoglossal nerve increased and stage II expiratory activity of the triangularis sterni nerve was suppressed completely. However, if inspired carbon dioxide was increased, i.e. hypercapnic ventilation, stage II expiratory activity remained partially during continuous SLN stimulation. 4. Fictive-swallowing bursts occurred only at respiratory phase transitions. At the minimal stimulus intensity that evoked repetitive swallowingbursts, the pattern of interaction between breathing and swallowing central pattern generators was consistent for each animal (n = 7) but was different across animals. In four animals, fictive swallows occurred at the phase transition between stage II expiration and inspiration,at the transition between inspiration and stage I expiration in one animal; and in two other animals, at the transition between stage I andII of expiration.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/01/20 alle ore 21:43:55