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Titolo:
Modulation of laryngeal and respiratory pump muscle activities with upper airway pressure and flow
Autore:
Stella, MH; England, SJ;
Indirizzi:
Univ Med & Dent New Jersey, Robert Wood Johnson Med Sch, Dept Pediat, New Brunswick, NJ 08903 USA Univ Med & Dent New Jersey New Brunswick NJ USA 08903 swick, NJ 08903 USA Rutgers State Univ, Dept Biomed Engn, Piscataway, NJ 08854 USA Rutgers State Univ Piscataway NJ USA 08854 Engn, Piscataway, NJ 08854 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 2, volume: 91, anno: 2001,
pagine: 897 - 904
SICI:
8750-7587(200108)91:2<897:MOLARP>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHEST-WALL COMPLIANCE; GUINEA-PIG; VENTILATORY DEPRESSION; BREATHING PATTERN; RECEPTORS; COLD; MECHANORECEPTORS; RESISTANCE; KITTENS; PUPPIES;
Keywords:
control of breathing; posterior cricoarytenoid; thyroarytenoid; larynx; reflexes; piglet;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Stella, MH Dartmouth Med Sch, Dept Physiol, 1 Med Ctr Dr, Lebanon, NH 03756 USA Dartmouth Med Sch 1 Med Ctr Dr Lebanon NH USA 03756 H 03756 USA
Citazione:
M.H. Stella e S.J. England, "Modulation of laryngeal and respiratory pump muscle activities with upper airway pressure and flow", J APP PHYSL, 91(2), 2001, pp. 897-904

Abstract

The hypothesis that upper airway (UA) pressure and flow modulate respiratory muscle activity in a respiratory phase-specific fashion was assessed in anesthetized, tracheotomized, spontaneously breathing piglets. We generatednegative pressure and inspiratory flow in phase with tracheal inspiration or positive pressure and expiratory flow in phase with tracheal expiration in the isolated UA. Stimulation of UA negative pressure receptors with bodytemperature air resulted in a 10-15% enhancement of phasic moving-time-averaged posterior cricoarytenoid electromyographic (EMG) activity above toniclevels obtained without pressure and flow in the UA (baseline). Stimulation of UA positive pressure receptors increased phasic moving-time-averaged thyroarytenoid EMG activity above tonic levels by 45% from baseline. The same enhancement of posterior cricoarytenoid or thyroarytenoid EMG activity was observed with the addition of flow receptor stimulation with room temperature air. Tidal volume and diaphragmatic and abdominal muscle activity wereunaffected by UA flow and/or pressure, whereas respiratory timing was minimally affected. We conclude that laryngeal afferents, mainly from pressure receptors, are important in modulating the respiratory activity of laryngeal muscles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/01/20 alle ore 13:16:09