| Texto completo | |
| Autor(es): |
Taylor, Edwin W.
[1, 2]
;
Leite, Cleo A. C.
[3, 4]
;
Sartori, Marina R.
[2, 4]
;
Wang, Tobias
[5]
;
Abe, Augusto S.
[2, 4]
;
Crossley, II, Dane A.
[6]
Número total de Autores: 6
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Paulista, Dept Zool, Inst Biociencias, BR-13506900 Sao Paulo - Brazil
[2] Univ Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands - England
[3] Univ Fed Sao Paulo, Dept Ciencias Biol, BR-04021001 Sao Paulo - Brazil
[4] Natl Inst Sci & Technol Comparat Physiol, Sao Carlos, SP - Brazil
[5] Aarhus Univ, Dept Biosci, DK-8000 Aarhus - Denmark
[6] Crossley, Dane A., II, Univ N Texas, Dept Biol Sci, Dev Integrat Biol Cluster, Denton, TX 76203 - USA
Número total de Afiliações: 6
|
| Tipo de documento: | Artigo de Revisão |
| Fonte: | Journal of Experimental Biology; v. 217, n. 5, p. 690-703, MAR 2014. |
| Citações Web of Science: | 36 |
| Resumo | |
Heart rate in vertebrates is controlled by activity in the autonomic nervous system. In spontaneously active or experimentally prepared animals, inhibitory parasympathetic control is predominant and is responsible for instantaneous changes in heart rate, such as occur at the first air breath following a period of apnoea in discontinuous breathers like inactive reptiles or species that surface to air breathe after a period of submersion. Parasympathetic control, exerted via fast-conducting, myelinated efferent fibres in the vagus nerve, is also responsible for beat-to-beat changes in heart rate such as the high frequency components observed in spectral analysis of heart rate variability. These include respiratory modulation of the heartbeat that can generate cardiorespiratory synchrony in fish and respiratory sinus arrhythmia in mammals. Both may increase the effectiveness of respiratory gas exchange. Although the central interactions generating respiratory modulation of the heartbeat seem to be highly conserved through vertebrate phylogeny, they are different in kind and location, and in most species are as yet little understood. The heart in vertebrate embryos possesses both muscarinic cholinergic and beta-adrenergic receptors very early in development. Adrenergic control by circulating catecholamines seems important throughout development. However, innervation of the cardiac receptors is delayed and first evidence of a functional cholinergic tonus on the heart, exerted via the vagus nerve, is often seen shortly before or immediately after hatching or birth, suggesting that it may be coordinated with the onset of central respiratory rhythmicity and subsequent breathing. (AU) | |
| Processo FAPESP: | 08/57712-4 - Instituto Nacional de Pesquisas em Fisiologia Comparada |
| Beneficiário: | Augusto Shinya Abe |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 12/16537-0 - Controle cardiovascular autonômico e metabolismo em embriões lagartos (Reptilia; Lepidosauria) |
| Beneficiário: | Marina Rincon Sartori |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 12/06938-8 - Desenvolvimento do controle neural no sistema cardiovascular de répteis |
| Beneficiário: | Augusto Shinya Abe |
| Modalidade de apoio: | Auxílio à Pesquisa - Pesquisador Visitante - Internacional |
| Processo FAPESP: | 08/00107-1 - Desvio sanguíneo intracardíaco em Crotalus durissus: controle vagal, padrões hemodinâmicos e papel fisiológico |
| Beneficiário: | Cléo Alcantara Costa Leite |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 10/51995-4 - Fases de desenvolvimento e controle cardiaco em embrioes de repteis |
| Beneficiário: | Augusto Shinya Abe |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |