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Titolo:
AUTONOMIC NERVOUS FUNCTION IN MICE AND VOLES (MICROTUS-ARVALIS) - INVESTIGATION BY POWER SPECTRAL-ANALYSIS OF HEART-RATE-VARIABILITY
Autore:
ISHII K; KUWAHARA M; TSUBONE H; SUGANO S;
Indirizzi:
UNIV TOKYO,GRAD SCH AGR & LIFE SCI,DEPT COMPARAT PATHOPHYSIOL,BUNKYO KU,1-1-1 YAYOI TOKYO 113 JAPAN
Titolo Testata:
Laboratory animals
fascicolo: 4, volume: 30, anno: 1996,
pagine: 359 - 364
SICI:
0023-6772(1996)30:4<359:ANFIMA>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
CARDIOVASCULAR VARIABILITY; BLOOD-PRESSURE;
Keywords:
AUTONOMIC NERVOUS FUNCTION; HEART RATE; MICE; POWER SPECTRAL ANALYSIS; RADIOTELEMETRY; VOLES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
K. Ishii et al., "AUTONOMIC NERVOUS FUNCTION IN MICE AND VOLES (MICROTUS-ARVALIS) - INVESTIGATION BY POWER SPECTRAL-ANALYSIS OF HEART-RATE-VARIABILITY", Laboratory animals, 30(4), 1996, pp. 359-364

Abstract

We have studied the autonomic nervous function in voles (Microtus arvalis) and mice. For this purpose, ECGs were recorded from conscious and unrestrained voles and mice using radiotelemetry and the autonomic nervous function was investigated by the power spectral analysis of heart rate variability. Heart rate in voles was lower than mice and the coefficient of variance was larger in voles. In the power spectra of voles and mice, there were two major spectral components with the high frequency (HF) peak generally appearing between 2.0 and 4.0 Hz, and thelow frequency (LF) peak appearing below 0.6 Hz. On the basis of this data, we set the two frequency bands as LF (0.1-1.0 Hz) and HF (1.0-5.0 Hz) to evaluate autonomic nervous function. The LF and HF powers were larger in voles than mice. The LF/HF ratio was thought to provide a convenient index of autonomic nervous balance and was smaller in volesthan mice. The LF powers in both species were reduced by atropine, but propranolol reduced the LF power only in mice. The HF power was reduced by atropine only in voles. The intrinsic heart rate produced by a double blockade with atropine and propranolol in voles was almost the same as control levels, but in mice was lower than controls. The ratioof the LF and HF powers by a double blockade were almost the same as those of the administration of atropine in voles, but nearer to propranolol in mice. These results suggested that the parasympathetic nervous function was predominant in voles, but the sympathetic one was predominant in mice.

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Documento generato il 09/07/20 alle ore 23:16:52