In this study we recorded locomotor activity of two inbred of mice (B6 and C) in two photoperiod conditions (LD 12:12 and DD) to characterize behavioural parameters of the endogenous rhythms of locomotor activity with particular attention to the ultradian rhythms. Literature reveals discordant data for these parameters, both for animals belonging to the same strain and to those in the same laboratory or monitored in the same conditions. Our results show that C strain has a shorter and unstable endogenous circadian period, while B6 strain has a longer and stable endogenous rhythm. In our study, B6 showed a longer and stable period than C, so we can confirm the presence of a genetic component underlying this trait. Ultradian rhythms are expressed independently of either the photoperiod or the circadian rhythm. There are no strain-dependent differences in the periods of 12, 8 and 4 h. The situation was different for the length of the ultradian period in the range 1-8 h and for the weighted power in the ranges 480-300 and 300-100 min, for which there were differences between photoperiods and strains.

Circadian and ultradian rhythms in locomotory activity of inbred strains of mice / Pasquali, Vittorio; Anna, Capasso; Renzi, Paolo. - In: BIOLOGICAL RHYTHM RESEARCH. - ISSN 0929-1016. - STAMPA. - 41:1(2010), pp. 63-74. [10.1080/09291010902863362]

Circadian and ultradian rhythms in locomotory activity of inbred strains of mice

PASQUALI, Vittorio;RENZI, Paolo
2010

Abstract

In this study we recorded locomotor activity of two inbred of mice (B6 and C) in two photoperiod conditions (LD 12:12 and DD) to characterize behavioural parameters of the endogenous rhythms of locomotor activity with particular attention to the ultradian rhythms. Literature reveals discordant data for these parameters, both for animals belonging to the same strain and to those in the same laboratory or monitored in the same conditions. Our results show that C strain has a shorter and unstable endogenous circadian period, while B6 strain has a longer and stable endogenous rhythm. In our study, B6 showed a longer and stable period than C, so we can confirm the presence of a genetic component underlying this trait. Ultradian rhythms are expressed independently of either the photoperiod or the circadian rhythm. There are no strain-dependent differences in the periods of 12, 8 and 4 h. The situation was different for the length of the ultradian period in the range 1-8 h and for the weighted power in the ranges 480-300 and 300-100 min, for which there were differences between photoperiods and strains.
2010
radar doppler; locomotory activity; ultradian rhythms; circadian rhythms; inbred strains
01 Pubblicazione su rivista::01a Articolo in rivista
Circadian and ultradian rhythms in locomotory activity of inbred strains of mice / Pasquali, Vittorio; Anna, Capasso; Renzi, Paolo. - In: BIOLOGICAL RHYTHM RESEARCH. - ISSN 0929-1016. - STAMPA. - 41:1(2010), pp. 63-74. [10.1080/09291010902863362]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/20083
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 7
social impact