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Titolo:
Cerebroid ganglion is the presumptive pacemaker of the circadian rhythm ofelectrical response to light in the crayfish
Autore:
Hernandez, OH; Fuentes-Pardo, B;
Indirizzi:
Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Mexico City 04510, DF, Mexico Natl Autonomous Univ Mexico Mexico City DF Mexico 04510 04510, DF, Mexico Univ Autonoma Campeche, Ctr Invest Enfermedades Trop, Campeche, Mexico Univ Autonoma Campeche Campeche Mexico ermedades Trop, Campeche, Mexico
Titolo Testata:
BIOLOGICAL RHYTHM RESEARCH
fascicolo: 2, volume: 32, anno: 2001,
pagine: 125 - 144
SICI:
0929-1016(2001)32:2<125:CGITPP>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
HORMONE-IMMUNOREACTIVE NEURONS; COCKROACH LEUCOPHAEA-MADERAE; COMPOUND FIELD POTENTIALS; CENTRAL-NERVOUS-SYSTEM; SINUS GLAND; SUPRACHIASMATIC NUCLEUS; NEURAL ACTIVITY; BRAIN; CLOCK; INTERNEURONS;
Keywords:
circadian rhythm; crayfish; brain; multiunit activity; visual evoked potentials;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
57
Recensione:
Indirizzi per estratti:
Indirizzo: Fuentes-Pardo, B Natl Autonomous Univ Mexico, Fac Med, Dept Fisiol, Apdo Postal 70-250, Mexico City 04510, DF, Mexico Natl Autonomous Univ Mexico Apdo Postal 70-250 Mexico City DF Mexico 04510
Citazione:
O.H. Hernandez e B. Fuentes-Pardo, "Cerebroid ganglion is the presumptive pacemaker of the circadian rhythm ofelectrical response to light in the crayfish", BIOL RH RES, 32(2), 2001, pp. 125-144

Abstract

One of the most widely studied circadian rhythms in invertebrates is that of light responsiveness whose underlying mechanisms seem to involve different groups of oscillators which act as pacemakers. Although, in crayfish, there are clear circadian rhythms in the electroretinogram (ERG) amplitude, the precise location of the pacemaker system driving this rhythm is uncertain. Some data suggest that the circadian pacemaker could be located in a group of neurosecretory cells of the supraesophageal ganglion (the cerebroid ganglion or brain) and that the sinus gland plays a determinant role in the generation and expression of this rhythm through periodic release of pigment-dispersing hormone (PDH). The aim of this work is to examine the role of the brain in the expression of the ERG circadian activity. The hypothesis we test is that the electrical activity at the brain level has a circadian behavior in the firing pattern of spontaneous multiunit activity (MUA) and in visual evoked potentials (VEPs). The results indicate that there are robust circadian rhythms in both MUA, recorded from several regions of the brain, and in the averaged VEPs recorded from the protocerebrum area. These rhythms are 180 degrees out of phase to one another. The rhythm of VEPs showeda main peak at midnight which was in close phase relationship with the ERGamplitude rhythm.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:51:06