Locomotor Activity Rhythm
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. Caracterização do perfil do ciclo sono-vigília em ratos sob dessincronização forçada / Characterization of sleep-wake cycle profile in rats under forced desynchronization
O comportamento circadiano associado ao ciclo diário de 24 horas deve-se à ação de um relógio circadiano que em mamíferos se localiza nos núcleos supraquiasmáticos do hipotálamo (NSQs). Sob condições experimentais em que ratos são submetidos a um ciclo claro-escuro (CE) simétrico de 22h (T22) as regiões ventrolateral (vl) e dorsomedial (dm) dos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/12/2011
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2. Proposta e avaliação de um modelo computacional de gerador central de padrões / Proposal and evaluation of a computational model of Central Pattern Generator
The concept of Central Pattern Generator-CPG can be described as neural network capable of producing coordinated rhythmic locomotor activity apart from any external rhythm or sensorial stimuli. As this group of neurons are autonomic and are located in the spinal medulla, is experimentally observed that brainless animal‟s exhibit robotized locomotor act
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2011
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3. Proposta e avaliação de um modelo computacional de gerador central de padrões / Proposal and evaluation of a computational model of Central Pattern Generator
The concept of Central Pattern Generator-CPG can be described as neural network capable of producing coordinated rhythmic locomotor activity apart from any external rhythm or sensorial stimuli. As this group of neurons are autonomic and are located in the spinal medulla, is experimentally observed that brainless animal‟s exhibit robotized locomotor act
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/06/2011
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4. The effect of the light and tidal cycles on the rhythmicity of the locomotor activity of Bathygobius soporator (Valenciennes 1837) (Teleostei: Perciformes: Gobiidae) / Efeitos dos ciclos de iluminação e de marés na ritmicidade da atividade locomotora de Bathygobius soporator (Valenciennes,1837) (Teleostei: Perciformes: Gobiidae)
Muitos trabalhos sobre comportamento consideram que os ritmos observados são simplesmente uma resposta aos estímulos ambientais. No entanto, desde o século XVIII, sabe-se que a temporização é real e muitos organismos exibem ritmos endógenos que são arrastados por zeitgebers ou "doadores de tempo". Para a grande maioria dos seres vivos, o principal ze
Publicado em: 2008
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5. "Sincronização da atividade locomotora em robalos juvenis (Centropomus parallelus e C. undecimalis) pelo ciclo claro/escuro e ciclo de disponibilidade alimentar" / Syncronization on locomotor activity in juvenile snook (Centropomus parallelus e C. undecimalis) by light/dark cycle and food availability cycle
Os peixes são organismos plásticos em relação às alterações de ciclos ambientais como o ciclo claro/escuro e ciclo de disponibildade alimentar, zeitgebers comprovadamente fortes para outros organismos vertebrados. O objetivo geral deste estudo foi verificar se o ciclo claro /escuro (CE) e o ciclo de disponibilidade alimentar (AJ) promovem sincronizaç
Publicado em: 2006
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6. Clock Mutants of Drosophila melanogaster
Three mutants have been isolated in which the normal 24-hour rhythm is drastically changed. One mutant is arrhythmic; another has a period of 19 hr; a third has a period of 28 hr. Both the eclosion rhythm of a population and the locomotor activity of individual flies are affected. All these mutations appear to involve the same functional gene on the X chromo
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7. Excitatory Actions of Ventral Root Stimulation During Network Activity Generated by the Disinhibited Neonatal Mouse Spinal Cord
To further understand the excitatory effects of motoneurons on spinal network function, we investigated the entrainment of disinhibited rhythms by ventral root (VR) stimulation in the neonatal mouse spinal cord. A brief train of stimuli applied to a VR triggered bursting reliably in 31/32 experiments. The same roots that entrained disinhibited bursting could
American Physiological Society.
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8. Effects of 5,7-dihydroxytriptamine (5,7-DHT) on circadian locomotor activity of the blow fly, Calliphora vicina
The biogenic amine serotonin (5-HT) is a neuromodulator in both vertebrates and invertebrates. It has been shown that serotonin, apart from its distinct effects on behavior, also plays a morphoregulatory role during the ontogeny of the insect's nervous system. The role of serotonin in modulating circadian locomotor activity of the blow fly, Calliphora vicina
University of Arizona Library.
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9. Bimodal circadian secretion of melatonin from the pineal gland in a living CBA mouse
Circadian melatonin secretion is the best-known output signal from the circadian pacemaker in the suprachiasmatic nucleus that indicates internal conditions of the body. We have established a system that enables long-term monitoring of melatonin secretion by implanting a transverse microdialysis probe in or near the pineal gland in a freely moving mouse.
National Academy of Sciences.
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10. Phenotypic and Genetic Analysis of Clock, a New Circadian Rhythm Mutant in Drosophila Melanogaster
Clock is a semidominant X-linked mutation that results in shortening the period of Drosophila melanogaster's free-running locomotor activity rhythm from ca. 24.0 to ca. 22.5 hr. This mutation similarly shortened the phase response curve, determined by resetting activity rhythms with light pulses. Eclosion peaks for Clk cultures were separated by only 22.5 hr
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11. Impaired locomotor activity and exploratory behavior in mice lacking histamine H1 receptors
From pharmacological studies using histamine antagonists and agonists, it has been demonstrated that histamine modulates many physiological functions of the hypothalamus, such as arousal state, locomotor activity, feeding, and drinking. Three kinds of receptors (H1, H2, and H3) mediate these actions. To define the contribution of the histamine H1 recep
The National Academy of Sciences of the USA.
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12. Effects of stimulation of hindlimb flexor group II afferents during fictive locomotion in the cat.
1. This study examines the effects of electrical stimulation of hindlimb flexor nerves on the fictive locomotion pattern. Locomotion was initiated by stimulation of the mesencephalic locomotor region in the decerebrate paralysed cat and monitored by recording the electroneurogram from selected hindlimb flexor and extensor muscle nerves. Flexor nerves were st