Search results for "ratón"
showing 4 items of 64 documents
Antiaggressive and motor effects of the DA release inhibitor CGS 10746B
2001
In the present study the effects of a wide range of doses of the dopamine release inhibitor CGS 10746B were evaluated in spontaneous activity and in aggressive behaviour using the paradigm of isolation-induced aggression. The two higher doses (8 and 16 mg/kg) produced a decrease in spontaneous motor activity. Antiaggressive effects were observed after administration of doses from 4 mg/kg upwards. At this dose, CGS 10746B diminished threat and attack, and although an increase in immobility was observed, no impairment of other motor behaviours was presented. With higher doses, aggression was practically abolished but with a concomitant effect on many other behaviours. When animals were separa…
Motor activity in group-housed and isolated mice with short and long attack latencies: Effects of scopolamine
2002
Isolation-induced behavioral changes are well described in mice, although few studies have investigated the involvement of the cholinergic system in these effects. It has also been suggested that mice that display short or long attack latencies show differences in their reactions to a novel environment. The purpose of the present study was, first, to investigate locomotor activity in grouped and isolated mice that displayed short or long attack latencies and, second, to evaluate locomotor activity to determine whether it was affected interactively by differential housing and scopolamine treatment. Two experiments were performed in which NMRI mice, either isolated or group housed, were used …
Herpes simplex virus type 1 and 2 in the adrenal glands: Replication and histopathology
1986
The adrenal glands were shown to be the most severely infected organs in the early phase of HSV-1 infections (up to 10 days p.i.) after i.p. infections in mice. Virus could be isolated from the adrenal glands as early as one hour after infection with pathogenic and apathogenic strains. Infection of the adrenal glands is a result of viremia. The content of HSV-1 (5 strains) was much higher in the adrenals than in spleen and liver. It peaked at 3-4 days p.i. compared to 1-2 days in spleen and liver. Only strain 17 syn+ produced low tissue titres in the adrenal glands. Morphologic alterations by HSV-1 infections commenced with distinct foci 2 days after infection in the zona fasciculata, detec…
Mapping the actions of prolactin in the brain: sexual dimorphism, steroid regulation and the neuroendocrinology of maternal behaviour
2017
El comportamiento maternal cumple la función de proteger a la descendencia en su periodo de mayor vulnerabilidad y asegurar su supervivencia y bienestar. Esta colección de conductas sociales será expresada por la madre exclusivamente durante el periodo postparto, como resultado de la modulación del sustrato neural responsable de la expresión de la conducta social y reproductiva. Los agentes que llevan a cabo dicha modulación para inducir la expresión del comportamiento maternal incluyen, entre otros, señales endocrinas específicas de la gestación y lactancia. Entre éstas destaca la prolactina, hormona adenohipofisaria estrechamente vinculada con la adaptación del organismo a la maternidad. …