Abstract:
:Neonatal hypoxia-ischemia (HI) has been extensively studied in a rat model characterized by unilateral brain damage (Rice-Vannucci Model). However, as well as in humans, each rat brain hemisphere is distinctly involved in cognitive functions, as for example retrieval of emotionally based memory, and neurochemical asymmetries have been described. In this paper we investigated whether hypoxia-ischemia could cause distinct cognitive deficits depending on which hemisphere is damaged. Seven-day-old male Wistar rats were submitted to permanent occlusion of left or right common carotid artery and were exposed to a mixture of 8% oxygen-92% nitrogen for 2.5 h. On adulthood, these rats were trained in step-down inhibitory avoidance and in two tasks in the Morris water maze. Both experimental groups (right and left lesioned) showed a deficit of retrieval in the inhibitory avoidance task compared to controls, although rats with right hemisphere lesion showed a significantly greater deficit than the left damaged group (P<0.05). In the Morris maze, both damaged groups presented cognitive deficits in the reference memory task (P<0.05), however only the right damaged group had an impairment in the working memory task. Brain coronal areas, at levels +1.20 and -3.30 mm from bregma of both HI groups were smaller than those of control, with no differences between the right and left damaged groups (P<0.05). These results show that cerebral hypoxia-ischemia in neonatal rats causes asymmetric behavioral outcomes depending on which of the hemispheres is lesioned and support the hypothesis of lateralization of cognitive functions in the rodent brain.
journal_name
Brain Resjournal_title
Brain researchauthors
Arteni NS,Salgueiro J,Torres I,Achaval M,Netto CAdoi
10.1016/s0006-8993(03)02436-3subject
Has Abstractpub_date
2003-05-30 00:00:00pages
171-8issue
2eissn
0006-8993issn
1872-6240pii
S0006899303024363journal_volume
973pub_type
杂志文章相关文献
BRAIN RESEARCH文献大全abstract::Recent findings have shown that systemic morphine increases extracellular dopamine (DA), dihydroxyphenylacetic acid (DOPAC), homovanillic acid (HVA), ascorbic acid (AA) and uric acid concentrations in the striatum of freely moving rats. The morphine-induced increase in DA oxidative metabolism is highly correlated with...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)00371-0
更新日期:1998-06-22 00:00:00
abstract::To examine the role played by the basal forebrain cholinergic system in cortical activation, neuronal activity was investigated in the globus pallidus and substantia innominata of urethane-anaesthetized rats during large cortical slow waves and spontaneous or elicited low voltage fast activity. An effort was made to i...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(87)91521-6
更新日期:1987-12-22 00:00:00
abstract::Prenatal cocaine exposure causes alterations in auditory brainstem response in children and experimental animals and has adverse effects on auditory information processing and language skills in children. These effects may result from lesions in the cochlea since this organ is particularly sensitive to chemical insult...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2006.02.066
更新日期:2006-05-01 00:00:00
abstract::This study shows that permanent cell lines can be established from rat and mouse brain by direct tissue culture methodology without the aid of exogenous chemical or viral transforming agents. These cells were derived from specific areas of the brain, such as the cerebellum and hippocampus, at chosen times during fetal...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(77)91049-6
更新日期:1977-10-21 00:00:00
abstract::The distribution of neural elements immunoreactive to several peptides with a possible messenger role was studied in the lamprey spinal cord by using an indirect immunofluorescence method. Different patterns of immunoreactive (IR) fibers were detected by antisera raised against cholecystokinin, metorphamide, bombesin,...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(87)90392-1
更新日期:1987-04-07 00:00:00
abstract::The recently identified neuropeptide QRFP(26) is predominantly expressed in the hypothalamus and was suggested to play a role in the regulation of food intake following the observation of an acute orexigenic effect after central administration in mice. QRFP(26) exerts its effect via GPR103 and a newly identified recep...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2006.08.055
更新日期:2006-11-13 00:00:00
abstract::Previous research suggests that the prelimbic subregion of the medial prefrontal cortex (mPFC) is necessary for acquisition of cocaine-conditioned place preference (CPP). Recently, it has been shown that extinguished cocaine-CPP can be reinstated by cocaine priming injections, and that this effect reflects the incenti...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(03)03452-8
更新日期:2003-11-14 00:00:00
abstract::We investigated the influence of muramyl dipeptide (MDP), a cell wall component of Gram-positive bacteria, on cytokine-induced nitric oxide (NO) production in rat primary astrocytes. MDP alone did not induce NO release in astrocyte cultures. However, MDP increased astrocyte NO production and subsequent nitrite accumul...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(00)02920-6
更新日期:2000-11-10 00:00:00
abstract::Synaptophysin and synapsin, closely correlated on synaptic vesicles in terminals, may show a differential distribution at synapse formation and maturation. In order to disclose the fine structural details of these differences, synapsin and synaptophysin distribution was studied by immunocytochemistry on ligated bovine...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)00617-9
更新日期:1998-08-17 00:00:00
abstract::The effects of naltrexone, naltrindole (a selective delta opiate receptor antagonist) and beta-funaltrexamine (beta-FNA; a selective mu opiate receptor antagonist) on alcohol intake by C57BL/6 mice in a restricted access paradigm were examined. During the pretreatment baseline phase, mice consumed an average of 1.3 g/...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(93)90672-a
更新日期:1993-12-10 00:00:00
abstract::The rubrointerposital projection was studied in cats where wheat germ agglutinin-horseradish peroxidase (WGA-HRP) was implanted in various parts of the interposed nuclei. No retrogradely labelled rubral cells were observed following implantations in the posterior interposed nucleus, and only very few such cells were i...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(86)91370-3
更新日期:1986-11-05 00:00:00
abstract::Data are presented which show that background electric activity of the human brain is reduced by visual stimulation. Occipital EEG amplitude decreases 5-15% for all frequencies analyzed (0.2-40 Hz) upon pattern stimulation. The reduction is stimulus-specific, i.e. is the strongest for stimuli that activate a large num...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(91)90403-i
更新日期:1991-05-31 00:00:00
abstract::Diurnal changes in the intranuclear release of vasopressin (VP) and oxytocin (OT) in the suprachiasmatic (SCN), paraventricular (PVN) and supraoptic nuclei (SON) of the rat were studied by means of brain microdialysis. A significant diurnal variation in VP release in the SCN was detected, with the highest levels occur...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)00324-j
更新日期:1995-06-05 00:00:00
abstract::The changes in mean arterial pressure (MAP) and respiratory frequency (RF) in response to microinjection of NMDA or AMPA into the commissural subnucleus of the NTS (comNTS) at the calamus scriptorius level of awake rats were evaluated. Under tribromoethanol anesthesia, the rats received guide-cannulae in direction of ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2005.09.017
更新日期:2005-11-23 00:00:00
abstract::The current study explored the effects of prolonged antidepressant treatment on mRNA levels of two nuclear receptors in specific brain regions of an animal model of depression, the Wistar-Kyoto (WKY) rat. Both nuclear receptors have been implicated in the development or treatment of depression. The expression of nucle...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2010.09.041
更新日期:2010-11-29 00:00:00
abstract::To investigate whether a task rule carried over from the preceding trial modifies an early portion of the stimulus-locked lateralized readiness potential (sLRP), participants were asked to perform two different flanker tasks that were switched. One task required a left-hand response for a central letter "H" in a five-...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2010.05.050
更新日期:2010-07-30 00:00:00
abstract::Using mild heat shock of rat brain slices as a model for cellular insult, corticosteroid-mediated regulation of protein synthesis has been investigated. Following a single in vivo injection of rats with corticosterone or the Type II glucocorticoid receptor agonist, RU-28362, synthesis of a 28 kDa protein is elevated i...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(99)01988-5
更新日期:1999-11-13 00:00:00
abstract::The present study was designed to investigate the distribution of serotonin 5-HT1A receptor protein (5-HT1A-immunoreactivity) and its localization within cortical pyramidal neurons of the rat cingulate cortex. This experimental direction was inspired by recent data showing the role of 5-HT1A receptors in the pathology...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(03)03352-3
更新日期:2003-10-31 00:00:00
abstract::Odor stimulation of the nose in the box turtle and the gopher tortoise produced a characteristic series of slow potentials in the olfactory bulb which were referred to as the odor evoked response. When recorded with direct coupling, the odor evoked response had 3 components: wave I, a short duration monophasic event; ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(75)90914-2
更新日期:1975-10-24 00:00:00
abstract::The mismatch negativity is an electrophysiological marker of auditory change detection in the event-related brain potential and has been proposed to reflect an automatic comparison process between an incoming stimulus and the representation of prior items in a sequence. There is evidence for two main functional subcom...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2007.07.079
更新日期:2008-07-18 00:00:00
abstract::In the companion study (Dev. Brain Res., 34 (1987) 223-233), we showed that a monocular injection of antibodies against ox large retinal ganglion cells produces a 53% (low concentration) to 82% (high concentration) loss of Y-cells in lateral geniculate nucleus (LGN) layers A and A1 that receive inputs from the antibod...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0165-3806(87)90212-4
更新日期:1987-08-01 00:00:00
abstract::High-resolution positron emission tomography (microPET) allows for repeated observations of brain function in the same animal. In a previous study, using [(18)F] fluorodeoxyglucose (FDG) microPET, we demonstrated diminished glucose metabolism and subsequent recovery in the Neostriatum and thalamus ipsilateral to corti...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2003.12.006
更新日期:2004-03-26 00:00:00
abstract::Transependymal absorption of cerebrospinal fluid (CSF) in hydrocephalus is suggested by periventricular edema, but the necessary bulk flow of interstitial fluid (ISF) has not been found. We performed ventriculocisternal perfusions in adult cats using CSF with the extracellular marker [3H]sucrose. CSF pressure was main...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(82)90616-3
更新日期:1982-01-28 00:00:00
abstract::Previous work from this laboratory has documented that glutamate receptor activation and extracellular calcium entry into hippocampal neurons caused a long-lasting down-regulation of ligatin mRNA and protein. Here, we investigated whether glutamate reduced ligatin mRNA levels by decreasing the transcriptional activity...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)00599-l
更新日期:1995-09-25 00:00:00
abstract::Intra- and interhemispheric connections between the anterior ectosylvian visual area (AEV) and other visual cortical areas including the lateral suprasylvian (LSS) were examined in the cat using the retrograde double-label fluorescence technique. The areal and laminar distributions of labeled neurons were mapped follo...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(85)90189-1
更新日期:1985-11-18 00:00:00
abstract::This work describes the presence of glucocorticoid binding sites in human temporal cortex obtained following partial lobectomy in two epileptic patients. Using [3H]dexamethasone as radioligand and cold cortisol or RU 28362 as competitor we found an apparent Kd of approximately 2.8 nM with a Bmax of approximately 34 fm...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)91444-8
更新日期:1988-02-23 00:00:00
abstract::The distribution of [125I]hCGRP alpha binding sites was studied in tissue sections from rat brain and, at the level of the nucleus accumbens in the brains of 6 other species. In the rat, very high levels of binding were found in the nucleus accumbens, the amygdaloid complex and mammillary body while high amounts were ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(91)90686-p
更新日期:1991-01-18 00:00:00
abstract::Elevated levels of lactic acid can be deleterious to CNS tissue. Lactic acid is known to cause astroglial swelling and since glial swelling has been shown to inhibit L-glutamate (L-Glu) uptake, we examined whether one of the actions of lactic acid is to inhibit L-Glu uptake. Astrocyte cultures treated with lactic acid...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(96)01331-5
更新日期:1997-03-07 00:00:00
abstract::Activation of the immune system produces psychological and physiological effects, which resemble the characteristics of depression. The present study was designed to investigate further, in rats, the similarity between the behavioral effects of immune activation and a model of depression in animals. Reduction in the p...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)01415-2
更新日期:1996-03-04 00:00:00
abstract::Mechanisms underlying hypoxia-induced neuronal adaptation have not been fully elucidated. In the present study we investigated glucose metabolism and the activities of glycolytic and TCA cycle enzymes in cerebro-cortical neurons exposed to hypoxia (3 days in 1% of O2) or normoxia (room air). Hypoxia led to increased a...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2008.06.074
更新日期:2008-09-10 00:00:00