Abstract：
:Mechanisms underlying shock-induced conditioned fear - a paradigm frequently used to model posttraumatic stress disorder, PTSD - are usually studied shortly after shocks. Some of the brain regions relevant to conditioned fear were activated in all the c-Fos studies published so far, but the overlap between the activated regions was small across studies. We hypothesized that discrepant findings were due to dynamic neural changes that followed shocks, and a more consistent picture would emerge if consequences were studied after a longer interval. Therefore, we exposed rats to a single session of footshocks and studied their behavioral and neural responses one and 28 days later. The neuronal activation marker c-Fos was studied in 24 brain regions relevant for conditioned fear, e.g. in subdivisions of the prefrontal cortex, hippocampus, amygdala, hypothalamic defensive system, brainstem monoaminergic nuclei and periaqueductal gray. The intensity of conditioned fear (as shown by the duration of contextual freezing) was similar at the two time-points, but the associated neuronal changes were qualitatively different. Surprisingly, however, Multiple Regression Analyses suggested that conditioned fear-induced changes in neuronal activation patterns predicted the duration of freezing with high accuracy at both time points. We suggest that exposure to electric shocks is followed by a period of plasticity where the mechanisms that sustain conditioned fear undergo qualitative changes. Neuronal changes observed 28 days but not 1 day after shocks were consistent with those observed in human studies performed in PTSD patients.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Tulogdi A,Sörös P,Tóth M,Nagy R,Biró L,Aliczki M,Klausz B,Mikics E,Haller Jdoi
10.1016/j.brainresbull.2012.04.001subject
Has Abstractpub_date
2012-07-01 00:00:00pages
359-70issue
4eissn
0361-9230issn
1873-2747pii
S0361-9230(12)00060-3journal_volume
88pub_type
杂志文章abstract：:During a single-step visual tracking task of monkeys, parametric changes of the wrist extension-flexion movement and related discharge rate changes of pyramidal tract neurons (PTNs) of hand-arm motor area were studied. The task consisted of preparatory, precontraction, contraction and target periods. If the displaceme...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(79)90289-2
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abstract：:Single-unit recordings were made from lateral hypothalamic area (LHA) neurons of infant (8 through 21 days of age) male and female albino rats. Basal (or spontaneous) firing rates of LHA neurons were recorded for 20 min from rats 8 through 21 days of age, and mean basal firing rates did not differ across ages. Basal f...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(76)90081-2
更新日期：1976-11-01 00:00:00
abstract：:Administering increasing dosages of 5alpha-dihydrotestosterone propionate (DHTP) (0, 40, or 80 microgram/100 g in oil daily) to ovariectomized female rats treated concurrently with estradiol benzoate (EB) (1 microgram/100 g in oil daily) caused significant, equivalent reduction in lordotic responsiveness in rats maint...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(81)90090-3
更新日期：1981-07-01 00:00:00
abstract：:miR-196a is located in the posterior trunk and plays a role in limb development. Here we show that miR-196a is able to induce eye anomaly in Xenopus laevis. Microinjection of synthetic miRNA precursor molecule for mammalian miR-196a into Xenopus embryo is sufficient for miR-196a overexpression during early development...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.12.009
更新日期：2009-04-06 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(97)00451-6
更新日期：1998-04-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90107-4
更新日期：1994-01-01 00:00:00
abstract：:Sigma receptor agonists have been found to provide potent neuroprotection in rats and mice. This neuroprotection is thought to be mediated through anti-excitotoxic mechanisms. Neuroprotective and immune modulatory effects of sigma ligands have not been investigated in embolic stroke. In the present study, rats were su...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2011.03.019
更新日期：2011-05-30 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(91)90036-j
更新日期：1991-11-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.01.023
更新日期：2008-07-30 00:00:00
abstract：:In order to test the functional significance of noradrenergic neurotransmission for brain maturation, rat pups were injected daily with clonidine from 8-21 days of postnatal life. In adulthood, single cell responses to microiontophoretically applied neurotransmitters were studied in different layers of the hippocampus...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(89)90212-8
更新日期：1989-10-01 00:00:00
abstract：:Anxiety disorders and nicotine use are significant contributors to global morbidity and mortality as independent and comorbid diseases. Early-life stress, potentially via stress-induced hypothalamic-pituitary-adrenal axis (HPA) dysregulation, can exacerbate both. However, little is known about the factors that predisp...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2017.08.001
更新日期：2018-04-01 00:00:00
abstract：BACKGROUND:Deep brain stimulation (DBS) refers to the delivery of electric current to specific deep brain structures through implanted electrodes. Recently approved for use in United States, DBS to the anterior nucleus of thalamus (ANT) is a safe and effective alternative treatment for medically refractory seizures. De...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.011
更新日期：2019-04-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(03)00141-2
更新日期：2003-08-30 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90078-c
更新日期：1992-09-01 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(97)00118-4
更新日期：1997-01-01 00:00:00
abstract：:Phase and amplitude depth profiles of EEG theta-like activity (TLA) induced by bath perfusion of 50 micro M of the cholinergic agonist carbachol were investigated using rat hippocampal formation slices. The data showed that the amplitude and phase of laminar profiles of TLA recorded in vitro were the same as the type ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(02)00827-4
更新日期：2002-09-30 00:00:00
abstract：:Calcium channels affect many neuronal functions, including membrane electrical excitability, synaptic transmission, cellular homeostasis, gene transcription, growth, and development. We used recently developed methods for serum-free culture of adult and embryonic rat neurons to study the development of voltage-sensiti...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(98)00147-6
更新日期：1999-01-01 00:00:00
abstract：:This study aims to evaluate the neuroprotective effect of sodium butyrate against the pentylenetetrazol (PTZ)-induced kindling epilepsy. Sodium butyrate (SB) (5, 10 and 20 mg/kg) and sodium valproate for 40 days and PTZ (37 mg/kg) injection every day were conducted for Kunming mice, to investigate seizure intensity an...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2020.12.009
更新日期：2020-12-28 00:00:00
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journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90011-6
更新日期：1994-01-01 00:00:00
abstract：:Fluoro-Ruby (tetramethylrhodamine-dextran amine conjugate) has been shown recently to be an effective anterograde tracer readily visible in brain sections with fluorescence microscopy. We show in this study that further microscopic analysis of Fluoro-Ruby-labeled elements is feasible with a conventional immunoperoxida...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90046-e
更新日期：1993-01-01 00:00:00
abstract：:The present study examined the changes of extracellular concentration of dopamine and its metabolite homovanillic acid in the striatum, the periaqueductal gray and the dorsal horn of lumbar spinal cord following intraplantar injection of carrageenan. In vivo microdialysis and high-performance liquid chromatography wit...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(00)00460-3
更新日期：2001-03-01 00:00:00
abstract：:Ouabain, tetrodotoxin, and calcium selective ionophore (A23187) were administered bilaterally into the hypothalamus of the unrestrained, fully conscious cat, while body temperature and other indicators of thermoregulatory responses were monitored continuously. Posterior hypothalamic microinjection of 2.0 to 10.0 ng or...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(80)90286-5
更新日期：1980-01-01 00:00:00
abstract：:Endogenous levels of Aspartic acid, GABA and Glutamic acid plus Glutamine were measured in the frontal, occipital, temporal and parietal cortex. Aspartic acid levels were found higher in the frontal cortex than in the rest of the cortical areas studied. GABA, however, had a homogenous distribution among all cortical a...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(84)90142-4
更新日期：1984-06-01 00:00:00
abstract：:The beta-galactosidase protein generated by the bacterial LacZ gene is widely used to map gene expression patterns. The ease of its use is only rivaled by green fluorescent protein, which can be used in combination with various other procedures such as immunocytochemistry, flow cytometry, or tract tracing. The beta-ga...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2005.11.007
更新日期：2006-06-15 00:00:00
abstract：:Fipronil, a GABA(A) receptor antagonist, is replacing many insecticide uses formerly fulfilled by organophosphates like chlorpyrifos. Few studies have addressed the potential for fipronil to produce developmental neurotoxicity. We compared the neurotoxicity of fipronil and chlorpyrifos in undifferentiated and differen...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.09.020
更新日期：2009-03-30 00:00:00
abstract：:Together with its companion paper, dealing with the contribution of Luigi Galvani to the history of electrophysiology, this article provides a biographical sketch of the scientist of Bologna in the occasion of the bicentenary of his death. Studies on Galvani have focused mainly on his "discovery" of animal electricity...
journal_title：Brain research bulletin
pub_type： 传,历史文章,杂志文章
doi：10.1016/s0361-9230(98)00023-9
更新日期：1998-07-15 00:00:00
abstract：:Electrical stimulation has been shown to have neuroprotective effects on ganglion cells and photoreceptors in axotomized and dystrophic retinas from Royal College of Surgeons (RCS) rats. This study determined whether electrical stimulation also has a neuroprotective effect on cells in the inner nuclear layer (INL) of ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2008.12.013
更新日期：2009-04-06 00:00:00
abstract：:Fetal mouse raphe and hippocampal tissue (from embryos with crown-rump length (CRL) 13-16 mm) was transplanted into adult and aged isogenetic mice to study the growth of serotonergic fibers between host and donor tissue. A specific antibody against serotonin (5-HT) was used to immunocytochemically visualize 5-HT conta...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(81)90122-2
更新日期：1981-12-01 00:00:00
abstract：:Hypothalamic-pituitary-adrenal (HPA) responses to single-dose nicotine (NIC) are sexually diergic: Female rats have higher adrenocorticotropic hormone (ACTH) and corticosterone (CORT) responses than do males. In the present study we determined HPA responses in male and female rats following single doses of NIC, a sing...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2011.03.001
更新日期：2011-05-30 00:00:00
abstract：:Eighty-four percent of principal cells in the dorsal nucleus of the lateral geniculate body exhibited a transient depression of spontaneous activity following optic tract stimulation. Antidromic corticofugal activity, generated by the evoked cortical field potential, was seen in 21% of the cells studied. In those cell...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(80)80002-5
更新日期：1980-07-01 00:00:00
