Abstract：
:Motor neurons are endowed with intrinsic and conditional membrane properties that may shape the final motor output. In the first half of this paper we present data on the contribution of I(h), a hyperpolarization-activated inward cation current, to phase-transition in motor neurons during rhythmic firing. Motor neurons were recorded intracellularly during locomotion induced with a mixture of N-methyl-D-aspartate (NMDA) and serotonin, after pharmacological blockade of I(h). I(h) was then replaced by using dynamic clamp, a computer program that allows artificial conductances to be inserted into real neurons. I(h) was simulated with biophysical parameters determined in voltage clamp experiments. The data showed that electronic replacement of the native I(h) caused a depolarization of the average membrane potential, a phase-advance of the locomotor drive potential, and increased motor neuron spiking. Introducing an artificial leak conductance could mimic all of these effects. The observed effects on phase-advance and firing, therefore, seem to be secondary to the tonic depolarization; i.e., I(h) acts as a tonic leak conductance during locomotion. In the second half of this paper we discuss recent data showing that the neonatal rat spinal cord can produce a stable motor rhythm in the absence of spike activity in premotor interneuronal networks. These coordinated motor neuron oscillations are dependent on NMDA-evoked pacemaker properties, which are synchronized across gap junctions. We discuss the functional relevance for such coordinated oscillations in immature and mature spinal motor systems.
journal_name
Brain Res Bulljournal_title
Brain research bulletinauthors
Kiehn O,Kjaerulff O,Tresch MC,Harris-Warrick RMdoi
10.1016/s0361-9230(00)00398-1keywords:
subject
Has Abstractpub_date
2000-11-15 00:00:00pages
649-59issue
5eissn
0361-9230issn
1873-2747pii
S0361-9230(00)00398-1journal_volume
53pub_type
杂志文章,评审abstract：:The effects of separate and simultaneous recombinant bovine (rb) activin A and buserelin administration on the FSH release and pituitary FSH beta subunit gene expression in vivo were examined in ovariectomised, estradiol pretreated rats. The animals received a single injection of either rb activin A (50 ng), buserelin...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(02)00821-3
更新日期：2002-09-15 00:00:00
abstract：:Promoting remyelination and/or minimizing demyelination are key therapeutic strategies under investigation for diseases and injuries like multiple sclerosis (MS), spinal cord injury, stroke, and virus-induced encephalopathy. Myelination is essential for efficacious neuronal signaling. This myelination process is origi...
journal_title：Brain research bulletin
pub_type： 杂志文章,评审
doi：10.1016/j.brainresbull.2019.07.013
更新日期：2019-10-01 00:00:00
abstract：:GnRH release from hypothalamic explants from young and aged male Wistar-Kyoto rats was evaluated following stimulation with glutamate receptor agonists. Glutamate stimulated GnRH release to a similar extent in hypothalami from young and old animals, whereas N-methyl-D-Aspartate (NMDA) and kainate appeared more efficac...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/s0361-9230(96)00199-2
更新日期：1996-01-01 00:00:00
abstract：:The central GABAergic system is associated with normal blood pressure regulation, but the role of GABA receptors in genetic hypertension remains unclear. This study was conducted to investigate GABAA receptor binding in several brain regions of spontaneously hypertensive (SHR) rats during development of hypertension. ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)00164-v
更新日期：1995-01-01 00:00:00
abstract：:An enhanced production of hypothalamic neuropeptide Y (NPY) now appears to underlie a number of hyperphagia syndromes. However, the role of NPY in the hyperphagia induced by hypothalamic lesions has not yet been explored. Here, hypothalamic lesions were induced in mice by administration of goldthioglucose (GTG) and br...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90071-5
更新日期：1992-09-01 00:00:00
abstract：:The brain serotoninergic (5HTergic) system of epileptic subjects can influence their vulnerability to stress. We studied the putative dependency of 5HT neurotransmission parameters on emotional stress, and the presence, types and severity of seizures using rats with genetic generalized (absence and/or audiogenic) epil...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2006.03.008
更新日期：2006-05-31 00:00:00
abstract：:The topographical distribution of glutamate uptake, GABA uptake, and GAD activity was studied in caudal, intermediate and rostral areas of the nucleus of the solitary tract (NTS), dorsal motor nucleus of the vagus (DMN) and the of the solitary tract (NTS), dorsal motor nucleus of the vagus (DMN) and the hypoglossal nu...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(85)90176-5
更新日期：1985-01-01 00:00:00
abstract：:Medial preoptic axons were traced into the diagonal band of Broca and septum, particularly lateral septum. Other labeled fibers could be followed dorsally from medial preoptic area injections adjacent to the stria medullaris, and in the periventricular fiber system and the stria terminalis and its bed nucleus. The ant...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(80)90167-7
更新日期：1980-05-01 00:00:00
abstract：:In pigeons, the tectofugal system is functionally as well as structurally lateralized. So for example the right nucleus rotundus is less modulated by right forebrain influences than the left nucleus rotundus by the left ones. This functional lateralization pattern may depend on a dynamic balance between left and right...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2007.10.031
更新日期：2008-03-18 00:00:00
abstract：:It was found that neurons in the posterior orbitofrontal cortex, area 13, of the rhesus monkey were activated from self-stimulation electrodes (in 142 of 168 possible instances), and that neurons in the anterior orbitofrontal areas were much less likely to be activated from the self-stimulation electrodes (in only 28 ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(80)90181-1
更新日期：1980-03-01 00:00:00
abstract：:Epigenetic processes are involved in regulation of cell functions and survival, but their role in responses of neurons and glial cells to oxidative injury is insufficiently explored. Here, we studied the role of DNA methylation and histone deacetylation in reactions of neurons and surrounding glial cells to photodynam...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2014.01.005
更新日期：2014-03-01 00:00:00
abstract：:Various hypotheses are reviewed concerning the mechanisms of feeding induced by insulin or 2DG. New data are presented to show that elevated plasma ketone levels are not sufficient to suppress 2DG feeding, suggesting that nourishment of the brain either does not occur or is not sufficient to stop 2DG feeding. We find ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(85)90111-x
更新日期：1985-06-01 00:00:00
abstract：:Complex interactions between genetic and environmental factors exert a sustained influence on the pathogenesis of schizophrenia (SCZ). Adolescent social isolation is regarded as a typical paradigm for SCZ. However, the underlying pathological mechanisms are not fully understood. In this study, adolescent Sprague-Dawle...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.08.013
更新日期：2018-09-01 00:00:00
abstract：:Parkinson's disease (PD) is mostly known as a dopamine deficiency syndrome due the structural and functional changes in striatal projection neurons. However, studies have considered this pathology as a multi-systemic disease in which the neurodegenerative process extends beyond the dopaminergic system. Therefore, the ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2019.01.009
更新日期：2019-03-01 00:00:00
abstract：:The role of several hippocampal innervations in the sensitivity to barbital-induced narcosis was studied in selected mice strains. The outbred and inbred mouse strains HS/lgb, SABRA/HUC, C57BL, CBA/LAC, and BALB/c were tested for barbital-induced sleep (315 mg/kg). The relatively short sleeping HS/lbg (HS) and the lon...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(95)00077-r
更新日期：1995-01-01 00:00:00
abstract：:Gamma-aminobutyric acid (GABA) is an important inhibitory neurotransmitter in the mature brain. At an early developmental period, it acts in an excitatory manner that influences many processes of proliferation, migration, and differentiation of the neurons. Previous evidence indicated that manipulation of the GABAergi...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2021.01.006
更新日期：2021-01-10 00:00:00
abstract：:Chemical studies have demonstrated that peptides such as the encephalitogenic (EAE) peptide of myelin basic protein (MBP) and luteinizing hormone-releasing hormone (LHRH) can bind serotonin (5-hydroxytryptamine, 5-HT) in vitro. The present research was undertaken to determine whether such binding interferes with 5-HT ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(90)90176-z
更新日期：1990-12-01 00:00:00
abstract：:We previously reported that systemic treatment with a noncompetitive antagonist affecting the NMDA subtype of excitatory amino acid (EAA) receptor, MK-801, inhibits photic induction of Fos-like immunoreactivity (Fos-lir) in the hamster suprachiasmatic nucleus (SCN). Because MK-801 blocks the Ca2+ channel associated wi...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(92)90269-4
更新日期：1992-05-01 00:00:00
abstract：:Although neural occlusion has been suggested to occur between the central and reflex mechanisms increasing arterial pressure, evidence consistent with this phenomenon is lacking. To assess the possibility of neural occlusion we recorded, in chloralose-anesthetized cats, the pressor responses to statically contracting ...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(89)90058-0
更新日期：1989-02-01 00:00:00
abstract：:Several hypotheses have been proposed to explain why some neurological patients fail to recognise objects from unusual views: that it results from difficulty identifying an object's principal axis when it is foreshortened, identifying an object when landmark features are occluded, or an inability to rotate mental imag...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(96)00148-7
更新日期：1996-01-01 00:00:00
abstract：:Depression is associated with uncontrolled diabetes, which indicates a lack of insulin effect, yet the role of the insulin receptor in mediating depression is not clearly established because insulin receptors are not required for glucose entry into the brain. However, insulin receptors are important for brain function...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.09.017
更新日期：2018-10-01 00:00:00
abstract：:Human autopsy brain tissue is widely used to study neurodegenerative diseases such as Alzheimer's, Parkinson's and other diseases. However, when it comes to an evaluation of data obtained from such tissue, it is essential to consider potential postmortem effects on protein composition, posttranslational modification a...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2016.01.005
更新日期：2016-03-01 00:00:00
abstract：:We quantitatively analyzed the developing prospective neural and non-neural ectoderm during chicken gastrulation on semithin transverse sections. At stage PS8 (primitive streak stage 8 of Lopez-Sanchez et al. [C. Lopez-Sanchez, L. Puelles, V. Garcia-Martinez, L. Rodriguez-Gallardo, Morphological and molecular analysis...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2007.10.061
更新日期：2008-03-18 00:00:00
abstract：:Both the lateral hypothalamus (LH) and reticular thalamus (RT) have been implicated in the integration of a variety of vital functions. To determine relevant connections more specifically between cells of these two regions in the rat, functional neurophysiological and horseradish peroxidase (HRP) histochemical techniq...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(94)90083-3
更新日期：1994-01-01 00:00:00
abstract：:Body weight changes and food and water intakes were studied in CFY male and female rats after kainic acid (KA)-induced destruction of the lateral hypothalamic area (LH) or the ventromedial hypothalamic nucleus (VMH). To minimize the extent of damages, KA was iontophoretically applied by means of glass micropipettes. K...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(91)90199-t
更新日期：1991-01-01 00:00:00
abstract：:Autoradiography was employed to investigate the efferent projections from the lateral hypothalamus in the guinea pig. Lateral hypothalamic axons were traced along the medial forebrain bundle in both ascending and descending directions. Anteriorly, the label was traced along the medial forebrain bundle in both ascendin...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(83)90170-3
更新日期：1983-09-01 00:00:00
abstract：:The expression of dopamine by primary sensory neurons and their peripheral projections was studied in the chick dorsal root ganglion by means of immunocytochemical procedures. Within the sensory neurons, dopamine immunoreactivity is first expressed by 0.8% of cells at E10 and reaches a percentage of 5.6% before hatchi...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90248-a
更新日期：1993-01-01 00:00:00
abstract：:Proneuropeptide Y (proNPY) is posttranslationally processed to NPY(1-36)amide and the C-terminal flanking peptide of NPY (CPON). Antisera directed against the N-terminal part of NPY, CPON, or CysNPY(32-36)amide were used to identify peptide fragments processed from proNPY in biopsies of human frontal cortical specimen...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/0361-9230(93)90235-4
更新日期：1993-01-01 00:00:00
abstract：:Wnt signaling plays an important role in the adult brain function and its dysregulation has been implicated in some neurodegenerative pathways. Despite the functional role of the Wnt signaling in adult neural circuits, there is currently no evidence regarding the relationships between exogenously Wnt signaling activat...
journal_title：Brain research bulletin
pub_type： 杂志文章
doi：10.1016/j.brainresbull.2018.03.008
更新日期：2018-05-01 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
