Abstract:
:The disector method was used to estimate the numerical density of neurons (number per unit volume) and their actual number per column (number under a given area of pial surface), in the occipital (monocular segment of the primary visual area, Oc1M), the parietal (somatosensory barrelfield area, Par1) and the frontal cortex (primary motor area, Fr1) of adult rat. Values were first obtained for all neurons in each layer, and then for GABA neurons as identified with postembedding immunocytochemistry on semithin sections. The numerical density of neurons in the frontal cortex (34,000/mm3) was significantly lower than in the two other neocortical areas (occipital: 52,000; parietal: 48,000/mm3). The GABA population showed a similar difference and consequently represented an equivalent proportion of total (15%) in the three cortical areas. Across layers, there was an alternate distribution of low and high density of neurons from layers II-III to VI in the three cortical areas, with the highest density in layer IV of the two sensory areas. The laminar changes in density of the GABA neurons were not as pronounced as those of the overall population. Consequently, the layers with the highest overall neuronal densities tended to have a lower proportion of GABA neurons and vice versa. There were more neurons under 1 mm2 of surface in the parietal (90,000) than the occipital or the frontal cortex (71,000), which was also true of the GABA neurons. The greater number of neurons per column in the parietal cortex was mostly imputable to layer IV, the main recipient of thalamic axons.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Brain Resjournal_title
Brain researchauthors
Beaulieu Cdoi
10.1016/0006-8993(93)90884-psubject
Has Abstractpub_date
1993-04-23 00:00:00pages
284-92issue
1-2eissn
0006-8993issn
1872-6240pii
0006-8993(93)90884-Pjournal_volume
609pub_type
杂志文章相关文献
BRAIN RESEARCH文献大全abstract::We have shown earlier that nicotinic agonists induce the release of noradrenaline from chick sympathetic neurons in culture in two ways: (a) by activating the postsynaptic nicotinic receptors on nerve cell bodies, giving rise to spreading electrical activity and opening of voltage operated calcium channels in neuronal...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(96)00876-1
更新日期:1996-11-18 00:00:00
abstract::Huntington's disease (HD) is a fatal, genetic, neurodegenerative disorder characterized by deficits in motor and cognitive function. Here, we have quantitatively characterized motor deficiencies and dopamine release dynamics in transgenic HD model rats. Behavioral analyses were conducted using a newly-developed force-...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2012.02.042
更新日期:2012-04-23 00:00:00
abstract::Calcium currents were studied in morphologically identified pyramidal and stellate neurons acutely isolated from layer II/III of rat entorhinal cortex, using the whole-cell patch-clamp configuration. The peak amplitude of high-voltage activated current (HVA) measured at +10 mV was not different in both neuron populati...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(98)01234-7
更新日期:1999-01-23 00:00:00
abstract::The 'wobbler' mutant mouse can be recognized at about 4 weeks of age by its tremor and atrophy of forelimb muscles. In addition to degeneration of spinal motoneurons, especially in cervical spinal cord, selected bulbar motoneurons have also been reported to degenerate in the mutant. We examined a cranial motor nucleus...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(87)91363-1
更新日期:1987-02-24 00:00:00
abstract::We examined the effects of nicotinic drugs on the metabolites of [3H]dopamine (DA) released from rat striatal synaptosomes in comparison with the effects of high K+ and methamphetamine stimulation. The pattern of outflow of [3H]DA and its metabolites induced by nicotine stimulants, acetylcholine (ACh), nicotine and lo...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(83)90204-4
更新日期:1983-11-21 00:00:00
abstract::Axotomy produced an increase in the spike width and a decrease in amplitude of the afterhyperpolarization which followed the action potential in C-cells of bullfrog sympathetic ganglia. Although no change in B-cell conduction velocity was noted, C-cell conduction velocity increased significantly and approached that of...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(87)80044-6
更新日期:1987-04-28 00:00:00
abstract::Impaired learning has been shown as a consequence of isolation-rearing in a variety of paradigms. However, there are situations in which learning in isolation-reared rats is enhanced or unimpaired compared to socially reared rats. The present experiments investigated the effects of isolation rearing on place navigatio...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)01578-7
更新日期:1996-04-09 00:00:00
abstract::The immunohistochemical studies on a peroxisomal enzyme, catalase, were done on brains from human fetuses to adults. The catalase-positive neurons appeared in the basal ganglia, thalamus and cerebellum at 27-28 weeks of gestation, and in the frontal cortex at 35 weeks. They then increased in number with gestational ag...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(91)90314-l
更新日期:1991-08-16 00:00:00
abstract::The morphological features and distribution of luteinizing hormone-releasing hormone (LHRH)-immunoreactive cell bodies and fibers of the hypothalamic and the neighboring mesencephalic regions were studied in the normal newborn infant by immunohistochemistry. Within the hypothalamus, numerous LHRH-immunoreactive like (...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)90929-6
更新日期:1990-05-21 00:00:00
abstract::Beta-amyloid (Aβ)-mediated inflammation plays a critical role in the initiation and progression of Alzheimer׳s disease (AD). Anti-inflammatory treatment may provide therapeutic benefits. In this study, the effect of hydroxy-safflor yellow A (HSYA) on Aβ1-42-induced inflammation in AD mice was investigated and the unde...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2014.03.036
更新日期:2014-05-14 00:00:00
abstract::The development from primary to augmenting responses of somatosensory (SI) cortical area to low-frequency stimulation of the ventrobasal (VB) thalamus or white matter (WM) beneath SI in VB-lesioned preparations was studied by field potential analysis and extracellular unit recording. Compared to the major postsynaptic...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(81)90719-8
更新日期:1981-01-26 00:00:00
abstract::While adult mice receiving picrotoxin (PTX) alone responded with clonic and tonic-clonic seizures, this response was greatly suppressed for mice simultaneously injected with 2,3-butanedione monoxime (BDM). For example, 60% and 10% of the mice convulsed when injected (i.p.) with 3.0 mg/kg PTX alone or PTX plus 205 mg/k...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(95)00175-p
更新日期:1995-04-24 00:00:00
abstract::We examined the in vivo synthesis of brain phosphatidylcholine (PC) by the methylation of phosphatidylethanolamine (PE). [3H-methyl]methionine was infused i.c.v., by indwelling cannula, and brain samples were taken 0.5-18 h thereafter and assayed for [3H]PC, as well as for its biosynthetic intermediates [3H]phosphatid...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(87)90576-2
更新日期:1987-09-01 00:00:00
abstract::A water soluble benzodiazepine, clorazepate, has been used to establish the point of benzodiazepine proliferative arrest in the rat C6 glioma. Clorazepate inhibited C6 proliferation in a dose-dependent manner with an IC50 value of 280 microM, as judged by a nuclei counting procedure. Release of cells from a 48 h expos...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(92)91083-q
更新日期:1992-09-11 00:00:00
abstract::Intraocular injections of ethylcholine mustard aziridinium ion (AF64A) in the rat depressed retinal choline acetyltransferase (ChAT) activity in a dose-dependent manner without any significant change in the content of amino acid neurotransmitters GABA, glycine, aspartate and glutamate. ChAT reduction was already detec...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)91466-7
更新日期:1988-01-26 00:00:00
abstract::The epileptogenic properties of the mast cell degranulating peptide (MCD) have been investigated in the CA3 region of the hippocampal slice preparation. Brief (3-5 min) bath application of MCD (0.5-2 microM) to CA3 hippocampal neurones produced an enhancement of the spontaneous synaptic activity and the appearance of ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(88)91077-3
更新日期:1988-03-29 00:00:00
abstract::The changes in the excitability of lumbosacral spinothalamic neurons produced by activating afferents in the trigeminal nerve using electrical or mechanical stimuli was investigated in cats anesthetized with alpha-chloralose. In most spinothalamic neurons, weak electrical stimuli or step indentations of the skin of th...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(79)90776-5
更新日期:1979-11-16 00:00:00
abstract::The present study compared Fos expression in identified hypothalamic magnocellular neurons in lactating and non-lactating female rats submitted to acute haemorrhage or 24 h of water deprivation, stimuli that induce the release of both oxytocin and vasopressin. Quantitative analysis of preparations doubly immunostained...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(94)90809-5
更新日期:1994-10-31 00:00:00
abstract::We have investigated the influence of central noradrenergic and dopaminergic systems on the susceptibility of rats to seizures in the kainic acid (KA)-model of epilepsy. In the dose range of 0.75 to 10 mg/kg s.c., KA dose-dependently induced characteristic behavioural changes. Partial depletion of noradrenaline (NA) a...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(89)90219-9
更新日期:1989-08-28 00:00:00
abstract::Brain and anterior pituitary growth hormone (GH), thyroid-stimulating hormone (TSH) and luteinizing hormone (LH) were measured during fetal, neonatal, and pubertal life and into adulthood. Immunoassayable GH and TSH could be found in the fetal whole brain before their detection in the fetal pituitary. Developmental pa...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0165-3806(82)90186-9
更新日期:1982-08-01 00:00:00
abstract::Recently, the gene encoding the cerebrovascular and neuritic plaque amyloid, a pathologic stigma of Alzheimer's disease (AD), has been molecularly cloned and mapped to human chromosome 21, band q21. Changes in the brains of individuals with trisomy 21 (Down syndrome, DS) over 35 years of age closely resemble AD neurop...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0169-328x(87)90028-3
更新日期:1987-09-01 00:00:00
abstract::The present study aimed to evaluate the therapeutic potential of apocynin, an NADPH oxidase assembly inhibitor, on traumatic brain injury. Rat traumatic brain injury (TBI) was performed using a weight drop model. Apocynin (100mg/kg) was injected into the intraperitoneal space 15 min before TBI. Reactive oxygen species...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2012.08.032
更新日期:2012-10-24 00:00:00
abstract::Astrocytic gap junctions have been implicated in a variety of signaling pathways essential to normal brain function. However, no information exists on the prevalence of gap junction channels and their function in the aging brain. Here we have compared the expression of the two most abundant astrocytic gap junction pro...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(01)02258-2
更新日期:2001-05-18 00:00:00
abstract::Pro-social lying, which serves to benefit listeners, is considered more socially and morally acceptable than anti-social lying, which serves to harm listeners. However, it is still unclear whether the neural mechanisms underlying the moral judgment of pro-social lying differ from those underlying the moral judgment of...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2014.02.011
更新日期:2014-03-27 00:00:00
abstract::Adrenergic innervation of tibial and vagus nerves was studied after 1-16 weeks duration of streptozotocin (STZ)-induced diabetes in rats. Sucrose-phosphate glyoxylic acid (SPG) histochemistry and the formaldehyde-induced fluorescence (FIF) method were used to demonstrate adrenergic nerve fibers in the epi-perineurial ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(90)91095-x
更新日期:1990-04-09 00:00:00
abstract::The [14C]2-deoxy-D-glucose technique was used to test the effects of central muscarinic stimulation on local cerebral glucose utilization (LCGU) in rats. Systemic administration of the muscarinic agonist oxotremorine (OXO, 0.7 mg/kg, ip) increased LCGU in brain regions involved in motor function: the sensorimotor cort...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(81)91100-8
更新日期:1981-12-07 00:00:00
abstract::The relationship between changes in regional brain bioamine levels and the expression of intraspecies aggressive behavior was evaluated in two murine models. In one study, normal male mice were maintained either in aggregate (i.e., normal, intraspecies social behavioral controls) or isolated (i.e., developed, non-soci...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/s0006-8993(02)03963-x
更新日期:2003-02-14 00:00:00
abstract::Neurite formation in neurones isolated from adult molluscs in culture has been shown to depend on the total content of Ca in the cells, intracellular Ca2+ concentration, intracellular acid-alkaline balance, extracellular pH, and the capacity and composition of buffers. The neurones with a low total Ca content prior to...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(83)90546-2
更新日期:1983-10-03 00:00:00
abstract::The parafascicular thalamic nucleus (nPf) is a critical relay in the ascending system that mediates motor control in the central nervous system (CNS). Yet, little is known about whether or not the nPf is involved in the development of morphine dependence and withdrawal. In the present study, kainic acid was used to ch...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/j.brainres.2009.02.084
更新日期:2009-05-19 00:00:00
abstract::A quantitative freeze-fracture study of perivascular astrocytic processes in rat cerebral cortex disclosed rapid disintegration of orthogonal arrays of the intramembrane particles in acute global ischemia. The process apparently preceded the development of astrocytic swelling. ...
journal_title:Brain research
pub_type: 杂志文章
doi:10.1016/0006-8993(84)91348-9
更新日期:1984-05-21 00:00:00