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1.

001-es BibID:BIBFORM029080
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Development of calbindin-D28k immunoreactive neurons in the embryonic chick lumbosacral spinal cord / Miklós Antal, Erika Polgár
Dátum:1993
Megjegyzések:The development of immunoreactivity for the calcium-binding protein calbindin-D28k (CaB) was investigated in the embryonic and hatched chick lumbosacral spinal cord. CaB-immunoreactive neurons were revealed in the dorsal and ventral horns as well as in the intermediate grey matter from early stages of neuronal development. CaB immunoreactivity was first detected in large neurons in the presumptive dorsal horn at embryonic day 5, while small neurons in the lateral dorsal horn were the last to appear, at embryonic day 10. We have identified and traced the morphological maturation of six CaB-immunoreactive cell groups, three in the dorsal horn and three in the ventral horn. In the dorsal horn these groups were (1) large neurons in the lateral dorsal horn (laminae I and IV), (2) small neurons in the lateral dorsal horn (lamina II), and (3) small neurons in the medial dorsal horn (lamina III). All three groups were present throughout the entire length of the lumbosacral spinal cord and showed persistent CaB immunoreactivity. In the ventral horn, CaB-immunoreactive neurons were classified into the following three categories: (1) Neurons dorsal to the lateral motor column (lamina VII). These neurons were present exclusively in the upper lumbosacral segments (LS1-3), and they showed steady CaB immunoreactivity during their maturation. (2) Neurons at the dorsomedial aspect of the lateral motor column (at the border of laminae VII and IX). This population of neurons was characteristic of the lower segments of the lumbosacral cord (LS5-7) and presented transient CaB expression. (3) Neurons within the lateral motor column (lamina IX). These neurons were dispersed throughout the length of the lumbosacral spinal cord. They were three to four times more numerous in the upper than in the lower lumbosacral segments, and their numbers declined throughout LS1-7 as the animal matured. The characteristic features of the development of neurons immunoreactive for CaB are discussed and correlated with previous neuroanatomical and physiological studies concerning sensory and motor functions of the developing chick spinal cord.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) észült közlemény
Megjelenés:European Journal of Neuroscience. - 5 : 7 (1993), p. 782-794. -
További szerzők:Polgár Erika
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2.

001-es BibID:BIBFORM029094
Első szerző:Antal Miklós (orvos, anatómus)
Cím:Expression of hyperpolarization-activated and cyclic nucleotide-gated cation channel subunit 2 in axon terminals of peptidergic nociceptive primary sensory neurons in the superficial spinal dorsal horn of rats / Antal, M., Papp, I., Bahaerguli, N., Veress, G., Vereb, G.
Dátum:2004
Megjegyzések:Hyperpolarization-activated cyclic nucleotide-gated cation channel proteins (HCN1-4), which are potentially able to modulate membrane excitability, are abundantly expressed by neurons in spinal dorsal root ganglia (DRG). In the present experiment, we investigated whether HCN2 protein is confined exclusively to the perikarya of DRG neurons or is transported from the somata to the central axons of DRG neurons that terminate in the spinal dorsal horn. Using immunohistochemical methods, we have demonstrated that laminae I-IIo of the superficial spinal dorsal horn of the adult rat spinal cord show a strong punctate immunoreactivity for HCN2. Dorsal rhizotomy resulted in a complete loss of immunostaining in the dorsal horn, suggesting that HCN2 is confined to axon terminals of primary afferents. In double labelling immunohistochemical studies, we have also shown that HCN2 widely co-localizes with calcitonin gene-related peptide, but is almost completely segregated from isolectin-B4 binding, indicating that HCN2 is primarily expressed in peptidergic nociceptive primary afferents. The expression of HCN2 in central terminals of peptidergic primary afferents was also verified with electron microscopy. Utilizing the pre-embedding nanogold method, we found that HCN2 is largely confined to axon terminals with dense-core vesicles. Within these terminals, some of the silver grains marking the accurate location of HCN2 molecules were associated with the cell membrane, and others were scattered in the axoplasm. Within the cell membrane, HCN2 was found almost exclusively in extrasynaptic locations. The results suggest that HCN2 may contribute to the modulation of membrane excitability of nociceptive primary afferent terminals in the spinal dorsal horn.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:The European Journal of Neuroscience 19 : 5 (2004), p. 1336-1342. -
További szerzők:Papp Ildikó (1976-) (biológus) Bahaerguli, Niyazi Veress Gábor (1971-) (neurobiológus) Vereb György (1965-) (biofizikus, orvos)
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3.

001-es BibID:BIBFORM029495
Első szerző:Birinyi András (anatómus, neurobiológus)
Cím:The extent of the dendritic tree and the number of synapses in the frog motoneuron / Birinyi A., Antal M., Wolf E., Székely G.
Dátum:1992
ISSN:0953-816X
Megjegyzések:Frog motoneurons were intracellularly labelled with cobaltic lysine in the brachial and the lumbar segments of the spinal cord, and the material was processed for light microscopy in serial sections. With the aid of the neuron reconstruction system NEUTRACE, the dendritic tree of neurons was reconstructed and the length and surface area of dendrites measured. The surface of somata was determined with the prolate - oblate average ellipsoid calculation. Corrections were made for shrinkage and for optical distortion. The mean surface area of somata was 6710 microm2; lumbar motoneurons were slightly larger than brachial motoneurons. The mean length of the combined dendritic tree of brachial neurons was 29 408 microm and that of lumbar neurons 46 806 microm. The mean surface area was 127 335 microm2 in brachial neurons, and 168 063 microm2 in lumbar neurons. The soma - dendrite surface area ratio was 3 - 5% in most cases. Dendrites with a diameter of </= 1.0 microm constituted approximately 75% of the combined dendritic length in most of the neurons. Unlike in the cat, there was no correlation between the size of stem dendrites and the extent of daughter branches. From the synaptic density estimated in earlier electron microscope investigations of frog motoneuron dendrites (Antal et al., J. Neurocytol., 15, 303 - 310, 1986; 21, 34 - 49, 1992), and from the present data, the number of synapses on the dendritic tree was calculated. The calculations indicated 26 949 synapses on the smallest and 61 519 synapses on the largest neuron if the synaptic density was multiplied by the length of the dendritic tree. If the synaptic density was multiplied by the surface area of the dendritic tree the calculation yielded 23 337 synapses for the smallest and 60 682 synapses for the largest neuron. More than 60% of the combined surface area of dendrites was >600 microm from the soma. This suggests that about two-thirds of the synapses impinged upon distant dendrites >600 microm from the soma. The efficacy of synapses at these large distances is investigated on model neurons in the accompanying paper
Tárgyszavak:Orvostudományok Természettudományok Biológiai tudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:European Journal Of Neuroscience. - 4 : 11 (1992), p. 1003-1012. -
További szerzők:Antal Miklós (1951-) (orvos, anatómus) Wolf Ervin (1961-) (fizikus, neurobiológus) Székely György (1926-2017) (neurobiológus)
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4.

001-es BibID:BIBFORM032423
Első szerző:Girard, F.
Cím:Gene expression analysis in the parvalbumin-immunoreactive PV1 nucleus of the mouse lateral hypothalamus / Girard, F., Meszar, Z., Marti, C., Davis, F. P., Celio, M.
Dátum:2011
ISSN:0953-816X
Megjegyzések:A solitary, elongated cluster of parvalbumin-immunoreactive neurons has been previously observed in the rodent ventrolateral hypothalamus. However, the function of this so-called PV1 nucleus is unknown. In this article, we report the results of an unbiased, broad and in-depth molecular characterization of this small, compact group of neurons. The Allen Brain Atlas database of in situ hybridization was screened in order to identify genes expressed in the PV1-nucleus-containing area of the hypothalamus, and those that might be co-expressed with parvalbumin. Although GABA is the principal neurotransmitter in parvalbumin-expressing cells in various other brain areas, we found that PV1 neurons express the vesicular glutamate transporter (VGlut) VGlut2-encoding gene Slc17a6 and are negative for the glutamic acid decarboxylase 1 (GAD1) gene. These cells also express the mRNA for the neuropeptides Adcyap1 and possibly Nxph4, express several types of potassium and sodium channels, are under the control of the neurotransmitter acetylcholine, bear receptors for the glial-derived neurotrophic factor, and produce an extracellular matrix rich in osteopontin. The PV1 nucleus is thus composed of glutamatergic nerve cells, expressing some typical markers of long-axon, projecting neurons (e.g. VGlut2), but also co-expressing genes typical of short-axon GABA neurons (e.g. a variety of potassium channels). Hence, neurons of the PV1 nucleus combine physiological characteristics of interneurons with those of projection neurons.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal Of Neuroscience. - 34 : 12 (2011), p. 1934-1943. -
További szerzők:Mészár Zoltán Mihály (1977-) (agrármérnök) Marti, C. Davis, F. P. Celio, M.
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5.

001-es BibID:BIBFORM008789
Első szerző:Hegyi Zoltán (molekuláris biológus)
Cím:Neuronal and glial localization of the cannabinoid-1 receptor in the superficial spinal dorsal horn of the rodent spinal cord / Zoltán Hegyi, Gréta Kis, Krisztina Holló, Catherine Ledent, Miklós Antal
Dátum:2009
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal of Neuroscience. - 30 : 2 (2009), p. 251-262. -
További szerzők:Kis Gréta (1979-) (környezetkutató) Holló Krisztina (1967-) (vegyész) Ledent, Catherine Antal Miklós (1951-) (orvos, anatómus)
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6.

001-es BibID:BIBFORM029091
Első szerző:Odeh, Francis
Cím:The projections of the midbrain periaqueductal gray to the pons and medulla oblongata in rats / Odeh F., Antal M.
Dátum:2001
Megjegyzések:It is now established that stimulation of the ventrolateral midbrain periaqueductal grey (PAG) evokes inhibition of nociceptive spinal neurons, which results in analgesia and a powerful attenuation of pain behaviour. It is postulated that the PAG exerts this inhibitory effect on spinal nociceptive functions through the activation of descending serotonergic and noradrenergic pathways that arise from the rostral ventromedial medulla (RVM) and pontine noradrenergic nuclei. To investigate the neuroanatomical substrate of this functional link between the PAG and RVM, as well as the pontine noradrenergic nuclei in the rat, we labelled axons that project from the ventrolateral PAG to various regions of the pons and medulla oblongata using the anterograde tracing substance, Phaseolus vulgaris leucoagglutinin. We demonstrated that some of PAG efferents really do terminate in the RVM and pontine noradrenergic nuclei, but a substantial proportion of them project to the intermediate subdivision of the pontobulbar reticular formation. Combining the axonal tracing with serotonin- and tyrosine-hydroxylase-immunohistochemistry, we also found that, in contrast to previous results, PAG efferents make relatively few appositions with serotonin- and tyrosine-hydroxylase-immunoreactive neurons in the RVM and pontine noradrenergic nuclei; most of them terminate in nonimmunoreactive territories. The results suggest that the ventrolateral PAG may activate a complex pontobulbar neuronal assembly including neurons in the intermediate subdivision of the pontobulbar reticular formation, serotonin- and tyrosine-hydroxylase-immunoreactive and nonimmunoreactive neurons in the RVM and pontine noradrenergic nuclei. This pontobulbar neural circuitry, then, may mediate the PAG-evoked activities towards the spinal dorsal horn resulting in the inhibition of spinal nociceptive functions.
Tárgyszavak:Orvostudományok Elméleti orvostudományok magyar nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal of Neuroscience. - 14 : 8 (2001), p. 1275-1286. -
További szerzők:Antal Miklós (1951-) (orvos, anatómus)
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7.

001-es BibID:BIBFORM029097
Első szerző:Papp Ildikó (biológus)
Cím:Hyperpolarization-activated and cyclic nucleotide-gated cation channel subunit 2 ion channels modulate synaptic transmission from nociceptive primary afferents containing substance P to secondary sensory neurons in laminae I-IIo of the rodent spinal dorsal horn / Papp I., Szűcs P., Holló K., Erdélyi F., Szabó G., Antal M.
Dátum:2006
Megjegyzések:We have previously demonstrated that hyperpolarization-activated and cyclic nucleotide-gated cation channel subunit 2 (HCN2) is expressed by terminals of peptidergic nociceptive primary afferents in laminae I-IIo of the rat spinal dorsal horn. In this study, we investigated the possible neurotransmitters and postsynaptic targets of these HCN2-expressing primary afferent terminals in the superficial spinal dorsal horn by using immunocytochemical methods. We demonstrated that HCN2 widely colocalizes with substance P (SP), and that HCN2-positive terminals that are also immunoreactive for SP form serial close appositions with dendrites and perikarya of neurokinin 1 receptor-immunoreactive neurons. It was also found that HCN2-immunoreactive terminals are frequently apposed to neurons that are immunoreactive for calbindin, mu-opioid receptor and the alfa-amino-3-hydroxy-5-methylisoxazole-4-propionate receptor subunit GluR2, markers for excitatory interneurons. Investigating HCN2 immunoreactivity in glutamic acid decarboxylase 65-green fluorescent protein transgenic mice, we found that HCN2-positive terminals occasionally also contact cells that contain an isoform of glutamic acid decarboxylase (glutamic acid decarboxylase 65), a marker for GABAergic inhibitory neurons. Application of ZD7288, an antagonist of HCN channels, onto neurons that were recorded in spinal cord slices with whole-cell patch-clamp electrodes reduced the number of monosynaptic excitatory postsynaptic potentials evoked by electrical stimulation of primary afferents at nociceptive intensities. The results suggest that HCN2 may contribute to the modulation of membrane excitability of SP-containing nociceptive primary afferent terminals, may increase the reliability of synaptic transmission from primary afferents to secondary sensory neurons and thus may play a role in the fine-tuning of pain transmission from nociceptive primary afferents to neurons in the spinal dorsal horn.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal of Neuorscience. - 24 : 5 (2006), p. 1341-1352. -
További szerzők:Szűcs Péter (1974-) (kutatóorvos) Holló Krisztina (1967-) (vegyész) Erdélyi Ferenc Szabó Gábor (budapesti orvos) Antal Miklós (1951-) (orvos, anatómus)
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8.

001-es BibID:BIBFORM013294
Első szerző:Papp Ildikó (biológus)
Cím:Plasticity of hyperpolarization-activated and cyclic nucleotid-gated cation channel subunit 2 expression in the spinal dorsal horn in inflammatory pain / Ildikó Papp, Krisztina Holló, Miklós Antal
Dátum:2010
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Egészség- és Környezettudomány
Megjelenés:The European Journal of Neuroscience. - 32 : 7 (2010), p. 1193-1201. -
További szerzők:Holló Krisztina (1967-) (vegyész) Antal Miklós (1951-) (orvos, anatómus)
Pályázati támogatás:TÁMOP-4.2.1/B-09/1/KONV-2010-0007
TÁMOP
A gerincvelő felületes hátsó szarvi neuronhálózatok szerveződése és plaszticitása krónikus gyulladásos és neuropátiás fájdalom állapotokban
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9.

001-es BibID:BIBFORM029521
Első szerző:Sathianathan, Vivian
Cím:Insulin induces cobalt uptake in a subpopulation of rat cultured primary sensory neurons / Sathianathan Vivian, Avelino Antonio, Charrua Ana, Santha Peter, Matesz Klara, Cruz Francisco, Nagy Istvan
Dátum:2003
ISSN:0953-816X
Megjegyzések:Previous findings show that both the vanilloid receptor 1 and the insulin receptor are expressed on small primary sensory neurons. As insulin evokes activity in second messengers which could induce opening of the vanilloid receptor 1, we examined, by using the cobalt-uptake technique, whether or not insulin can activate cultured rat primary sensory neurons through activating the vanilloid receptor 1. Capsaicin (50, 100 and 500 nm) induced concentration-dependent labelling in primary sensory neurons. Preincubation of cells in insulin (10 micromoles) for 10 min followed by a 2-min wash did not produce significant change in the capsaicin-induced labelling. Coapplication of insulin (10 micromoles) with capsaicin, however, potentiated the 50 and 100 nm capsaicin-evoked staining. Insulin itself also produced cobalt labelling in a concentration-dependent manner. The size-frequency distributions of neurons showing capsaicin- or insulin-induced cobalt accumulation were similar. The insulin-induced cobalt labelling was significantly reduced by the tyrosine kinase inhibitor, tyrphostin AG1024, the vanilloid receptor 1 antagonists, ruthenium red and capsazepine, the protein kinase inhibitor, staurosporine and the phospholipase C inhibitor neomycin. Double immunostaining of cultured primary sensory neurons and sections from dorsal root ganglia revealed that about one-third of the cells coexpress the insulin receptor and vanilloid receptor 1. These findings suggest that insulin activates a subpopulation of primary sensory neurons, probably through phosphorylation- and/or phosphatidylinositol(4,5)biphosphate hydrolysis-evoked activation of the vanilloid receptor 1. Although the insulin-induced activation of vanilloid receptor 1 seems to be a short-lived effect in vitro, in vivo it might play a role in the development of burning pain sensation in hyperinsulinism.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal Of Neuroscience 18 : 9 (2003), p. 2477-2486. -
További szerzők:Avelino, Antonio Charrua, Ana Sántha Péter Matesz Klára (1949-) (anatómus, neurobiológus) Cruz, Francisco Nagy István (orvos)
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10.

001-es BibID:BIBFORM029092
Első szerző:Szűcs Péter (kutatóorvos)
Cím:Neurons with distinctive firing patterns, morphology and distribution in laminae V-VII of the neonatal rat lumbar spinal cord / Szűcs P., Odeh F., Szokol K., Antal M.
Dátum:2003
Megjegyzések:It is generally accepted that neurons in the ventral spinal grey matter, a substantial proportion of which can be regarded as constituents of the spinal motor apparatus, receive and integrate synaptic inputs arising from various peripheral, spinal and supraspinal sources. Thus, a profound knowledge concerning the integrative properties of interneurons in the spinal ventral grey matter appears to be essential for a fair understanding of operational principles of spinal motor neural assemblies. Using the whole cell patch clamp configuration in a correlative physiological and morphological experimental approach, here we demonstrate that the intrinsic membrane properties of neurons vary widely in laminae V-VII of the ventral grey matter of the neonatal rat lumbar spinal cord. Based on their firing patterns in response to depolarizing current steps, we have classified the recorded neurons into four categories: 'phasic', 'repetitive', 'single' and 'slow'. Neurons with firing properties characteristic of the 'phasic', 'repetitive' and 'single' cells have previously been reported also in the superficial and deep spinal dorsal horn, but this is the first account in the literature in which 'slow' neurons have been recovered and described in the spinal cord. The physiological heterogeneity in conjunction with the morphological correlation and distribution of neurons argues that different components of motor neural assemblies in the spinal ventral grey matter possess different signal processing characteristics.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:European Journal of Neuroscience. - 17 : 3 (2003), p. 537-544. -
További szerzők:Odeh, Francis Szokol Karolina Antal Miklós (1951-) (orvos, anatómus)
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11.

001-es BibID:BIBFORM029497
Első szerző:Wolf Ervin (fizikus, neurobiológus)
Cím:Simulation of the effect of synapses : the significance of the dendritic diameter in impulse propagation / Wolf E., Birinyi A., Székely G.
Dátum:1992
ISSN:0953-816X
Megjegyzések:The effectiveness of synapses at various sites of the dendritic tree was studied using a segmental cable model with a program developed by Hines (Int. J. Biomed. Comput., 24, 55 - 68, 1989). The model rendered possible a high-fidelity simulation of the dendritic geometry of a frog motoneuron described in the accompanying paper (Birinyi et al., Eur. J. Neurosci., 1003 - 1012, 1992). The model was used in the passive membrane mode and the synaptic activity was simulated with current injections into large and small diameter dendrites at proximal and distal locations. Synaptic efficiency was defined by the charge transfer ratio expressed as the proportion of the injected current which appeared at the soma. The charge transfer ratio was determined with uniform and non-uniform distribution of specific membrane resistance over the soma - dendrite surface while the diameter of selected dendrite segments changed. The best charge transfer ratio was found with the largest dendrite membrane resistance, and the maximum efficiency of synaptic activity appeared at the original size of the dendrite segment stimulated. The amount of current that flowed in the proximal and distal directions from the segment stimulated depended on the diameter of that segment. The increase in diameter of proximal dendrites increased synaptic efficiency on distal dendrites, whereas the reverse caused a decline in synaptic efficiency on proximal dendrites. In addition to the diameter of dendrites, the arborization pattern also played a significant role in this mechanism. It is concluded that the cellulipetal increase in dendrite diameter greatly increases synaptic efficiency.
Tárgyszavak:Orvostudományok Természettudományok Biológiai tudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:European Journal Of Neuroscience. - 4 : 11 (1992), p. 1013-1021. -
További szerzők:Birinyi András (1960-) (anatómus, neurobiológus) Székely György (1926-2017) (neurobiológus)
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12.

001-es BibID:BIBFORM029498
Első szerző:Wolf Ervin (fizikus, neurobiológus)
Cím:The influence of premotor interneurone populations on the frequency of the spinal pattern generator for swimming in Xenopus embryo: a simulation study / Wolf E., Roberts A.
Dátum:1995
ISSN:0953-816X
Megjegyzések:Our aim was to test the hypothesis that the frequency of neuronal rhythm-generating networks is partly controlled by the size of the active premotor interneuron population. We have tested possible mechanisms for frequency changes in a population model of the Xenopus laevis embryo spinal rhythm-generating networks for swimming. After initiation by a brief sensory excitation, the frequency of swimming activity decreases to a steady level determined by the properties of the 24 interneurons and their connections. The initial frequency decrease was dependent on the time-course of initiating sensory synaptic excitation. When some premotor excitatory interneurons were given weaker synaptic connections to reflect the variability in the spinal cord, they could drop out and stop firing during the initial frequency decrease while swimming activity continued. If the synaptic input of such weak excitatory interneurons was graded finely, they could drop out consecutively. This led to further decreases in the level of tonic excitation and in network frequency which depended on the number, type and distribution of excitatory interneurons that stopped firing. Silent weak excitatory interneurons could be recruited by a second sensory excitation and cause an increase in tonic depolarization and frequency which outlasted the sensory input. Such recruitment could occur on both sides after local sensory stimulation to only one region or one side of the model. We conclude that these computer simulations support the hypothesis that premotor interneuron drop-out and recruitment is one mechanism which can control frequency in a locomotor central pattern generator.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
egyetemen (Magyarországon) készült közlemény
Megjelenés:European Journal Of Neuroscience. - 7 : 4 (1995), p. 671-678. -
További szerzők:Roberts, Alan
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