The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform
J A L De La Iglesia - One of the best experts on this subject based on the ideXlab platform.
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Neurons of the medial cortex outer plexiform layer of the lizard podarcis hispanica golgi and immunocytochemical studies
The Journal of Comparative Neurology, 1994Co-Authors: J A L De La Iglesia, Francisco Jose Martinezguijarro, Candido LopezgarciaAbstract:The study of Golgi-impregnated lizard brains has revealed a scarce but heterogeneous Neuronal population in the outer plexiform layer of the medial cortex. Some of the Neuronal types detected here resemble the Neurons of the dentate molecular layer of the mammalian hippocampus. According to their morphology, five intrinsic Neuronal types have been clearly identified: short axon aspinous bipolar Neuron (type 1, or sarmentous Neuron), short axon aspinous juxtasomatic Neuron (type 2, or coral Neuron), short axon sparsely spinous Multipolar Neuron (type 3, or stellate Neuron), short axon sparsely spinous juxtasomatic Multipolar Neuron (type 4, or deep stellate Neuron, and sparsely spinous juxtasomatic horizontal Neuron (type 5, or couchant Neuron). Most Neuronal types were identified as γ-aminobutyric acid (GABA) and parvalbumin immunoreactive, and are thus probably involved in medial cortex inhibition. Moreover, a small fraction of them displayed s-endorphin immunoreactivity. The distribution of these Neuronal types is not uniform in the laminae of the outer plexiform layer. Type 1 (sarmentous) and type 3 (stellate) Neurons overlap the axonal field projection coming from the dorsal cortex and the thalamus, whereas types 4 (deep stellate) and 5 (couchant) Neurons overlap ipsi- and contralateral dorsomedial projection fields as well as raphe serotoninergic and opioid immunoreactive axonal plexi. Thus, these Neuronal types may be involved in the control of specific inputs to the medial cortex by presumably feed-forward inhibition; nevertheless, feed-back inhibition may also occur regarding type 4 (deep stellate) Neurons that extend deep dendrites to the zinc-rich bouton field.
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Neurons of the medial cortex outer plexiform layer of the lizard Podarcis hispanica: Golgi and immunocytochemical studies
The Journal of comparative neurology, 1994Co-Authors: J A L De La Iglesia, F.j. Martínez-guijarro, Carlos Lopez-garciaAbstract:The study of Golgi-impregnated lizard brains has revealed a scarce but heterogeneous Neuronal population in the outer plexiform layer of the medial cortex. Some of the Neuronal types detected here resemble the Neurons of the dentate molecular layer of the mammalian hippocampus. According to their morphology, five intrinsic Neuronal types have been clearly identified: short axon aspinous bipolar Neuron (type 1, or sarmentous Neuron), short axon aspinous juxtasomatic Neuron (type 2, or coral Neuron), short axon sparsely spinous Multipolar Neuron (type 3, or stellate Neuron), short axon sparsely spinous juxtasomatic Multipolar Neuron (type 4, or deep stellate Neuron), and sparsely spinous juxtasomatic horizontal Neuron (type 5, or couchant Neuron). Most Neuronal types were identified as gamma-aminobutyric acid (GABA) and parvalbumin immunoreactive, and are thus probably involved in medial cortex inhibition. Moreover, a small fraction of them displayed beta-endorphin immunoreactivity. The distribution of these Neuronal types is not uniform in the laminae of the outer plexiform layer. Type 1 (sarmentous) and type 3 (stellate) Neurons overlap the axonal field projection coming from the dorsal cortex and the thalamus, whereas types 4 (deep stellate) and 5 (couchant) Neurons overlap ipsi- and contralateral dorsomedial projection fields as well as raphe serotoninergic and opioid immunoreactive axonal plexi. Thus, these Neuronal types may be involved in the control of specific inputs to the medial cortex by presumably feed-forward inhibition; nevertheless, feed-back inhibition may also occur regarding type 4 (deep stellate) Neurons that extend deep dendrites to the zinc-rich bouton field.
Candido Lopezgarcia - One of the best experts on this subject based on the ideXlab platform.
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Neurons of the medial cortex outer plexiform layer of the lizard podarcis hispanica golgi and immunocytochemical studies
The Journal of Comparative Neurology, 1994Co-Authors: J A L De La Iglesia, Francisco Jose Martinezguijarro, Candido LopezgarciaAbstract:The study of Golgi-impregnated lizard brains has revealed a scarce but heterogeneous Neuronal population in the outer plexiform layer of the medial cortex. Some of the Neuronal types detected here resemble the Neurons of the dentate molecular layer of the mammalian hippocampus. According to their morphology, five intrinsic Neuronal types have been clearly identified: short axon aspinous bipolar Neuron (type 1, or sarmentous Neuron), short axon aspinous juxtasomatic Neuron (type 2, or coral Neuron), short axon sparsely spinous Multipolar Neuron (type 3, or stellate Neuron), short axon sparsely spinous juxtasomatic Multipolar Neuron (type 4, or deep stellate Neuron, and sparsely spinous juxtasomatic horizontal Neuron (type 5, or couchant Neuron). Most Neuronal types were identified as γ-aminobutyric acid (GABA) and parvalbumin immunoreactive, and are thus probably involved in medial cortex inhibition. Moreover, a small fraction of them displayed s-endorphin immunoreactivity. The distribution of these Neuronal types is not uniform in the laminae of the outer plexiform layer. Type 1 (sarmentous) and type 3 (stellate) Neurons overlap the axonal field projection coming from the dorsal cortex and the thalamus, whereas types 4 (deep stellate) and 5 (couchant) Neurons overlap ipsi- and contralateral dorsomedial projection fields as well as raphe serotoninergic and opioid immunoreactive axonal plexi. Thus, these Neuronal types may be involved in the control of specific inputs to the medial cortex by presumably feed-forward inhibition; nevertheless, feed-back inhibition may also occur regarding type 4 (deep stellate) Neurons that extend deep dendrites to the zinc-rich bouton field.
Carlos Lopez-garcia - One of the best experts on this subject based on the ideXlab platform.
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Neurons of the medial cortex outer plexiform layer of the lizard Podarcis hispanica: Golgi and immunocytochemical studies
The Journal of comparative neurology, 1994Co-Authors: J A L De La Iglesia, F.j. Martínez-guijarro, Carlos Lopez-garciaAbstract:The study of Golgi-impregnated lizard brains has revealed a scarce but heterogeneous Neuronal population in the outer plexiform layer of the medial cortex. Some of the Neuronal types detected here resemble the Neurons of the dentate molecular layer of the mammalian hippocampus. According to their morphology, five intrinsic Neuronal types have been clearly identified: short axon aspinous bipolar Neuron (type 1, or sarmentous Neuron), short axon aspinous juxtasomatic Neuron (type 2, or coral Neuron), short axon sparsely spinous Multipolar Neuron (type 3, or stellate Neuron), short axon sparsely spinous juxtasomatic Multipolar Neuron (type 4, or deep stellate Neuron), and sparsely spinous juxtasomatic horizontal Neuron (type 5, or couchant Neuron). Most Neuronal types were identified as gamma-aminobutyric acid (GABA) and parvalbumin immunoreactive, and are thus probably involved in medial cortex inhibition. Moreover, a small fraction of them displayed beta-endorphin immunoreactivity. The distribution of these Neuronal types is not uniform in the laminae of the outer plexiform layer. Type 1 (sarmentous) and type 3 (stellate) Neurons overlap the axonal field projection coming from the dorsal cortex and the thalamus, whereas types 4 (deep stellate) and 5 (couchant) Neurons overlap ipsi- and contralateral dorsomedial projection fields as well as raphe serotoninergic and opioid immunoreactive axonal plexi. Thus, these Neuronal types may be involved in the control of specific inputs to the medial cortex by presumably feed-forward inhibition; nevertheless, feed-back inhibition may also occur regarding type 4 (deep stellate) Neurons that extend deep dendrites to the zinc-rich bouton field.
Horst Bleckmann - One of the best experts on this subject based on the ideXlab platform.
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Morphology of a thermosensitive Multipolar Neuron in the infrared organ of Merimna atrata (Coleoptera, Buprestidae).
Arthropod structure & development, 2001Co-Authors: Helmut Schmitz, Anke Schmitz, Horst BleckmannAbstract:Two pairs of infrared (IR) organs are situated ventrolaterally on the second and third abdominal sternites of the Australian fire beetle Merimna atrata (Buprestidae). In ventral view, each IR organ has a round IR absorbing area under which a sensory complex is attached to the epidermis. The main component of the complex is a single large Multipolar Neuron and its mass of highly branched dendrites. All parts of this Neuron are enveloped in glial cells. The proximal primary dendrites, which arise from the soma, finally branch into several hundred tightly packed terminal dendrites, which contain many mitochondria. We term this unusual morphology of the dendritic region a terminal dendritic mass (TDM). Additionally, two chordotonal organs were found in each sensory complex. Their somata are integrated in the complex and the dendrites extend to the periphery of the absorbing area. The bauplan of the dendritic region is reminiscent of the thermosensitive trigeminal nerve fibers innervating the absorbing structures in the IR receptors in boid and crotalid snakes. Because this Multipolar Neuron also functions as a thermoreceptor, another example of a functional analogy between insect and vertebrate sensory systems could be demonstrated.
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A new type of infrared organ in the Australian "fire-beetle" Merimna atrata (Coleoptera: Buprestidae).
Die Naturwissenschaften, 2000Co-Authors: Helmut Schmitz, Anke Schmitz, Horst BleckmannAbstract:The Australian buprestid beetle Merimna atrata (Coleoptera: Buprestidae) approaches forest fires because its larvae develop in freshly burnt wood. So far nothing is known about possible sensory systems enabling the beetles to detect fires and to cope with the thermal environment close to the flames. We found that M. atrata has two pairs of infrared (IR) organs on the ventrolateral sides of the abdomen. Each IR organ consists of a specialized IR-absorbing area which is innervated by one thermosensitive Multipolar Neuron. The primary dendritic branches ramify into more than 800 closely packed terminal endings which contain a large number of mitochondria. We called the special morphology of the dendritic region a terminal dendritic mass. The type of IR receptor found in M. atrata is unique in insects and can best be compared with the IR organs of boid snakes.
F.j. Martínez-guijarro - One of the best experts on this subject based on the ideXlab platform.
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Neurons of the medial cortex outer plexiform layer of the lizard Podarcis hispanica: Golgi and immunocytochemical studies
The Journal of comparative neurology, 1994Co-Authors: J A L De La Iglesia, F.j. Martínez-guijarro, Carlos Lopez-garciaAbstract:The study of Golgi-impregnated lizard brains has revealed a scarce but heterogeneous Neuronal population in the outer plexiform layer of the medial cortex. Some of the Neuronal types detected here resemble the Neurons of the dentate molecular layer of the mammalian hippocampus. According to their morphology, five intrinsic Neuronal types have been clearly identified: short axon aspinous bipolar Neuron (type 1, or sarmentous Neuron), short axon aspinous juxtasomatic Neuron (type 2, or coral Neuron), short axon sparsely spinous Multipolar Neuron (type 3, or stellate Neuron), short axon sparsely spinous juxtasomatic Multipolar Neuron (type 4, or deep stellate Neuron), and sparsely spinous juxtasomatic horizontal Neuron (type 5, or couchant Neuron). Most Neuronal types were identified as gamma-aminobutyric acid (GABA) and parvalbumin immunoreactive, and are thus probably involved in medial cortex inhibition. Moreover, a small fraction of them displayed beta-endorphin immunoreactivity. The distribution of these Neuronal types is not uniform in the laminae of the outer plexiform layer. Type 1 (sarmentous) and type 3 (stellate) Neurons overlap the axonal field projection coming from the dorsal cortex and the thalamus, whereas types 4 (deep stellate) and 5 (couchant) Neurons overlap ipsi- and contralateral dorsomedial projection fields as well as raphe serotoninergic and opioid immunoreactive axonal plexi. Thus, these Neuronal types may be involved in the control of specific inputs to the medial cortex by presumably feed-forward inhibition; nevertheless, feed-back inhibition may also occur regarding type 4 (deep stellate) Neurons that extend deep dendrites to the zinc-rich bouton field.
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An axosomatic and axodendritic Multipolar Neuron in the lizard cerebral cortex.
Journal of anatomy, 1994Co-Authors: A Bernabeu, F.j. Martínez-guijarro, J A De La Iglesia, C Lopez-garciaAbstract:The morphology and synaptic organisation of a type of Multipolar Neuron of the lizard cerebral cortex were studied by Golgi impregnation, intracellular injection of horseradish peroxidase, electron microscopy, and immunocytochemistry. It is a GABA-immunoreactive interNeuron and most likely parvalbumin-immunoreactive. Its conspicuous axonal arbor is characterised by an initial segment arising from the soma or from a juxtasomatic dendritic segment. The initial axon segment ramifies and gives rise to thick myelinated segments that terminate in short unmyelinated branches studded with thick boutons 'en passant' that (1) make axosomatic synapses on bipyramidal Neuronal somata and (2) synapse on initial apical dendritic segments of bipyramidal Neurons forming climbing-like cartridges. The dendrites extend throughout the thickness of the cortex, receiving synaptic input from a variety of sources of which the most prominent is that of zinc-positive boutons coming from granule cells of the medial cortex. According to its synaptology, this interNeuron may play a role in regulating the activity of bipyramidal Neurons by both feed-forward and feed-back inhibition mechanisms. From a comparative standpoint, it may be related to the sparsely spiny or nonspiny Multipolar Neurons of the stratum oriens of the mammalian hippocampus.
