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  • 1
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    Perceptual deficits and the activity of the color-opponent and broad-band pathways at isoluminance (1990)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1990-01-12
    Description: The deficits in texture, motion, and depth perception incurred in monkeys at isoluminance were compared with the responses of neurons of the color-opponent and broad-band systems in the lateral geniculate nucleus. Texture perception, assumed to be carried by the color-opponent system, and motion and depth perception, ascribed to the broad-band pathway, were all found to be compromised but not abolished at isoluminance. Correspondingly, both the color-opponent and the broad-band systems were affected at isoluminance, but the activity of the neurons in neither system was abolished. These results suggest that impairment of visual capacities at isoluminance cannot be uniquely attributed to either of these systems and that isoluminant stimuli are inappropriate for the psychophysical isolation of these pathways.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Logothetis, N K -- Schiller, P H -- Charles, E R -- Hurlbert, A C -- EY00676/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1990 Jan 12;247(4939):214-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2294602" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Color Perception/*physiology ; Depth Perception/physiology ; Eye Movements ; Geniculate Bodies/physiology ; *Light ; Macaca mulatta ; Motion Perception/physiology ; Neurons/physiology ; Visual Perception/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    The role of the primate extrastriate area V4 in vision (1991)
    American Association for the Advancement of Science (AAAS)
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    Publication Date: 1991-03-08
    Description: Area V4 is a part of the primate visual cortex. Its role in vision has been extensively debated. Inferences about the functions of this area have now been made by examination of a broad range of visual capacities after ablation of V4 in rhesus monkeys. The results obtained suggest that this area is involved in more complex aspects of visual information processing than had previously been suggested. Monkeys had particularly severe deficits in situations where the task was to select target stimuli that had a lower contrast, smaller size, or slower rate of motion than the array of comparison stimuli from which they had to be discriminated. Extensive training on each specific task resulted in improved performance. However, after V4 ablation, the monkeys could not generalize the specific task to new stimulus configurations and to new spatial locations.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schiller, P H -- Lee, K -- EY00676/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1991 Mar 8;251(4998):1251-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2006413" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Color Perception ; Form Perception ; Macaca mulatta ; Motion Perception ; Pattern Recognition, Visual ; Photic Stimulation ; Saccades ; Space Perception ; Time Factors ; Visual Cortex/*physiology ; *Visual Perception
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
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    Nonlinear dendritic processing determines angular tuning of barrel cortex neurons in vivo (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-09-04
    Description: Layer 4 neurons in primary sensory cortices receive direct sensory information from the external world. A general feature of these neurons is their selectivity to specific features of the sensory stimulation. Various theories try to explain the manner in which these neurons are driven by their incoming sensory information. In all of these theories neurons are regarded as simple elements summing small biased inputs to create tuned output through the axosomatic amplification mechanism. However, the possible role of active dendritic integration in further amplifying the sensory responses and sharpening the tuning curves of neurons is disregarded. Our findings show that dendrites of layer 4 spiny stellate neurons in the barrel cortex can generate local and global multi-branch N-methyl-D-aspartate (NMDA) spikes, which are the main regenerative events in these dendrites. In turn, these NMDA receptor (NMDAR) regenerative mechanisms can sum supralinearly the coactivated thalamocortical and corticocortical inputs. Using in vivo whole-cell recordings combined with an intracellular NMDAR blocker and membrane hyperpolarization, we show that dendritic NMDAR-dependent regenerative responses contribute substantially to the angular tuning of layer 4 neurons by preferentially amplifying the preferred angular directions over non-preferred angles. Taken together, these findings indicate that dendritic NMDAR regenerative amplification mechanisms contribute markedly to sensory responses and critically determine the tuning of cortical neurons.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lavzin, Maria -- Rapoport, Sophia -- Polsky, Alon -- Garion, Liora -- Schiller, Jackie -- England -- Nature. 2012 Oct 18;490(7420):397-401. doi: 10.1038/nature11451. Epub 2012 Sep 2.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, Rappaport Faculty of Medicine & Research Institute, Technion-Israel Institute of Technology, Bat-Galim, Haifa 31096, Israel.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22940864" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Animals ; Dendrites/drug effects/*physiology ; Dizocilpine Maleate/pharmacology ; Mice ; Models, Neurological ; N-Methylaspartate/metabolism ; Neurons/drug effects/*physiology ; Patch-Clamp Techniques ; Receptors, N-Methyl-D-Aspartate/metabolism ; Somatosensory Cortex/*cytology ; Vibrissae/physiology ; Visual Cortex/*cytology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 4
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    Activity-dependent action potential invasion and calcium influx into hippocampal CA1 dendrites (1995)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1995-04-14
    Description: The temporal and spatial profile of activity-evoked changes in membrane potential and intracellular calcium concentration in the dendrites of hippocampal CA1 pyramidal neurons was examined with simultaneous somatic and dendritic patch-pipette recording and calcium imaging experiments. Action potentials are initiated close to the soma of these neurons and backpropagate into the dendrites in an activity-dependent manner; those occurring early in a train propagate actively, whereas those occurring later fail to actively invade the distal dendrites. Consistent with this finding, dendritic calcium transients evoked by single action potentials do not significantly attenuate with distance from the soma, whereas those evoked by trains attenuate substantially. Failure of action potential propagation into the distal dendrites often occurs at branch points. Consequently, neighboring regions of the dendritic tree can experience different voltage and calcium signals during repetitive action potential firing. The influence of backpropagating action potentials on synaptic integration and plasticity will therefore depend on both the extent of dendritic branching and the pattern of neuronal activity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spruston, N -- Schiller, Y -- Stuart, G -- Sakmann, B -- New York, N.Y. -- Science. 1995 Apr 14;268(5208):297-300.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institut fur medizinische Forschung, Abteilung Zellphysiologie, Heidelberg, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7716524" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Calcium/*metabolism ; Calcium Channels/metabolism ; Dendrites/metabolism/*physiology ; Ion Channel Gating ; Neuronal Plasticity ; Patch-Clamp Techniques ; Pyramidal Cells/metabolism/*physiology ; Rats ; Rats, Wistar ; Sodium Channels/metabolism ; Synapses/physiology ; Tetrodotoxin/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 5
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    An all D-amino acid opioid peptide with central analgesic activity from a combinatorial library (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-12-23
    Description: A synthetic combinatorial library containing 52,128,400 D-amino acid hexapeptides was used to identify a ligand for the mu opioid receptor. The peptide, Ac-rfwink-NH2, bears no resemblance to any known opioid peptide. Simulations using molecular dynamics, however, showed that three amino acid moieties have the same spatial orientation as the corresponding pharmacophoric groups of the opioid peptide PLO17. Ac-rfwink-NH2 was shown to be a potent agonist at the mu receptor and induced long-lasting analgesia in mice. Analgesia produced by intraperitoneally administered Ac-rfwink-NH2 was blocked by intracerebroventricular administration of naloxone, demonstrating that this peptide may cross the blood-brain barrier.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dooley, C T -- Chung, N N -- Wilkes, B C -- Schiller, P W -- Bidlack, J M -- Pasternak, G W -- Houghten, R A -- DA-000138/DA/NIDA NIH HHS/ -- DA-02615/DA/NIDA NIH HHS/ -- DA-03742/DA/NIDA NIH HHS/ -- etc. -- New York, N.Y. -- Science. 1994 Dec 23;266(5193):2019-22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Torrey Pines Institute for Molecular Studies, San Diego, CA 92121.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7801131" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Analgesics/chemistry/metabolism/*pharmacology ; Animals ; Brain/metabolism ; Dose-Response Relationship, Drug ; Endorphins/pharmacology ; Enkephalin, Ala(2)-MePhe(4)-Gly(5)- ; Enkephalin, D-Penicillamine (2,5)- ; Enkephalins/metabolism ; Guinea Pigs ; Injections, Intraventricular ; Male ; Mice ; Models, Molecular ; Molecular Sequence Data ; Naloxone/administration & dosage/pharmacology ; Opioid Peptides/chemistry/metabolism/*pharmacology ; Pain Measurement ; Protein Conformation ; Rats ; Receptors, Opioid, mu/agonists/metabolism ; Stereoisomerism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 6
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    Synaptic integration in tuft dendrites of layer 5 pyramidal neurons: a new unifying principle (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-08-08
    Description: Tuft dendrites are the main target for feedback inputs innervating neocortical layer 5 pyramidal neurons, but their properties remain obscure. We report the existence of N-methyl-D-aspartate (NMDA) spikes in the fine distal tuft dendrites that otherwise did not support the initiation of calcium spikes. Both direct measurements and computer simulations showed that NMDA spikes are the dominant mechanism by which distal synaptic input leads to firing of the neuron and provide the substrate for complex parallel processing of top-down input arriving at the tuft. These data lead to a new unifying view of integration in pyramidal neurons in which all fine dendrites, basal and tuft, integrate inputs locally through the recruitment of NMDA receptor channels relative to the fixed apical calcium and axosomatic sodium integration points.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Larkum, Matthew E -- Nevian, Thomas -- Sandler, Maya -- Polsky, Alon -- Schiller, Jackie -- New York, N.Y. -- Science. 2009 Aug 7;325(5941):756-60. doi: 10.1126/science.1171958.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Berne, Buhlplatz 5, 3012 Berne, Switzerland. matthew.larkum@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19661433" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Axons/physiology ; Calcium Signaling ; Computer Simulation ; Dendrites/*physiology ; Excitatory Postsynaptic Potentials ; In Vitro Techniques ; Models, Neurological ; N-Methylaspartate/metabolism ; Neocortex/cytology/*physiology ; Patch-Clamp Techniques ; Pyramidal Cells/*physiology ; Rats ; Rats, Wistar ; Receptors, N-Methyl-D-Aspartate/metabolism ; Sodium/metabolism ; Synapses/*physiology ; Synaptic Potentials
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 7
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    Isolation, structure, and synthesis of a human seminal plasma peptide with inhibin-like activity (1984)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1984-03-16
    Description: A basic peptide isolated from pooled human seminal plasma exhibited inhibin-like activity by suppressing pituitary follicle-stimulating hormone secretion in vitro and in vivo. The peptide has been characterized and sequenced, and a 31-amino-acid synthetic replicate showed full biological activity in vitro.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ramasharma, K -- Sairam, M R -- Seidah, N G -- Chretien, M -- Manjunath, P -- Schiller, P W -- Yamashiro, D -- Li, C H -- New York, N.Y. -- Science. 1984 Mar 16;223(4641):1199-202.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6422553" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Amino Acids/analysis ; Animals ; Follicle Stimulating Hormone/secretion ; Gonadotropin-Releasing Hormone/antagonists & inhibitors ; Humans ; Inhibins/*isolation & purification/pharmacology ; Luteinizing Hormone/secretion ; Male ; Mice ; Molecular Weight ; Peptides/chemical synthesis/isolation & purification ; Pituitary Gland/secretion ; *Prostatic Secretory Proteins ; Proteins/chemical synthesis/*isolation & purification/pharmacology ; Rats ; Semen/*analysis ; Seminal Plasma Proteins
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Effects of frontal eye field and superior colliculus ablations on eye movements (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-11-02
    Description: Two parallel neural pathways are primarily responsible for the control of saccadic eye movements--one mediated through the frontal eye fields and the other through the superior colliculus. When both pathways are disrupted, control of saccadic eye movements is lost. Disruption of either pathway alone produces only subtle deficits.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schiller, P H -- True, S D -- Conway, J L -- New York, N.Y. -- Science. 1979 Nov 2;206(4418):590-2.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/115091" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Brain Mapping ; *Eye Movements ; Frontal Lobe/*physiology ; Haplorhini ; Neural Pathways/physiology ; Reflex/physiology ; Saccades ; Superior Colliculi/*physiology ; Vestibule, Labyrinth/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Identification of the protein encoded by the E6 transforming gene of bovine papillomavirus (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-10-25
    Description: Papillomaviruses (PV) contain several conserved genes that may encode nonstructural proteins; however, none of these predicted gene products have been identified. Papillomavirus E6 genes are retained and expressed as RNA in PV-associated human and animal carcinomas and cell lines. This suggests that the E6 gene product may be important in the maintenance of the malignant phenotype. The E6 open reading frame of the bovine papillomavirus (BPV) genome has been identified as one of two BPV genes that can independently transform mouse cells in vitro. A polypeptide encoded by this region of BPV was produced in a bacterial expression vector and used to raise antisera. The antisera specifically immunoprecipitated the predicted 15.5-kilodalton BPV E6 protein from cells transformed by the E6 gene. The E6 protein was identified in both the nuclear and membrane fractions of these transformed cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Androphy, E J -- Schiller, J T -- Lowy, D R -- 5-F32-CA-07237/CA/NCI NIH HHS/ -- New York, N.Y. -- Science. 1985 Oct 25;230(4724):442-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2996134" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Bovine papillomavirus 1/*genetics ; Cell Line ; Cell Transformation, Viral ; *Genes, Viral ; Mice ; Oncogenes ; Papillomaviridae/*genetics ; RNA, Messenger/genetics ; Rabbits ; Rats ; Tumor Virus Infections/genetics ; Viral Proteins/*genetics/isolation & purification
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 10
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    Peroxisomal defects in neonatal-onset and X-linked adrenoleukodystrophies (1985)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1985-01-04
    Description: Accumulation of very long chain fatty acids in X-linked and neonatal forms of adrenoleukodystrophy (ALD) appears to be a consequence of deficient peroxisomal oxidation of very long chain fatty acids. Peroxisomes were readily identified in liver biopsies taken from a patient having the X-linked disorder. However, in liver biopsies from a patient having neonatal-onset ALD, hepatocellular peroxisomes were greatly reduced in size and number, and sedimentable catalase was markedly diminished. The presence of increased concentrations of serum pipecolic acid and the bile acid intermediate, trihydroxycoprostanic acid, in the neonatal ALD patient are associated with a generalized diminution of peroxisomal activities that was not observed in the patient with X-linked ALD.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Goldfischer, S -- Collins, J -- Rapin, I -- Coltoff-Schiller, B -- Chang, C H -- Nigro, M -- Black, V H -- Javitt, N B -- Moser, H W -- Lazarow, P B -- AG-01468/AG/NIA NIH HHS/ -- AM-17702/AM/NIADDK NIH HHS/ -- N5-03356/PHS HHS/ -- etc. -- New York, N.Y. -- Science. 1985 Jan 4;227(4682):67-70.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3964959" target="_blank"〉PubMed〈/a〉
    Keywords: Adrenoleukodystrophy/genetics/metabolism/*pathology ; Adult ; Animals ; Bile Acids and Salts/metabolism ; Catalase/metabolism ; Child ; Child, Preschool ; Diffuse Cerebral Sclerosis of Schilder/*pathology ; Female ; Humans ; Liver/pathology ; Male ; Microbodies/*pathology ; Oxidation-Reduction ; Pipecolic Acids/blood ; Rats ; *X Chromosome
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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