Fritjof Helmchen - Publications

Affiliations: 
Brain Research Institute Universität Zürich, Zürich, ZH, Switzerland 
Area:
neural circuits

122 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2019 Sych Y, Chernysheva M, Sumanovski LT, Helmchen F. High-density multi-fiber photometry for studying large-scale brain circuit dynamics. Nature Methods. PMID 31086339 DOI: 10.1038/s41592-019-0400-4  0.76
2019 van der Bourg A, Yang JW, Stüttgen MC, Reyes-Puerta V, Helmchen F, Luhmann HJ. Temporal Refinement of Sensory-Evoked Activity across Layers in Developing Mouse Barrel Cortex. The European Journal of Neuroscience. PMID 30941846 DOI: 10.1111/ejn.14413  0.52
2019 Rocha MD, Düring DN, Bethge P, Voigt FF, Hildebrand S, Helmchen F, Pfeifer A, Hahnloser RHR, Gahr M. Tissue Clearing and Light Sheet Microscopy: Imaging the Unsectioned Adult Zebra Finch Brain at Cellular Resolution. Frontiers in Neuroanatomy. 13: 13. PMID 30837847 DOI: 10.3389/fnana.2019.00013  0.88
2019 Perin P, Voigt FF, Bethge P, Helmchen F, Pizzala R. iDISCO+ for the Study of Neuroimmune Architecture of the Rat Auditory Brainstem. Frontiers in Neuroanatomy. 13: 15. PMID 30814937 DOI: 10.3389/fnana.2019.00015  0.88
2019 Zarb Y, Weber-Stadlbauer U, Kirschenbaum D, Kindler DR, Richetto J, Keller D, Rademakers R, Dickson DW, Pasch A, Byzova T, Nahar K, Voigt FF, Helmchen F, Boss A, Aguzzi A, et al. Ossified blood vessels in primary familial brain calcification elicit a neurotoxic astrocyte response. Brain : a Journal of Neurology. PMID 30805583 DOI: 10.1093/brain/awz032  0.88
2019 Grandjean J, Corcoba A, Kahn MC, Upton AL, Deneris ES, Seifritz E, Helmchen F, Mann EO, Rudin M, Saab BJ. A brain-wide functional map of the serotonergic responses to acute stress and fluoxetine. Nature Communications. 10: 350. PMID 30664643 DOI: 10.1038/s41467-018-08256-w  0.44
2018 Keller A, Nuvolone M, Abakumova I, Chincisan A, Reimann R, Avar M, Heinzer D, Hornemann S, Wagner J, Kirschenbaum D, Voigt FF, Zhu C, Regli L, Helmchen F, Aguzzi A. Prion pathogenesis is unaltered in a mouse strain with a permeable blood-brain barrier. Plos Pathogens. 14: e1007424. PMID 30496289 DOI: 10.1371/journal.ppat.1007424  0.88
2018 Gilad A, Gallero-Salas Y, Groos D, Helmchen F. Behavioral Strategy Determines Frontal or Posterior Location of Short-Term Memory in Neocortex. Neuron. 99: 814-828.e7. PMID 30100254 DOI: 10.1016/j.neuron.2018.07.029  0.6
2018 Mohan H, Gallero-Salas Y, Carta S, Sacramento J, Laurenczy B, Sumanovski LT, de Kock CPJ, Helmchen F, Sachidhanandam S. Sensory representation of an auditory cued tactile stimulus in the posterior parietal cortex of the mouse. Scientific Reports. 8: 7739. PMID 29773806 DOI: 10.1038/s41598-018-25891-x  0.84
2018 Schlegel F, Sych Y, Schroeter A, Stobart J, Weber B, Helmchen F, Rudin M. Fiber-optic implant for simultaneous fluorescence-based calcium recordings and BOLD fMRI in mice. Nature Protocols. 13: 840-855. PMID 29599439 DOI: 10.1038/nprot.2018.003  0.64
2018 Pilz GA, Bottes S, Betizeau M, Jörg DJ, Carta S, Simons BD, Helmchen F, Jessberger S. Live imaging of neurogenesis in the adult mouse hippocampus. Science (New York, N.Y.). 359: 658-662. PMID 29439238 DOI: 10.1126/science.aao5056  0.72
2018 Moeys DP, Corradi F, Li C, Bamford SA, Longinotti L, Voigt FF, Berry S, Taverni G, Helmchen F, Delbruck T. A Sensitive Dynamic and Active Pixel Vision Sensor for Color or Neural Imaging Applications. Ieee Transactions On Biomedical Circuits and Systems. 12: 123-136. PMID 29377801 DOI: 10.1109/TBCAS.2017.2759783  0.88
2017 Muir DR, Molina-Luna P, Roth MM, Helmchen F, Kampa BM. Specific excitatory connectivity for feature integration in mouse primary visual cortex. Plos Computational Biology. 13: e1005888. PMID 29240769 DOI: 10.1371/journal.pcbi.1005888  1
2017 Helmchen F, Gilad A, Chen JL. Neocortical Dynamics during Whisker-based Sensory Discrimination in Head-Restrained Mice. Neuroscience. PMID 28919043 DOI: 10.1016/j.neuroscience.2017.09.003  0.88
2017 Voigt FF, Emaury F, Bethge P, Waldburger D, Link SM, Carta S, van der Bourg A, Helmchen F, Keller U. Multiphoton in vivo imaging with a femtosecond semiconductor disk laser. Biomedical Optics Express. 8: 3213-3231. PMID 28717563 DOI: 10.1364/BOE.8.003213  0.88
2017 Bethge P, Carta S, Lorenzo DA, Egolf L, Goniotaki D, Madisen L, Voigt FF, Chen JL, Schneider B, Ohkura M, Nakai J, Zeng H, Aguzzi A, Helmchen F. An R-CaMP1.07 reporter mouse for cell-type-specific expression of a sensitive red fluorescent calcium indicator. Plos One. 12: e0179460. PMID 28640817 DOI: 10.1371/journal.pone.0179460  0.88
2017 Keller AJ, Houlton R, Kampa BM, Lesica NA, Mrsic-Flogel TD, Keller GB, Helmchen F. Stimulus relevance modulates contrast adaptation in visual cortex. Elife. 6. PMID 28130922 DOI: 10.7554/eLife.21589  1
2016 Brandalise F, Carta S, Helmchen F, Lisman J, Gerber U. Dendritic NMDA spikes are necessary for timing-dependent associative LTP in CA3 pyramidal cells. Nature Communications. 7: 13480. PMID 27848967 DOI: 10.1038/ncomms13480  0.76
2016 van der Bourg A, Yang JW, Reyes-Puerta V, Laurenczy B, Wieckhorst M, Stüttgen MC, Luhmann HJ, Helmchen F. Layer-Specific Refinement of Sensory Coding in Developing Mouse Barrel Cortex. Cerebral Cortex (New York, N.Y. : 1991). PMID 27620976 DOI: 10.1093/cercor/bhw280  0.52
2016 Pilz GA, Carta S, Stäuble A, Ayaz A, Jessberger S, Helmchen F. Functional Imaging of Dentate Granule Cells in the Adult Mouse Hippocampus. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 36: 7407-14. PMID 27413151 DOI: 10.1523/JNEUROSCI.3065-15.2016  0.72
2016 Chen JL, Voigt FF, Javadzadeh M, Krueppel R, Helmchen F. Long-Range population dynamics of anatomically defined neocortical networks. Elife. 5. PMID 27218452 DOI: 10.7554/eLife.14679  1
2016 Leitner FC, Melzer S, Lütcke H, Pinna R, Seeburg PH, Helmchen F, Monyer H. Spatially segregated feedforward and feedback neurons support differential odor processing in the lateral entorhinal cortex. Nature Neuroscience. PMID 27182817 DOI: 10.1038/nn.4303  1
2015 Chen IW, Helmchen F, Lütcke H. Specific Early and Late Oddball-Evoked Responses in Excitatory and Inhibitory Neurons of Mouse Auditory Cortex. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 35: 12560-73. PMID 26354921 DOI: 10.1523/JNEUROSCI.2240-15.2015  1
2015 Muir DR, Roth MM, Helmchen F, Kampa BM. Model-based analysis of pattern motion processing in mouse primary visual cortex. Frontiers in Neural Circuits. 9: 38. PMID 26300738 DOI: 10.3389/fncir.2015.00038  1
2015 Chen JL, Margolis DJ, Stankov A, Sumanovski LT, Schneider BL, Helmchen F. Pathway-specific reorganization of projection neurons in somatosensory cortex during learning. Nature Neuroscience. PMID 26098757 DOI: 10.1038/nn.4046  1
2015 Mayrhofer JM, Haiss F, Helmchen F, Weber B. Sparse, reliable, and long-term stable representation of periodic whisker deflections in the mouse barrel cortex. Neuroimage. 115: 52-63. PMID 25934471 DOI: 10.1016/j.neuroimage.2015.04.045  0.64
2015 Madisen L, Garner AR, Shimaoka D, Chuong AS, Klapoetke NC, Li L, van der Bourg A, Niino Y, Egolf L, Monetti C, Gu H, Mills M, Cheng A, Tasic B, Nguyen TN, ... ... Helmchen F, et al. Transgenic mice for intersectional targeting of neural sensors and effectors with high specificity and performance. Neuron. 85: 942-58. PMID 25741722 DOI: 10.1016/j.neuron.2015.02.022  1
2015 Helmchen F, Tank DW. A single-compartment model of calcium dynamics in nerve terminals and dendrites. Cold Spring Harbor Protocols. 2015: 155-67. PMID 25646507 DOI: 10.1101/pdb.top085910  1
2015 Muir DR, Roth MM, Helmchen F, Kampa BM. Model-based analysis of pattern motion processing in mouse primary visual cortex Frontiers in Neural Circuits. 9. DOI: 10.3389/fncir.2015.00038  1
2015 Voigt FF, Chen JL, Krüppel R, Helmchen F. A modular two-photon microscope for simultaneous imaging of distant cortical areas in vivo Progress in Biomedical Optics and Imaging - Proceedings of Spie. 9329. DOI: 10.1117/12.2076388  1
2015 Mayrhofer JM, Haiss F, Helmchen F, Weber B. Sparse, reliable, and long-term stable representation of periodic whisker deflections in the mouse barrel cortex Neuroimage. 115: 52-63. DOI: 10.1016/j.neuroimage.2015.04.045  1
2015 Helmchen F, Voigt FF, Chen JL. In vivo calcium imaging of information processing in mouse neocortex during behavior Optics and the Brain, Brain 2015 1
2015 Helmchen F, Voigt FF, Chen JL. In vivo calcium imaging of information processing in mouse neocortex during behavior Optics and the Brain, Brain 2015 1
2014 Musall S, von der Behrens W, Mayrhofer JM, Weber B, Helmchen F, Haiss F. Tactile frequency discrimination is enhanced by circumventing neocortical adaptation. Nature Neuroscience. 17: 1567-73. PMID 25242306 DOI: 10.1038/nn.3821  1
2014 Wahl AS, Omlor W, Rubio JC, Chen JL, Zheng H, Schröter A, Gullo M, Weinmann O, Kobayashi K, Helmchen F, Ommer B, Schwab ME. Neuronal repair. Asynchronous therapy restores motor control by rewiring of the rat corticospinal tract after stroke. Science (New York, N.Y.). 344: 1250-5. PMID 24926013 DOI: 10.1126/science.1253050  1
2014 Grewe BF, Helmchen F. High-speed two-photon calcium imaging of neuronal population activity using acousto-optic deflectors. Cold Spring Harbor Protocols. 2014: 618-29. PMID 24890212 DOI: 10.1101/pdb.prot081778  1
2014 Margolis DJ, Lütcke H, Helmchen F. Microcircuit dynamics of map plasticity in barrel cortex. Current Opinion in Neurobiology. 24: 76-81. PMID 24492082 DOI: 10.1016/j.conb.2013.08.019  1
2014 Grewe BF, Helmchen F, Kampa BM. Two-photon imaging of neuronal network dynamics in neocortex Neuromethods. 85: 133-150. DOI: 10.1007/978-1-62703-785-3_9  1
2014 Margolis DJ, Lütcke H, Helmchen F, Weber B, Haiss F. Chronic two-photon imaging of neural activity in the anesthetized and awake behaving rodent Neuromethods. 85: 151-173. DOI: 10.1007/978-1-62703-785-3_10  1
2014 Helmchen F, Weber B. Neocortex in the spotlight: Concepts, questions, and methods Neuromethods. 85: 3-18. DOI: 10.1007/978-1-62703-785-3_1  1
2014 Weber B, Helmchen F. Preface Neuromethods. 85: vii-viii. DOI: 10.1007/978-1-62703-785-3  1
2013 Lütcke H, Gerhard F, Zenke F, Gerstner W, Helmchen F. Inference of neuronal network spike dynamics and topology from calcium imaging data. Frontiers in Neural Circuits. 7: 201. PMID 24399936 DOI: 10.3389/fncir.2013.00201  1
2013 Graber MH, Helmchen F, Hahnloser RH. Activity in a premotor cortical nucleus of zebra finches is locally organized and exhibits auditory selectivity in neurons but not in glia. Plos One. 8: e81177. PMID 24312533 DOI: 10.1371/journal.pone.0081177  1
2013 Devor A, Bandettini PA, Boas DA, Bower JM, Buxton RB, Cohen LB, Dale AM, Einevoll GT, Fox PT, Franceschini MA, Friston KJ, Fujimoto JG, Geyer MA, Greenberg JH, Halgren E, ... ... Helmchen F, et al. The challenge of connecting the dots in the B.R.A.I.N. Neuron. 80: 270-4. PMID 24139032 DOI: 10.1016/j.neuron.2013.09.008  1
2013 Fahrbach FO, Voigt FF, Schmid B, Helmchen F, Huisken J. Rapid 3D light-sheet microscopy with a tunable lens. Optics Express. 21: 21010-26. PMID 24103973 DOI: 10.1364/OE.21.021010  1
2013 Helmchen F, Denk W, Kerr JN. Miniaturization of two-photon microscopy for imaging in freely moving animals. Cold Spring Harbor Protocols. 2013: 904-13. PMID 24086055 DOI: 10.1101/pdb.top078147  1
2013 Chen JL, Pfäffli OA, Voigt FF, Margolis DJ, Helmchen F. Online correction of licking-induced brain motion during two-photon imaging with a tunable lens. The Journal of Physiology. 591: 4689-98. PMID 23940380 DOI: 10.1113/jphysiol.2013.259804  1
2013 Chen JL, Carta S, Soldado-Magraner J, Schneider BL, Helmchen F. Behaviour-dependent recruitment of long-range projection neurons in somatosensory cortex. Nature. 499: 336-40. PMID 23792559 DOI: 10.1038/nature12236  1
2013 Lütcke H, Margolis DJ, Helmchen F. Steady or changing? Long-term monitoring of neuronal population activity. Trends in Neurosciences. 36: 375-84. PMID 23608298 DOI: 10.1016/j.tins.2013.03.008  1
2013 Langer D, van 't Hoff M, Keller AJ, Nagaraja C, Pfäffli OA, Göldi M, Kasper H, Helmchen F. HelioScan: a software framework for controlling in vivo microscopy setups with high hardware flexibility, functional diversity and extendibility. Journal of Neuroscience Methods. 215: 38-52. PMID 23416135 DOI: 10.1016/j.jneumeth.2013.02.006  1
2013 Feldmeyer D, Brecht M, Helmchen F, Petersen CC, Poulet JF, Staiger JF, Luhmann HJ, Schwarz C. Barrel cortex function. Progress in Neurobiology. 103: 3-27. PMID 23195880 DOI: 10.1016/j.pneurobio.2012.11.002  1
2013 Johannssen HC, Helmchen F. Two-photon imaging of spinal cord cellular networks. Experimental Neurology. 242: 18-26. PMID 22849822 DOI: 10.1016/j.expneurol.2012.07.014  1
2013 Helmchen F, Hub̈ener M. Neuronal networks in the spotlight: Deciphering cellular activity patterns with fluorescent proteins | Neuronale netzwerke im rampenlicht: Mit leuchtenden proteinen zelluläre aktivitätsmuster entschlüsseln Neuroforum. 19: 47-55.  1
2012 Margolis DJ, Lütcke H, Schulz K, Haiss F, Weber B, Kügler S, Hasan MT, Helmchen F. Reorganization of cortical population activity imaged throughout long-term sensory deprivation. Nature Neuroscience. 15: 1539-46. PMID 23086335 DOI: 10.1038/nn.3240  1
2012 Roth MM, Helmchen F, Kampa BM. Distinct functional properties of primary and posteromedial visual area of mouse neocortex. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 32: 9716-26. PMID 22787057 DOI: 10.1523/JNEUROSCI.0110-12.2012  1
2012 Coiret G, Ster J, Grewe B, Wendling F, Helmchen F, Gerber U, Benquet P. Neuron to astrocyte communication via cannabinoid receptors is necessary for sustained epileptiform activity in rat hippocampus. Plos One. 7: e37320. PMID 22615976 DOI: 10.1371/journal.pone.0037320  1
2012 Schulz K, Sydekum E, Krueppel R, Engelbrecht CJ, Schlegel F, Schröter A, Rudin M, Helmchen F. Simultaneous BOLD fMRI and fiber-optic calcium recording in rat neocortex. Nature Methods. 9: 597-602. PMID 22561989 DOI: 10.1038/nmeth.2013  1
2012 Farinelli M, Heitz FD, Grewe BF, Tyagarajan SK, Helmchen F, Mansuy IM. Selective regulation of NR2B by protein phosphatase-1 for the control of the NMDA receptor in neuroprotection. Plos One. 7: e34047. PMID 22479519 DOI: 10.1371/journal.pone.0034047  1
2012 Nimmerjahn A, Helmchen F. In vivo labeling of cortical astrocytes with sulforhodamine 101 (SR101). Cold Spring Harbor Protocols. 2012: 326-34. PMID 22383644 DOI: 10.1101/pdb.prot068155  1
2012 Langer D, Helmchen F. Post hoc immunostaining of GABAergic neuronal subtypes following in vivo two-photon calcium imaging in mouse neocortex. PflüGers Archiv : European Journal of Physiology. 463: 339-54. PMID 22134770 DOI: 10.1007/s00424-011-1048-9  1
2012 Minderer M, Liu W, Sumanovski LT, Kügler S, Helmchen F, Margolis DJ. Chronic imaging of cortical sensory map dynamics using a genetically encoded calcium indicator. The Journal of Physiology. 590: 99-107. PMID 22083602 DOI: 10.1113/jphysiol.2011.219014  1
2012 Helmchen F. Biochemical compartmentalization in dendrites Dendrites. DOI: 10.1093/acprof:oso/9780198566564.003.0010  1
2011 Kampa BM, Roth MM, Göbel W, Helmchen F. Representation of visual scenes by local neuronal populations in layer 2/3 of mouse visual cortex. Frontiers in Neural Circuits. 5: 18. PMID 22180739 DOI: 10.3389/fncir.2011.00018  1
2011 Kampa BM, Göbel W, Helmchen F. Measuring neuronal population activity using 3D laser scanning. Cold Spring Harbor Protocols. 2011: 1340-9. PMID 22046041 DOI: 10.1101/pdb.prot066597  1
2011 Helmchen F. Calibration of fluorescent calcium indicators. Cold Spring Harbor Protocols. 2011: 923-30. PMID 21807862 DOI: 10.1101/pdb.top120  1
2011 Helmchen F. Calibration protocols for fluorescent calcium indicators. Cold Spring Harbor Protocols. 2011: 980-4. PMID 21807855 DOI: 10.1101/pdb.prot5649  1
2011 Grewe BF, Voigt FF, van 't Hoff M, Helmchen F. Fast two-layer two-photon imaging of neuronal cell populations using an electrically tunable lens. Biomedical Optics Express. 2: 2035-46. PMID 21750778 DOI: 10.1364/BOE.2.002035  1
2011 Ster J, Mateos JM, Grewe BF, Coiret G, Corti C, Corsi M, Helmchen F, Gerber U. Enhancement of CA3 hippocampal network activity by activation of group II metabotropic glutamate receptors. Proceedings of the National Academy of Sciences of the United States of America. 108: 9993-7. PMID 21628565 DOI: 10.1073/pnas.1100548108  1
2011 Lütcke H, Helmchen F. Two-photon imaging and analysis of neural network dynamics Reports On Progress in Physics. 74. DOI: 10.1088/0034-4885/74/8/086602  1
2010 Ruchty M, Helmchen F, Wehner R, Kleineidam CJ. Representation of thermal information in the antennal lobe of leaf-cutting ants. Frontiers in Behavioral Neuroscience. 4: 174. PMID 21120133 DOI: 10.3389/fnbeh.2010.00174  1
2010 Johannssen HC, Helmchen F. In vivo Ca2+ imaging of dorsal horn neuronal populations in mouse spinal cord. The Journal of Physiology. 588: 3397-402. PMID 20660563 DOI: 10.1113/jphysiol.2010.191833  1
2010 Lütcke H, Murayama M, Hahn T, Margolis DJ, Astori S, Zum Alten Borgloh SM, Göbel W, Yang Y, Tang W, Kügler S, Sprengel R, Nagai T, Miyawaki A, Larkum ME, Helmchen F, et al. Optical recording of neuronal activity with a genetically-encoded calcium indicator in anesthetized and freely moving mice. Frontiers in Neural Circuits. 4: 9. PMID 20461230 DOI: 10.3389/fncir.2010.00009  1
2010 Engelbrecht CJ, Voigt F, Helmchen F. Miniaturized selective plane illumination microscopy for high-contrast in vivo fluorescence imaging. Optics Letters. 35: 1413-5. PMID 20436587 DOI: 10.1364/OL.35.001413  1
2010 Grewe BF, Langer D, Kasper H, Kampa BM, Helmchen F. High-speed in vivo calcium imaging reveals neuronal network activity with near-millisecond precision. Nature Methods. 7: 399-405. PMID 20400966 DOI: 10.1038/nmeth.1453  1
2010 Lee CM, Engelbrecht CJ, Soper TD, Helmchen F, Seibel EJ. Scanning fiber endoscopy with highly flexible, 1 mm catheterscopes for wide-field, full-color imaging. Journal of Biophotonics. 3: 385-407. PMID 20336702 DOI: 10.1002/jbio.200900087  1
2010 Göbel W, Kampa BM, Helmchen F. In vivo imaging of cellular network signaling Handbook of Cell Signaling, 2/E. 3: 2753-2757. DOI: 10.1016/B978-0-12-374145-5.00321-1  1
2009 Grewe BF, Helmchen F. Optical probing of neuronal ensemble activity. Current Opinion in Neurobiology. 19: 520-9. PMID 19854041 DOI: 10.1016/j.conb.2009.09.003  1
2009 Engelbrecht CJ, Göbel W, Helmchen F. Enhanced fluorescence signal in nonlinear microscopy through supplementary fiber-optic light collection. Optics Express. 17: 6421-35. PMID 19365467 DOI: 10.1364/OE.17.006421  1
2009 Hoogland TM, Kuhn B, Göbel W, Huang W, Nakai J, Helmchen F, Flint J, Wang SS. Radially expanding transglial calcium waves in the intact cerebellum. Proceedings of the National Academy of Sciences of the United States of America. 106: 3496-501. PMID 19211787 DOI: 10.1073/pnas.0809269106  1
2008 Helmchen F, Kleinfeld D. Chapter 10. In vivo measurements of blood flow and glial cell function with two-photon laser-scanning microscopy. Methods in Enzymology. 444: 231-54. PMID 19007667 DOI: 10.1016/S0076-6879(08)02810-3  1
2008 Helmchen F, Petersen CC. New views into the brain of mice on the move. Nature Methods. 5: 925-6. PMID 18974733 DOI: 10.1038/nmeth1108-925  1
2008 Engelbrecht CJ, Johnston RS, Seibel EJ, Helmchen F. Ultra-compact fiber-optic two-photon microscope for functional fluorescence imaging in vivo. Optics Express. 16: 5556-64. PMID 18542658 DOI: 10.1364/OE.16.005556  0.68
2008 Göbel W, Helmchen F. Optical 3D measurement of neuronal network dynamics | Optische Messung neuronaler Netzwerkdynamik in 3D Neuroforum. 14: 184-189.  1
2007 Göbel W, Helmchen F. In vivo calcium imaging of neural network function. Physiology (Bethesda, Md.). 22: 358-65. PMID 18073408 DOI: 10.1152/physiol.00032.2007  1
2007 Kerr JN, de Kock CP, Greenberg DS, Bruno RM, Sakmann B, Helmchen F. Spatial organization of neuronal population responses in layer 2/3 of rat barrel cortex. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 27: 13316-28. PMID 18045926 DOI: 10.1523/JNEUROSCI.2210-07.2007  1
2007 Göbel W, Helmchen F. New angles on neuronal dendrites in vivo. Journal of Neurophysiology. 98: 3770-9. PMID 17898141 DOI: 10.1152/jn.00850.2007  1
2007 Larkum ME, Waters J, Sakmann B, Helmchen F. Dendritic spikes in apical dendrites of neocortical layer 2/3 pyramidal neurons. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 27: 8999-9008. PMID 17715337 DOI: 10.1523/JNEUROSCI.1717-07.2007  1
2007 Helmchen F, Nevian T. Little strokes fill big oaks: a simple in vivo stain of brain cells. Neuron. 53: 771-3. PMID 17359911 DOI: 10.1016/j.neuron.2007.03.001  1
2007 Nevian T, Helmchen F. Calcium indicator loading of neurons using single-cell electroporation. PflüGers Archiv : European Journal of Physiology. 454: 675-88. PMID 17334778 DOI: 10.1007/s00424-007-0234-2  1
2007 Göbel W, Kampa BM, Helmchen F. Imaging cellular network dynamics in three dimensions using fast 3D laser scanning. Nature Methods. 4: 73-9. PMID 17143280 DOI: 10.1038/nmeth989  1
2006 Waters J, Helmchen F. Background synaptic activity is sparse in neocortex. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 26: 8267-77. PMID 16899721 DOI: 10.1523/JNEUROSCI.2152-06.2006  1
2005 Helmchen F, Denk W. Deep tissue two-photon microscopy. Nature Methods. 2: 932-40. PMID 16299478 DOI: 10.1038/nmeth818  1
2005 Kerr JN, Greenberg D, Helmchen F. Imaging input and output of neocortical networks in vivo. Proceedings of the National Academy of Sciences of the United States of America. 102: 14063-8. PMID 16157876 DOI: 10.1073/pnas.0506029102  1
2005 Sullivan MR, Nimmerjahn A, Sarkisov DV, Helmchen F, Wang SS. In vivo calcium imaging of circuit activity in cerebellar cortex. Journal of Neurophysiology. 94: 1636-44. PMID 16079125 DOI: 10.1152/jn.01013.2004  1
2005 Awater H, Burr D, Lappe M, Morrone MC, Goldberg ME. Effect of saccadic adaptation on localization of visual targets. Journal of Neurophysiology. 93: 3605-14. PMID 15843478 DOI: 10.1152/jn.01013.2004  1
2005 Nimmerjahn A, Kirchhoff F, Helmchen F. Resting microglial cells are highly dynamic surveillants of brain parenchyma in vivo. Science (New York, N.Y.). 308: 1314-8. PMID 15831717 DOI: 10.1126/science.1110647  1
2005 Broser PJ, Schulte R, Roth A, Helmchen F, Waters J, Lang S, Sakmann B, Wittum G. Nonlinear anisotropic diffusion filtering of three-dimensional image data from 2-photon microscopy Proceedings of Spie - the International Society For Optical Engineering. 5672: 44-69. DOI: 10.1117/12.593376  1
2004 Nimmerjahn A, Kirchhoff F, Kerr JN, Helmchen F. Sulforhodamine 101 as a specific marker of astroglia in the neocortex in vivo. Nature Methods. 1: 31-7. PMID 15782150 DOI: 10.1038/nmeth706  1
2004 Dittgen T, Nimmerjahn A, Komai S, Licznerski P, Waters J, Margrie TW, Helmchen F, Denk W, Brecht M, Osten P. Lentivirus-based genetic manipulations of cortical neurons and their optical and electrophysiological monitoring in vivo. Proceedings of the National Academy of Sciences of the United States of America. 101: 18206-11. PMID 15608064 DOI: 10.1073/pnas.0407976101  1
2004 Waters J, Helmchen F. Boosting of action potential backpropagation by neocortical network activity in vivo. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 24: 11127-36. PMID 15590929 DOI: 10.1523/JNEUROSCI.2933-04.2004  1
2004 Göbel W, Kerr JN, Nimmerjahn A, Helmchen F. Miniaturized two-photon microscope based on a flexible coherent fiber bundle and a gradient-index lens objective. Optics Letters. 29: 2521-3. PMID 15584281 DOI: 10.1364/OL.29.002521  1
2004 Broser PJ, Schulte R, Lang S, Roth A, Helmchen F, Waters J, Sakmann B, Wittum G. Nonlinear anisotropic diffusion filtering of three-dimensional image data from two-photon microscopy. Journal of Biomedical Optics. 9: 1253-64. PMID 15574067 DOI: 10.1117/1.1806832  1
2004 Brecht M, Fee MS, Garaschuk O, Helmchen F, Margrie TW, Svoboda K, Osten P. Novel approaches to monitor and manipulate single neurons in vivo. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 24: 9223-7. PMID 15496655 DOI: 10.1523/JNEUROSCI.3344-04.2004  1
2004 Göbel W, Nimmerjahn A, Helmchen F. Distortion-free delivery of nanojoule femtosecond pulses from a Ti:sapphire laser through a hollow-core photonic crystal fiber. Optics Letters. 29: 1285-7. PMID 15209273 DOI: 10.1364/OL.29.001285  1
2004 Kim J, Dittgen T, Nimmerjahn A, Waters J, Pawlak V, Helmchen F, Schlesinger S, Seeburg PH, Osten P. Sindbis vector SINrep(nsP2S726): a tool for rapid heterologous expression with attenuated cytotoxicity in neurons. Journal of Neuroscience Methods. 133: 81-90. PMID 14757348 DOI: 10.1016/j.jneumeth.2003.09.029  1
2003 Waters J, Larkum M, Sakmann B, Helmchen F. Supralinear Ca2+ influx into dendritic tufts of layer 2/3 neocortical pyramidal neurons in vitro and in vivo. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 23: 8558-67. PMID 13679425  1
2002 Helmchen F. Miniaturization of fluorescence microscopes using fibre optics. Experimental Physiology. 87: 737-45. PMID 12447453 DOI: 10.1113/eph8702478  1
2002 Helmchen F, Denk W. New developments in multiphoton microscopy. Current Opinion in Neurobiology. 12: 593-601. PMID 12367641 DOI: 10.1016/S0959-4388(02)00362-8  1
2002 Helmchen F. Raising the speed limit--fast Ca(2+) handling in dendritic spines. Trends in Neurosciences. 25: 438-41; discussion 4. PMID 12183197 DOI: 10.1016/S0166-2236(02)02232-4  1
2002 Helmchen F, Waters J. Ca2+ imaging in the mammalian brain in vivo. European Journal of Pharmacology. 447: 119-29. PMID 12151004 DOI: 10.1016/S0014-2999(02)01836-8  1
2002 Helmchen F, Tank DW, Denk W. Enhanced two-photon excitation through optical fiber by single-mode propagation in a large core. Applied Optics. 41: 2930-4. PMID 12027181  1
2001 Helmchen F, Fee MS, Tank DW, Denk W. A miniature head-mounted two-photon microscope. high-resolution brain imaging in freely moving animals. Neuron. 31: 903-12. PMID 11580892 DOI: 10.1016/S0896-6273(01)00421-4  1
1999 Helmchen F, Svoboda K, Denk W, Tank DW. In vivo dendritic calcium dynamics in deep-layer cortical pyramidal neurons. Nature Neuroscience. 2: 989-96. PMID 10526338 DOI: 10.1038/14788  1
1999 Svoboda K, Helmchen F, Denk W, Tank DW. Spread of dendritic excitation in layer 2/3 pyramidal neurons in rat barrel cortex in vivo. Nature Neuroscience. 2: 65-73. PMID 10195182 DOI: 10.1038/4569  1
1998 Kleinfeld D, Mitra PP, Helmchen F, Denk W. Fluctuations and stimulus-induced changes in blood flow observed in individual capillaries in layers 2 through 4 of rat neocortex. Proceedings of the National Academy of Sciences of the United States of America. 95: 15741-6. PMID 9861040 DOI: 10.1073/pnas.95.26.15741  1
1998 Bollmann JH, Helmchen F, Borst JG, Sakmann B. Postsynaptic Ca2+ influx mediated by three different pathways during synaptic transmission at a calyx-type synapse. The Journal of Neuroscience : the Official Journal of the Society For Neuroscience. 18: 10409-19. PMID 9852578  1
1998 Borst JG, Helmchen F. Calcium influx during an action potential. Methods in Enzymology. 293: 352-71. PMID 9711618 DOI: 10.1016/S0076-6879(98)93023-3  1
1998 Markram H, Roth A, Helmchen F. Competitive calcium binding: implications for dendritic calcium signaling. Journal of Computational Neuroscience. 5: 331-48. PMID 9663555 DOI: 10.1023/A:1008891229546  1
1997 Helmchen F, Borst JG, Sakmann B. Calcium dynamics associated with a single action potential in a CNS presynaptic terminal. Biophysical Journal. 72: 1458-71. PMID 9138591 DOI: 10.1016/S0006-3495(97)78792-7  1
1996 Helmchen F, Imoto K, Sakmann B. Ca2+ buffering and action potential-evoked Ca2+ signaling in dendrites of pyramidal neurons. Biophysical Journal. 70: 1069-81. PMID 8789126 DOI: 10.1016/S0006-3495(96)79653-4  1
1995 Borst JG, Helmchen F, Sakmann B. Pre- and postsynaptic whole-cell recordings in the medial nucleus of the trapezoid body of the rat. The Journal of Physiology. 489: 825-40. PMID 8788946 DOI: 10.1113/jphysiol.1995.sp021095  1
1995 Schiller J, Helmchen F, Sakmann B. Spatial profile of dendritic calcium transients evoked by action potentials in rat neocortical pyramidal neurones. The Journal of Physiology. 487: 583-600. PMID 8544123  1
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