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Behavioral Strategy Determines Frontal or Posterior Location of Short-Term Memory in Neocortex.

Gilad A, Gallero-Salas Y, Groos D, Helmchen F.

Neuron. 2018 Aug 22;99(4):814-828.e7. doi: 10.1016/j.neuron.2018.07.029. Epub 2018 Aug 9.


Sensory representation of an auditory cued tactile stimulus in the posterior parietal cortex of the mouse.

Mohan H, Gallero-Salas Y, Carta S, Sacramento J, Laurenczy B, Sumanovski LT, de Kock CPJ, Helmchen F, Sachidhanandam S.

Sci Rep. 2018 May 17;8(1):7739. doi: 10.1038/s41598-018-25891-x.


Fiber-optic implant for simultaneous fluorescence-based calcium recordings and BOLD fMRI in mice.

Schlegel F, Sych Y, Schroeter A, Stobart J, Weber B, Helmchen F, Rudin M.

Nat Protoc. 2018 May;13(5):840-855. doi: 10.1038/nprot.2018.003. Epub 2018 Mar 29.


Live imaging of neurogenesis in the adult mouse hippocampus.

Pilz GA, Bottes S, Betizeau M, Jörg DJ, Carta S, Simons BD, Helmchen F, Jessberger S.

Science. 2018 Feb 9;359(6376):658-662. doi: 10.1126/science.aao5056.


A Sensitive Dynamic and Active Pixel Vision Sensor for Color or Neural Imaging Applications.

Moeys DP, Corradi F, Li C, Bamford SA, Longinotti L, Voigt FF, Berry S, Taverni G, Helmchen F, Delbruck T.

IEEE Trans Biomed Circuits Syst. 2018 Feb;12(1):123-136. doi: 10.1109/TBCAS.2017.2759783.


Specific excitatory connectivity for feature integration in mouse primary visual cortex.

Muir DR, Molina-Luna P, Roth MM, Helmchen F, Kampa BM.

PLoS Comput Biol. 2017 Dec 14;13(12):e1005888. doi: 10.1371/journal.pcbi.1005888. eCollection 2017 Dec.


Optogenetically stimulating intact rat corticospinal tract post-stroke restores motor control through regionalized functional circuit formation.

Wahl AS, Büchler U, Brändli A, Brattoli B, Musall S, Kasper H, Ineichen BV, Helmchen F, Ommer B, Schwab ME.

Nat Commun. 2017 Oct 30;8(1):1187. doi: 10.1038/s41467-017-01090-6.


Neocortical dynamics during whisker-based sensory discrimination in head-restrained mice.

Helmchen F, Gilad A, Chen JL.

Neuroscience. 2018 Jan 1;368:57-69. doi: 10.1016/j.neuroscience.2017.09.003. Epub 2017 Sep 14. Review.


Multiphoton in vivo imaging with a femtosecond semiconductor disk laser.

Voigt FF, Emaury F, Bethge P, Waldburger D, Link SM, Carta S, van der Bourg A, Helmchen F, Keller U.

Biomed Opt Express. 2017 Jun 13;8(7):3213-3231. doi: 10.1364/BOE.8.003213. eCollection 2017 Jul 1.


An R-CaMP1.07 reporter mouse for cell-type-specific expression of a sensitive red fluorescent calcium indicator.

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.

PLoS One. 2017 Jun 22;12(6):e0179460. doi: 10.1371/journal.pone.0179460. eCollection 2017.


Stimulus relevance modulates contrast adaptation in visual cortex.

Keller AJ, Houlton R, Kampa BM, Lesica NA, Mrsic-Flogel TD, Keller GB, Helmchen F.

Elife. 2017 Jan 28;6. pii: e21589. doi: 10.7554/eLife.21589.


Dendritic NMDA spikes are necessary for timing-dependent associative LTP in CA3 pyramidal cells.

Brandalise F, Carta S, Helmchen F, Lisman J, Gerber U.

Nat Commun. 2016 Nov 16;7:13480. doi: 10.1038/ncomms13480.


Layer-Specific Refinement of Sensory Coding in Developing Mouse Barrel Cortex.

van der Bourg A, Yang JW, Reyes-Puerta V, Laurenczy B, Wieckhorst M, Stüttgen MC, Luhmann HJ, Helmchen F.

Cereb Cortex. 2017 Oct 1;27(10):4835-4850. doi: 10.1093/cercor/bhw280.


Functional Imaging of Dentate Granule Cells in the Adult Mouse Hippocampus.

Pilz GA, Carta S, Stäuble A, Ayaz A, Jessberger S, Helmchen F.

J Neurosci. 2016 Jul 13;36(28):7407-14. doi: 10.1523/JNEUROSCI.3065-15.2016.


Long-range population dynamics of anatomically defined neocortical networks.

Chen JL, Voigt FF, Javadzadeh M, Krueppel R, Helmchen F.

Elife. 2016 May 24;5. pii: e14679. doi: 10.7554/eLife.14679.


Spatially segregated feedforward and feedback neurons support differential odor processing in the lateral entorhinal cortex.

Leitner FC, Melzer S, Lütcke H, Pinna R, Seeburg PH, Helmchen F, Monyer H.

Nat Neurosci. 2016 Jul;19(7):935-44. doi: 10.1038/nn.4303. Epub 2016 May 16.


Two-Photon Functional Imaging of Neuronal Activity.

Helmchen F.

In: Frostig RD, editor. In Vivo Optical Imaging of Brain Function. 2nd edition. Boca Raton (FL): CRC Press/Taylor & Francis; 2009. Chapter 2.


Specific Early and Late Oddball-Evoked Responses in Excitatory and Inhibitory Neurons of Mouse Auditory Cortex.

Chen IW, Helmchen F, Lütcke H.

J Neurosci. 2015 Sep 9;35(36):12560-73. doi: 10.1523/JNEUROSCI.2240-15.2015.


Model-based analysis of pattern motion processing in mouse primary visual cortex.

Muir DR, Roth MM, Helmchen F, Kampa BM.

Front Neural Circuits. 2015 Aug 5;9:38. doi: 10.3389/fncir.2015.00038. eCollection 2015.


Pathway-specific reorganization of projection neurons in somatosensory cortex during learning.

Chen JL, Margolis DJ, Stankov A, Sumanovski LT, Schneider BL, Helmchen F.

Nat Neurosci. 2015 Aug;18(8):1101-8. doi: 10.1038/nn.4046. Epub 2015 Jun 22.


Sparse, reliable, and long-term stable representation of periodic whisker deflections in the mouse barrel cortex.

Mayrhofer JM, Haiss F, Helmchen F, Weber B.

Neuroimage. 2015 Jul 15;115:52-63. doi: 10.1016/j.neuroimage.2015.04.045. Epub 2015 Apr 28.


Transgenic mice for intersectional targeting of neural sensors and effectors with high specificity and performance.

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, Sunkin SM, Benucci A, Nagy A, Miyawaki A, Helmchen F, Empson RM, Knöpfel T, Boyden ES, Reid RC, Carandini M, Zeng H.

Neuron. 2015 Mar 4;85(5):942-58. doi: 10.1016/j.neuron.2015.02.022.


A single-compartment model of calcium dynamics in nerve terminals and dendrites.

Helmchen F, Tank DW.

Cold Spring Harb Protoc. 2015 Feb 2;2015(2):155-67. doi: 10.1101/pdb.top085910.


Tactile frequency discrimination is enhanced by circumventing neocortical adaptation.

Musall S, von der Behrens W, Mayrhofer JM, Weber B, Helmchen F, Haiss F.

Nat Neurosci. 2014 Nov;17(11):1567-73. doi: 10.1038/nn.3821. Epub 2014 Sep 21.


Neuronal repair. Asynchronous therapy restores motor control by rewiring of the rat corticospinal tract after stroke.

Wahl AS, Omlor W, Rubio JC, Chen JL, Zheng H, Schröter A, Gullo M, Weinmann O, Kobayashi K, Helmchen F, Ommer B, Schwab ME.

Science. 2014 Jun 13;344(6189):1250-5. doi: 10.1126/science.1253050.


High-speed two-photon calcium imaging of neuronal population activity using acousto-optic deflectors.

Grewe BF, Helmchen F.

Cold Spring Harb Protoc. 2014 Jun 2;2014(6):618-29. doi: 10.1101/pdb.prot081778.


Microcircuit dynamics of map plasticity in barrel cortex.

Margolis DJ, Lütcke H, Helmchen F.

Curr Opin Neurobiol. 2014 Feb;24(1):76-81. doi: 10.1016/j.conb.2013.08.019. Epub 2013 Sep 22. Review.


Inference of neuronal network spike dynamics and topology from calcium imaging data.

Lütcke H, Gerhard F, Zenke F, Gerstner W, Helmchen F.

Front Neural Circuits. 2013 Dec 24;7:201. doi: 10.3389/fncir.2013.00201. eCollection 2013.


Activity in a premotor cortical nucleus of zebra finches is locally organized and exhibits auditory selectivity in neurons but not in glia.

Graber MH, Helmchen F, Hahnloser RH.

PLoS One. 2013 Dec 3;8(12):e81177. doi: 10.1371/journal.pone.0081177. eCollection 2013.


The challenge of connecting the dots in the B.R.A.I.N.

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, Hämäläinen MS, Helmchen F, Hyman BT, Jasanoff A, Jernigan TL, Judd LL, Kim SG, Kleinfeld D, Kopell NJ, Kutas M, Kwong KK, Larkum ME, Lo EH, Magistretti PJ, Mandeville JB, Masliah E, Mitra PP, Mobley WC, Moskowitz MA, Nimmerjahn A, Reynolds JH, Rosen BR, Salzberg BM, Schaffer CB, Silva GA, So PT, Spitzer NC, Tootell RB, Van Essen DC, Vanduffel W, Vinogradov SA, Wald LL, Wang LV, Weber B, Yodh AG.

Neuron. 2013 Oct 16;80(2):270-4. doi: 10.1016/j.neuron.2013.09.008.


Rapid 3D light-sheet microscopy with a tunable lens.

Fahrbach FO, Voigt FF, Schmid B, Helmchen F, Huisken J.

Opt Express. 2013 Sep 9;21(18):21010-26. doi: 10.1364/OE.21.021010.


Miniaturization of two-photon microscopy for imaging in freely moving animals.

Helmchen F, Denk W, Kerr JN.

Cold Spring Harb Protoc. 2013 Oct 1;2013(10):904-13. doi: 10.1101/pdb.top078147.


Online correction of licking-induced brain motion during two-photon imaging with a tunable lens.

Chen JL, Pfäffli OA, Voigt FF, Margolis DJ, Helmchen F.

J Physiol. 2013 Oct 1;591(19):4689-98. doi: 10.1113/jphysiol.2013.259804. Epub 2013 Aug 12.


Behaviour-dependent recruitment of long-range projection neurons in somatosensory cortex.

Chen JL, Carta S, Soldado-Magraner J, Schneider BL, Helmchen F.

Nature. 2013 Jul 18;499(7458):336-40. doi: 10.1038/nature12236. Epub 2013 Jun 23.


Steady or changing? Long-term monitoring of neuronal population activity.

Lütcke H, Margolis DJ, Helmchen F.

Trends Neurosci. 2013 Jul;36(7):375-84. doi: 10.1016/j.tins.2013.03.008. Epub 2013 Apr 19. Review.


HelioScan: a software framework for controlling in vivo microscopy setups with high hardware flexibility, functional diversity and extendibility.

Langer D, van 't Hoff M, Keller AJ, Nagaraja C, Pfäffli OA, Göldi M, Kasper H, Helmchen F.

J Neurosci Methods. 2013 Apr 30;215(1):38-52. doi: 10.1016/j.jneumeth.2013.02.006. Epub 2013 Feb 14.


Barrel cortex function.

Feldmeyer D, Brecht M, Helmchen F, Petersen CC, Poulet JF, Staiger JF, Luhmann HJ, Schwarz C.

Prog Neurobiol. 2013 Apr;103:3-27. doi: 10.1016/j.pneurobio.2012.11.002. Epub 2012 Nov 27. Review.


Reorganization of cortical population activity imaged throughout long-term sensory deprivation.

Margolis DJ, Lütcke H, Schulz K, Haiss F, Weber B, Kügler S, Hasan MT, Helmchen F.

Nat Neurosci. 2012 Nov;15(11):1539-46. doi: 10.1038/nn.3240. Epub 2012 Oct 21.


Two-photon imaging of spinal cord cellular networks.

Johannssen HC, Helmchen F.

Exp Neurol. 2013 Apr;242:18-26. doi: 10.1016/j.expneurol.2012.07.014. Epub 2012 Jul 28. Review.


Distinct functional properties of primary and posteromedial visual area of mouse neocortex.

Roth MM, Helmchen F, Kampa BM.

J Neurosci. 2012 Jul 11;32(28):9716-26. doi: 10.1523/JNEUROSCI.0110-12.2012.


Neuron to astrocyte communication via cannabinoid receptors is necessary for sustained epileptiform activity in rat hippocampus.

Coiret G, Ster J, Grewe B, Wendling F, Helmchen F, Gerber U, Benquet P.

PLoS One. 2012;7(5):e37320. doi: 10.1371/journal.pone.0037320. Epub 2012 May 15.


Simultaneous BOLD fMRI and fiber-optic calcium recording in rat neocortex.

Schulz K, Sydekum E, Krueppel R, Engelbrecht CJ, Schlegel F, Schröter A, Rudin M, Helmchen F.

Nat Methods. 2012 Jun;9(6):597-602. doi: 10.1038/nmeth.2013. Epub 2012 May 6.


Selective regulation of NR2B by protein phosphatase-1 for the control of the NMDA receptor in neuroprotection.

Farinelli M, Heitz FD, Grewe BF, Tyagarajan SK, Helmchen F, Mansuy IM.

PLoS One. 2012;7(3):e34047. doi: 10.1371/journal.pone.0034047. Epub 2012 Mar 30.


In vivo labeling of cortical astrocytes with sulforhodamine 101 (SR101).

Nimmerjahn A, Helmchen F.

Cold Spring Harb Protoc. 2012 Mar 1;2012(3):326-34. doi: 10.1101/pdb.prot068155.


Representation of visual scenes by local neuronal populations in layer 2/3 of mouse visual cortex.

Kampa BM, Roth MM, Göbel W, Helmchen F.

Front Neural Circuits. 2011 Dec 12;5:18. doi: 10.3389/fncir.2011.00018. eCollection 2011.


Post hoc immunostaining of GABAergic neuronal subtypes following in vivo two-photon calcium imaging in mouse neocortex.

Langer D, Helmchen F.

Pflugers Arch. 2012 Feb;463(2):339-54. doi: 10.1007/s00424-011-1048-9. Epub 2011 Dec 2.


Chronic imaging of cortical sensory map dynamics using a genetically encoded calcium indicator.

Minderer M, Liu W, Sumanovski LT, Kügler S, Helmchen F, Margolis DJ.

J Physiol. 2012 Jan 1;590(1):99-107. doi: 10.1113/jphysiol.2011.219014. Epub 2011 Nov 14.


Measuring neuronal population activity using 3D laser scanning.

Kampa BM, Göbel W, Helmchen F.

Cold Spring Harb Protoc. 2011 Nov 1;2011(11):1340-9. doi: 10.1101/pdb.prot066597.


Calibration of fluorescent calcium indicators.

Helmchen F.

Cold Spring Harb Protoc. 2011 Aug 1;2011(8):923-30. doi: 10.1101/pdb.top120. No abstract available.


Calibration protocols for fluorescent calcium indicators.

Helmchen F.

Cold Spring Harb Protoc. 2011 Aug 1;2011(8):980-4. doi: 10.1101/pdb.prot5649. No abstract available.

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