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    1. Neuroscience

    Simultaneous two-photon imaging and two-photon optogenetics of cortical circuits in three dimensions

    Weijian Yang et al.
    An all-optical 3D two-photon imaging and photostimulation platform was demonstrated, with the capability to precisely stimulate a large group of cells in mice cortex in vivo with low laser power.
    1. Neuroscience

    Transient inhibition and long-term facilitation of locomotion by phasic optogenetic activation of serotonin neurons

    Patrícia A Correia et al.
    Phasic activation of dorsal raphe serotonin neurons transiently inhibits locomotion without influencing anxiety or producing reinforcement, but when repeated over many days a long-term facilitation of locomotion is produced.
    1. Neuroscience

    Optogenetic dissection of descending behavioral control in Drosophila

    Jessica Cande et al.
    Optogenetically activated individual descending neurons in Drosophila melanogaster drive varied stereotyped motor patterns that are often influenced by the animal's initial behavioral state.
    1. Immunology and Inflammation

    Optogenetic control shows that kinetic proofreading regulates the activity of the T cell receptor

    O Sascha Yousefi et al.
    Controlling the duration of ligand binding to the T cell receptor by light shows that T cells discriminate stimulatory from non-stimulatory ligands by measuring the dynamics of ligand binding.
    1. Neuroscience

    Optogenetic dissection of basolateral amygdala contributions to intertemporal choice in young and aged rats

    Caesar M Hernandez et al.
    Optogenetic approaches in young and aged rats define multiple roles for basolateral amygdala in guiding intertemporal choice, and show that these roles change across the lifespan.
    1. Neuroscience

    Analogue closed-loop optogenetic modulation of hippocampal pyramidal cells dissociates gamma frequency and amplitude

    Elizabeth Nicholson et al.
    Neurons can synchronize, supporting flexible communication among brain areas; closed-loop optogenetics allows the frequency and power of population oscillations to be dissociated, providing a tool to interrogate how networks couple.
    1. Neuroscience

    PARIS, an optogenetic method for functionally mapping gap junctions

    Ling Wu et al.
    As the first fully genetically encoded method, PARIS allows cell-specific, long-term, repeated measurements of gap junctional coupling with high spatiotemporal resolution, facilitating its study in both health and disease.
    1. Neuroscience

    Serotonin: Slow motion

    Naoshige Uchida, Jeremiah Y Cohen
    Optogenetic stimulation of serotonin neurons in the dorsal raphe causes mice to move more slowly without causing any apparent motor deficits or anxiety-like effects.
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    1. Cell Biology

    Cell cycle entry triggers a switch between two modes of Cdc42 activation during yeast polarization

    Kristen Witte et al.
    Optogenetic control of Cdc42 activation during polarization of budding yeast demonstrates a cell cycle regulated switch between two distinct modes of positive feedback.
    1. Neuroscience

    Optical electrophysiology for probing function and pharmacology of voltage-gated ion channels

    Hongkang Zhang et al.
    Optogenetic tools enable sophisticated measurements of a voltage-gated sodium channel implicated in pain, as well as high-throughput screening of candidate channel blockers.