#Neuropixels recordings show that populations of #gridcells and place cells encode a position signal that within a 125-ms theta cycle sweeps outwards from the animal’s location into the ambient environment, alternating stereotypically between left and right directions. 🧹🧹🧹

The findings overturn the concept of grid (and place) signals as a static representation of space and introduce instead grid (and place) cells as part of a circuit that systematically, dynamically and rigidly patrols the surrounding space. 8/8

The trajectories sweep linearly and unconditionally from the animal’s location into the ambient environment, independently of whether the animal ever visited places on those trajectories. The pattern persists when locations on the sides are inaccessible and in REM sleep. 3/8

Happy day! @SpareBank1SMN donates 50 MNOK ($5 M) to Hjerneforskningsfondet, which increases the Fund´s annual contribution to @KISNeuro by 25%! 50 M thanks to Jan Frode Janson and team. Photo credit: Richard Sagen @adresseavisen; @forskningsradet @KavliFoundation @MayBrittMoser

Now we are in the book. Still Volume 1, with Newton, Boyle, Darwin, Einstein and Turing some pages earlier. Thanks to the @royalsociety for the honour! @KISNeuro @MayBrittMoser

En politisk bestemt «opprydding», som tar form av kutt i alle bevilgninger til toppforskningen gjennom mer enn et år, mangler sidestykke internasjonalt. Dette rammer norsk forskning i en tid vi trenger den mest, og den leverer som best. 2/4

2-photon imaging goes freely-moving! We are releasing @TheMini2P, a 2.4g portable #twophoton 🔬 for fast multiplane calcium imaging of 1000s of neurons in behaving 🐭! Fully open-access. Now it is time to study natural behaviors! By @WikiZong et al @KISNeuro #KiloNeurons #ERCSyG

We developed a 2.4g miniature multiplane 2-photon microscope recording 1000s of neurons in freely moving 🐭 and used it to obtain the 1st topographic maps of all spatial cell types. 🇳🇴🇩🇪🇨🇳 @WikiZong and @HorstObenhaus at @KISNeuro, with @trose_neuro, @t_bonhoeffer #KiloNeurons

Theta frequency is modulated by acceleration but not speed. Implications for computational models – congratulations to Emilio Kropff who has pulled all this together! @KISNeuro researchers @KropffLab @NeuroCellPress

Thanks to @va_normand in the lab for this beautiful #Neuropixels raster – it shows the activity of only a tiny fraction of the more than 1,000 #entorhinal cells he recorded! Come and join us at @KISNeuro!