Weiler, Simon;
Guggiana Nilo, Drago;
Bonhoeffer, Tobias;
Hübener, Mark;
Rose, Tobias;
Scheuss, Volker;
(2022)
Orientation and direction tuning align with dendritic morphology and spatial connectivity in mouse visual cortex.
Current Biology
, 32
(8)
1743-1753.e7.
10.1016/j.cub.2022.02.048.
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Abstract
The functional properties of neocortical pyramidal cells (PCs), such as direction and orientation selectivity in visual cortex, predominantly derive from their excitatory and inhibitory inputs. For layer 2/3 (L2/3) PCs, the detailed relationship between their functional properties and how they sample and integrate information across cortical space is not fully understood. Here, we study this relationship by combining functional in vivo two-photon calcium imaging, in vitro functional circuit mapping, and dendritic reconstruction of the same L2/3 PCs in mouse visual cortex. Our work reveals direct correlations between dendritic morphology and functional input connectivity and the orientation as well as direction tuning of L2/3 PCs. First, the apical dendritic tree is elongated along the postsynaptic preferred orientation, considering the representation of visual space in the cortex as determined by its retinotopic organization. Additionally, sharply orientation-tuned cells show a less complex apical tree compared with broadly tuned cells. Second, in direction-selective L2/3 PCs, the spatial distribution of presynaptic partners is offset from the soma opposite to the preferred direction. Importantly, although the presynaptic excitatory and inhibitory input distributions spatially overlap on average, the excitatory input distribution is spatially skewed along the preferred direction, in contrast to the inhibitory distribution. Finally, the degree of asymmetry is positively correlated with the direction selectivity of the postsynaptic L2/3 PC. These results show that the dendritic architecture and the spatial arrangement of excitatory and inhibitory presynaptic cells of L2/3 PCs play important roles in shaping their orientation and direction tuning.
| Type: | Article |
|---|---|
| Title: | Orientation and direction tuning align with dendritic morphology and spatial connectivity in mouse visual cortex |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cub.2022.02.048 |
| Publisher version: | https://doi.org/10.1016/j.cub.2022.02.048 |
| Language: | English |
| Additional information: | © 2022 The Authors. Published by Elsevier Inc. under a Creative Commons license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | calcium imaging, dendritic morphology, direction tuning, genetically encoded calcium indicator, in vitro, in vivo, in vivo two-photon imaging, L2/3 pyramidal cells, laser-scanning photostimulation, orientation tuning, patch clamp, sensory cortex, synaptic connectivity, visual cortex |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > The Sainsbury Wellcome Centre |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10164922 |
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