We present a strategy to register manually traced neuronal morphologies to a reference atlas, with the final goal to publish the aligned neurons in the EBRAINS knowledge-graph, visualize them in the interactive atlas viewer and compare them to other published neurons.
Our use case consists of a thalamo-cortical long-range projection neuron that is manually traced from 33 sagittal tissue sections of a mouse brain. We apply a three-step procedure:1. Manually select for each tissue section a corresponding slice from a reference atlas.2. Deform each tissue section such that its outline and anatomical features match that of the corresponding reference slice.3. For each section, apply the same deformation to the portion of the neuron that it intersects.
A trained neuroanatomist confirmed the correct thalamic and cortical positioning of the neuron. In terms of the alignment of the neuron with respect to cortical layers, we found up to 50% discrepancies. A procedure was developed to shift the cortical depth of the neuron and reduce the error to below 10%.
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