The On-Off direction-selective ganglion cell (DSGC) in mammalian retinas responds most strongly to a stimulus moving in a specific direction. The DSGC initiates spikes in its dendritic tree. which are thought to propagate to the soma with high probability. Both dendritic and somatic spikes in the DSGC display strong directional tuning. https://www.findingthestory.com/product-category/slitting-shear/