Assertion: visual system's cell | /r/CapableOf | collect signal
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Source sentences:
text: And then we can add the fact that we have horizontal cells that collect signals going sideways on the retinal surface, thereby creating-- hypothetically speaking, at least-- the surround effect, although that we will look at in just a minute in more detail because some people had proposed-- many hypotheses had emerged why we have ON and OFF channels-- and a lot of the hypotheses was to create this famous center-surround antagonism that you see in the retinal ganglion cells.