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Thank you for your work on melanopsin and photoreceptive cells. This stuff fascinates me. Since you're knowledgable, I wonder if you can explain, preferably in the right article, whether the retinohypothalamic tract is indeed a part of the optic nerve, or runs beside it, and/or where it separates from the optic nerve? Hordaland (talk) 04:19, 26 April 2009 (UTC)[reply]
