Good afternoon! Janel here from SfN. Guest registration is open to non-scientist family members or guests of a scientist. The guest registration fee includes a badge, admission to social events, and access to a scientific event for the sole purpose of observing the registered scientist’s presentation. A co-author on your poster would be considered a member of the scientific community, and would therefore not be eligible for guest registration. One-day registration for scientists is not available.
For more information on registration categories, visit http://www.sfn.org/annual-meeting/neuroscience-2017/registration/categories-and-fees.