The UCLA miniscope is an open source alternative to the Inscopix system for calcium imaging in freely behaving animals. One of the benefits of their system that they tout is the ability to have a commutator on the data cable. A commutator allows for a cable to rotate without twisting, a major problem when trying to record from freely moving animals. Other methods that I have heard of to allow rotation include a MMCX connector on the cable.
I haven't seen any specific recipes for solving this problem; the miniscope website has no instructions on including a commutator in the cable, only vague references to the possiblity.
Any solutions out there?