Birdie,
As I understand, Meharry has an invitation only post-bac type program. You must apply to the medical college and if they feel you have potential, but jut not quite ready for med school, then you will be invited for this one year (I am pretty sure about the timeframe) program. They also have a summer session for incoming M1 students. They suggested that the summer program was just to help give a light review & help folks get comfortable & situated prior to the start of real classes.
I am not sure if this is what you are referring to, or there may be other programs of which I am not aware.
Take care & hope this is helpful.