Describe the particular charcteristics of Jhana's condition, the ways they might be physicalized in performance, and the function of Jhana as a catalyst in revealing the handicaps of the other characters in Toronto, Mississippi by Joan Macleod.
Jhana's only disability is a cognitive one: she suffers from autism:
developmental disability significantly affecting verbal and non-verbal communication and social interaction, (University of Iowa).
Aside from age-related behaviors, there is no consistent physicality that accompanies autism.
Some symptoms do present is physical manifestations. These would be incorporated accordingly into the performance as the script calls for them. If the script does not call in the stage directions for presentation of physical manifestation, then part of the challenge of playing Jhana is to act the autism without "tag" actions or physicality that "mark" her visually as disabled by autism.