Rev. Jesse Jackson has been hospitalized in Chicago, said the Rainbow PUSH Coalition, the nonprofit the civil rights leader founded, Wednesday evening.

The big picture: The 84-year-old is "under observation for Progressive Supranuclear Palsy (PSP)," per the coalition's statement. "He has been managing this neurodegenerative condition for more than a decade."

Zoom in: Jackson was originally diagnosed with Parkinson's disease, but his PSP condition was confirmed last April, the statement notes. • "The family appreciates all prayers at this time."

Of note: Jackson has played a leading role in the U.S. civil rights movement since the 1960s. • He joined Dr. Martin Luther King Jr. for the Freedom Movement, a summer-long protest of housing inequality on the South and West sides of Chicago.

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