(NBC Chicago) - Rev. Jesse Jackson, a civil rights icon who gained worldwide acclaim for his work, is currently hospitalized in Chicago, a source tells NBC Chicago.

A person familiar with the situation, who spoke to NBC Chicago on the condition of anonymity, told the station that Jackson is hospitalized in Chicago.

Jackson is in the hospital under observation for Progressive Supranuclear Palsy, according to a statement from the organization he founded that fights for social change from its Chicago headquarters, the Rainbow PUSH Coalition.

"He has been managing this neurodegenerative condition for more than a decade," Rainbow PUSH said in the statement. "He was originally diagnosed with Parkinson's disease; however, last April, his PSP condition was confirmed."

Rainbow PUSH added that J

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