Facial masking, or hypomimia, results in the immobilization of the facial muscles, leading to a blank expression. Because the face exhibits emotional cues, listeners try to connect what a person is saying with the expression on his or her face. A person with Parkinson's may be talking about an emotional topic, but their face will not reflect their emotion. Current research is focusing on occupational therapy and ways to help Parkinson's patients with hypomimia express themselves more effectively so that others understand them.

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