This was a place said to have no spoken language, but communication only by signssuch as nods, raised eyebrows, grimaces, and smiles.
en.wikipedia.org Other involuntary movements may also occur, such as tremors, chorea, blepharospasms, and grimacing.
en.wikipedia.org This is not to be confused with a similar but usually involuntary expression of anxiety known as a grimace.
en.wikipedia.org A less dominant individual will also make a fear grimace accompanied by a scream to appease or redirect aggression.
en.wikipedia.org Specific symptoms included tics, grimacing, movement disorders, difficulty swallowing, poor coordination, hyporeflexia, chorea, and seizures.
en.wikipedia.org