_:vb50953532 "url:http://ghr.nlm.nih.gov/condition/essential-tremor"^^ . _:vb50953532 . _:vb50953532 "A movement disorder that causes involuntary tremors, especially in the hands. It occurs alone without other neurological signs and symptoms."^^ . _:vb50953532 . _:vb50953532 . _:vb50953532 . _:vb50953532 . _:vb50953532 . _:vb50953532 "url:http://en.wikipedia.org/wiki/Essential_tremor"^^ .