Focal dystonia Craniofacial dystonia 2013-02-23T10:10:32Z Distorted craniofacial posture Abnormal craniofacial posture UMLS:C4072883 UMLS:C1851915 Abnormal craniofacial muscle tone Abnormal facial muscle tone HP:0012179 Facial Dystonia UMLS:C4023011 A form of focal dystonia affecting the face and especially the jaw that is induced by the act of speaking. It is an involuntary contraction of the masticatory muscles, resulting in dysarthria or dysphagia.