has part has part characteristic of inheres in has modifier Abnormality of facial musculature Facial myokymia HP:0004651 Involuntary facial quivering Facial myokymia may be caused by a plaque of multiple sclerosis or have other causes. Facial myokymia is a fine fibrillary activity of one or more muscles innervated by the facial nerve (the seventh cranial nerve). UMLS:C0270871 Involuntary facial contraction SNOMEDCT_US:1070000 HP:0000317 Myokymia abnormal face