To describe three @entity1 with recurrent severe @entity7965 @entity10 precipitated by @entity7875 . @entity158 elicited by @entity7875 is a well-recognized clinical phenomenon in @entity1 with @entity9 , @entity1348 and @entity5588 . Clinical history, neurological and oral examinations, brain magnetic resonance imaging (MRI), cranial nerve electrophysiological testing and skull X-rays are reported. In all the @entity1 @entity158 was induced by @entity7875 ; in the third @entity1 @entity158 was also triggered by eructation. None had history of @entity2704 . @entity1742 and forceful opening of the mouth did not reproduce the @entity158 . The first @entity1 had @entity158 , @entity3413 -induced @entity121 and subclinical @entity1897 ; the second @entity1 had a post-viral @entity16 ; and the third had @entity158 and no underlying @entity16 . Cranial nerve testing and MRI of the brain were normal except for a coincidentally found @entity977 on the first @entity1 . @entity10 or @entity10 with @entity7875 may occur in @entity1 with no apparent cause (primary @entity7875 @entity10 ). It is a chronic, benign condition that requires no specific treatment but needs to be distinguished from secondary @entity7875 @entity10 , of greater clinical relevance.

Primary XXXX @entity10 .

@entity1 :: ('9606', 'Species') :: ['patient', 'patients'] @entity121 :: ('MESH:D009135', 'Disease') :: ['myopathy'] @entity3413 :: ('MESH:D019821', 'Chemical') :: ['simvastatin'] @entity7875 :: ('143334', 'Species') :: ['yawning'] @entity16 :: ('MESH:D009422', 'Disease') :: ['neurological illness', 'benign sensory neuropathy'] @entity2704 :: ('MESH:D008881', 'Disease') :: ['migraine'] @entity1897 :: ('MESH:D010523', 'Disease') :: ['axonal peripheral neuropathy'] @entity7965 :: ('MESH:D006457', 'Disease') :: ['paroxysmal'] @entity977 :: ('MESH:D010911', 'Disease') :: ['pituitary adenoma'] @entity158 :: ('MESH:D010146', 'Disease') :: ['Pain', 'retroauricular and facial pain', 'pain', 'retroauricular pain'] @entity5588 :: ('MESH:C538010', 'Disease') :: ['Eagle syndrome'] @entity10 :: ('MESH:D006261', 'Disease') :: ['Headache', 'cranial pain', 'headache'] @entity1742 :: ('MESH:D001072', 'Disease') :: ['Facial gestures'] @entity9 :: ('MESH:D009437', 'Disease') :: ['cranial neuralgia'] @entity1348 :: ('MESH:D013706', 'Disease') :: ['temporomandibular joint dysfunction syndrome']
@entity7875 :: (143334,Species) :: ['yawning']
