11/15. hemifacial spasm associated with otitis media with effusion: a first reported case.hemifacial spasm is a condition consisting of unilateral paroxysmal involuntary contractions of the muscles innervated by the facial nerve. The most common etiology is a vascular loop compression at the root exit zone of the nerve. We present here a first reported case of hemifacial spasm associated with otitis media with effusion, in a 6-year-old girl, which was relieved immediately following ventilation tubes insertion. A proposed mechanism is described.- - - - - - - - - - ranking = 1keywords = muscle (Clic here for more details about this article) |
12/15. hemifacial spasm resulting from facial nerve compression near the internal acoustic meatus--case report.A 61-year-old female presented with a rare case of hemifacial spasm (HFS) resulting from facial nerve compression near the internal acoustic meatus. She underwent a first surgery for microvascular decompression at the root entry zone of the facial nerve, but this did not achieve resolution of the HFS. During the second surgery, the meatal loop of the anterior inferior cerebellar artery (AICA) was found to be the offending artery near the internal acoustic meatus. When the AICA was dissected and separated from the facial nerve, abnormal muscle responses of the mentalis muscle due to electrical stimulation of the zygomatic branch of the facial nerve were abolished. Following surgery the patient was completely free of the HFS.- - - - - - - - - - ranking = 2keywords = muscle (Clic here for more details about this article) |
13/15. Benign congenital hemifacial spasm.hemifacial spasm (HFS) is characterized by involuntary, irregular contraction of the muscles innervated by one facial nerve. Usually, it is caused by facial nerve injury either due to microvascular compression or a posterior fossa tumor, but it also occurs without apparent cause. It is rare in children; no congenital cases have yet been reported. We report the first case of congenital HFS in a term newborn delivered by forceps after a normal labor. Multimodal evoked potentials, electroencephalogram, computed tomography of the petrous bone, as well as brain magnetic resonance imaging and angiography disclosed no abnormalities. Serial neurodevelopmental examinations and video recordings performed until 8 months of age documented a normal neurodevelopmental status and a tendency for spontaneous diminution of the HFS. An intrauterine facial nerve injury as the causative factor of HFS, being responsible for its benign course, is proposed.- - - - - - - - - - ranking = 1keywords = muscle (Clic here for more details about this article) |
14/15. hemifacial spasm triggered by vasodilators.hemifacial spasm features myoclonic-like, paroxysmal, unilateral muscle twitching, attributable to vascular compression at the facial pontine root entry zone. We present the case of an 85-year-old man who presented with idiopathic hemifacial spasm with onset 23 years before. For the last 5 years, he was successfully treated with botulinum toxin injections. However, occasional nitrate intake for precordial pain promptly triggered muscle twitching. vasodilation may exacerbate not only cases of hemifacial spasm, but even of trigeminal neuralgia, both recognized as neurovascular compressive syndromes.- - - - - - - - - - ranking = 2keywords = muscle (Clic here for more details about this article) |
15/15. Atypical hemifacial spasm.Among 155 cases of hemifacial spasm (HFS), the authors found two cases of atypical HFS (1.3%) in which spasm started with the orbicularis oris and buccinator muscles, and gradually spread upward to involve the orbicularis occuli muscle, whereas the reverse process is usually seen in cases of typical HFS. The compression site in cases of atypical HFS is the posterior/rostral aspect of the facial nerve (FN), whereas it was the anterior/caudal aspect of the FN in all cases of typical HFS except for one. The meatal loop of the anterior inferior cerebellar artery (AICA) compressed the FN when the vessel passed between the FN and the eighth cranial nerve (8th N). These findings suggest that the topographical organization in the FN in the cerebellopontine cistern may be reversed to a peripheral distribution: the fibres on the posterior/rostral side of the FN innervate the lower part of the facial muscles, and those in the anterior/caudal side of the nerve innervate the upper part of the facial muscles. When examining patients with HFS, we must very carefully determine whether patients have typical or atypical HFS, to determine whether blood vessels (usually the meatal loop of the AICA) between the FN and the 8th N as well as at the root exit zone of the FN are to be decompressed.- - - - - - - - - - ranking = 4keywords = muscle (Clic here for more details about this article) |
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