Biomaterial Database

Hemifacial spasm and involuntary facial movements. 2002

N-C Tan, and L-L Chan, and E-K Tan

SingHealth Polyclinics-Pasir Ris, Singapore General Hospital, Singapore.

Hemifacial spasm (HFS) is characterized by tonic and clonic contractions of the muscles innervated by the ipsilateral facial nerve. It is important to distinguish this from other causes of facial spasms, such as psychogenic facial spasm, facial tic, facial myokymia, blepharospasm, and tardive dyskinesia. Magnetic resonance imaging and angiography studies frequently demonstrate vascular compression of the root exit zone of the facial nerve. Importantly, an underlying space-occupying lesion needs to be excluded in patients with associated atypical features such as facial numbness and weakness. Botulinum toxin injection to the facial muscles is an effective treatment for HFS, with few disabling side-effects.

UI	MeSH Term	Description	Entries
D008279	Magnetic Resonance Imaging	Non-invasive method of demonstrating internal anatomy based on the principle that atomic nuclei in a strong magnetic field absorb pulses of radiofrequency energy and emit them as radiowaves which can be reconstructed into computerized images. The concept includes proton spin tomographic techniques.	Chemical Shift Imaging,MR Tomography,MRI Scans,MRI, Functional,Magnetic Resonance Image,Magnetic Resonance Imaging, Functional,Magnetization Transfer Contrast Imaging,NMR Imaging,NMR Tomography,Tomography, NMR,Tomography, Proton Spin,fMRI,Functional Magnetic Resonance Imaging,Imaging, Chemical Shift,Proton Spin Tomography,Spin Echo Imaging,Steady-State Free Precession MRI,Tomography, MR,Zeugmatography,Chemical Shift Imagings,Echo Imaging, Spin,Echo Imagings, Spin,Functional MRI,Functional MRIs,Image, Magnetic Resonance,Imaging, Magnetic Resonance,Imaging, NMR,Imaging, Spin Echo,Imagings, Chemical Shift,Imagings, Spin Echo,MRI Scan,MRIs, Functional,Magnetic Resonance Images,Resonance Image, Magnetic,Scan, MRI,Scans, MRI,Shift Imaging, Chemical,Shift Imagings, Chemical,Spin Echo Imagings,Steady State Free Precession MRI
D008297	Male		Males
D001905	Botulinum Toxins	Toxic proteins produced from the species CLOSTRIDIUM BOTULINUM. The toxins are synthesized as a single peptide chain which is processed into a mature protein consisting of a heavy chain and light chain joined via a disulfide bond. The botulinum toxin light chain is a zinc-dependent protease which is released from the heavy chain upon ENDOCYTOSIS into PRESYNAPTIC NERVE ENDINGS. Once inside the cell the botulinum toxin light chain cleaves specific SNARE proteins which are essential for secretion of ACETYLCHOLINE by SYNAPTIC VESICLES. This inhibition of acetylcholine release results in muscular PARALYSIS.	Botulin,Botulinum Neurotoxin,Botulinum Neurotoxins,Clostridium botulinum Toxins,Botulinum Toxin,Neurotoxin, Botulinum,Neurotoxins, Botulinum,Toxin, Botulinum,Toxins, Botulinum,Toxins, Clostridium botulinum
D003937	Diagnosis, Differential	Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures.	Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D005152	Facial Muscles	Muscles of facial expression or mimetic muscles that include the numerous muscles supplied by the facial nerve that are attached to and move the skin of the face. (From Stedman, 25th ed)	Mimetic Muscles,Facial Muscle,Mimetic Muscle,Muscle, Facial,Muscle, Mimetic,Muscles, Facial,Muscles, Mimetic
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D019299	Decompression, Surgical	A surgical operation for the relief of pressure in a body compartment or on a body part. (From Dorland, 28th ed)	Surgical Decompression,Decompressions, Surgical,Surgical Decompressions
D019569	Hemifacial Spasm	Recurrent clonic contraction of facial muscles, restricted to one side. It may occur as a manifestation of compressive lesions involving the seventh cranial nerve (FACIAL NERVE DISEASES), during recovery from BELL PALSY, or in association with other disorders. (From Adams et al., Principles of Neurology, 6th ed, p1378)	Facial Spasm, Unilateral,Hemifacial Myokymia,Spasm, Hemifacial,Facial Spasms, Unilateral,Hemifacial Spasms,Myokymia, Hemifacial,Spasm, Unilateral Facial,Spasms, Hemifacial,Spasms, Unilateral Facial,Unilateral Facial Spasm,Unilateral Facial Spasms
D020820	Dyskinesias	Abnormal involuntary movements which primarily affect the extremities, trunk, or jaw that occur as a manifestation of an underlying disease process. Conditions which feature recurrent or persistent episodes of dyskinesia as a primary manifestation of disease may be referred to as dyskinesia syndromes (see MOVEMENT DISORDERS). Dyskinesias are also a relatively common manifestation of BASAL GANGLIA DISEASES.	Asterixis,Ballismus,Hemiballismus,Involuntary Movements,Lingual-Facial-Buccal Dyskinesia,Orofacial Dyskinesia,Abnormal Movements,Hemiballism,Linguofacial Dyskinesia,Oral Dyskinesia,Oral-Facial Dyskinesia,Tardive Oral Dyskinesia,Abnormal Movement,Dyskinesia,Dyskinesia, Lingual-Facial-Buccal,Dyskinesia, Linguofacial,Dyskinesia, Oral,Dyskinesia, Oral-Facial,Dyskinesia, Orofacial,Dyskinesias, Lingual-Facial-Buccal,Dyskinesias, Linguofacial,Dyskinesias, Oral,Dyskinesias, Oral-Facial,Dyskinesias, Orofacial,Involuntary Movement,Lingual Facial Buccal Dyskinesia,Lingual-Facial-Buccal Dyskinesias,Linguofacial Dyskinesias,Movement, Abnormal,Movement, Involuntary,Movements, Abnormal,Movements, Involuntary,Oral Dyskinesias,Oral Facial Dyskinesia,Oral-Facial Dyskinesias,Orofacial Dyskinesias,Tardive Oral Dyskinesias