Myokmia: Difference between revisions
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'''Myokmia''' is an involuntary and continuous [[Myoclonus]] ([[muscle twitch]]) that affects [[facial muscles|the muscles of the face]], particularly the [[eyelid]]s, as a result of the random firing of [[neuron]]s leading into the muscle fibres. It is mainly caused by a lack of sleep, or increased intake of [[nicotine]], [[caffeine]], or by stress. However, Myokmia can also or rare occasions be a [[pathognomonic]] symptom of [[lesion]]s on the [[brain stem]], [[multiple sclerosis]] or pontine glioma.<ref>Sharma RR, Mathad NV, Joshi DN, Mazarelo TB, Vaidya MM. ''Persistent facial myokymia: A rare pathognomic physical sign of intrinsic brain-stem lesions: report of 2 cases and review of literature''</ref> | ==Overview== | ||
'''Myokmia''' is an involuntary and continuous [[Myoclonus]] ([[muscle twitch]]) that affects [[facial muscles|the muscles of the face]], particularly the [[eyelid]]s, as a result of the random firing of [[neuron]]s leading into the muscle fibres. | |||
==Differential diagnosis of causes of myokmia== | |||
It is mainly caused by a lack of sleep, or increased intake of [[nicotine]], [[caffeine]], or by stress. However, Myokmia can also or rare occasions be a [[pathognomonic]] symptom of [[lesion]]s on the [[brain stem]], [[multiple sclerosis]] or pontine glioma.<ref>Sharma RR, Mathad NV, Joshi DN, Mazarelo TB, Vaidya MM. ''Persistent facial myokymia: A rare pathognomic physical sign of intrinsic brain-stem lesions: report of 2 cases and review of literature''</ref> | |||
However, these causes are extremely rare, with only 2 out of 132 cases of Myokmia diagnosed at Seth G.s. Medical College in Bombay being caused by such lesions.<ref>Tharakan J, Bhatia R. ''Continuous hemiacial spasm in cerebello-pontine angle tumours'' Neurol India 1981</ref> | However, these causes are extremely rare, with only 2 out of 132 cases of Myokmia diagnosed at Seth G.s. Medical College in Bombay being caused by such lesions.<ref>Tharakan J, Bhatia R. ''Continuous hemiacial spasm in cerebello-pontine angle tumours'' Neurol India 1981</ref> | ||
Revision as of 18:31, 19 January 2009
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Overview
Myokmia is an involuntary and continuous Myoclonus (muscle twitch) that affects the muscles of the face, particularly the eyelids, as a result of the random firing of neurons leading into the muscle fibres.
Differential diagnosis of causes of myokmia
It is mainly caused by a lack of sleep, or increased intake of nicotine, caffeine, or by stress. However, Myokmia can also or rare occasions be a pathognomonic symptom of lesions on the brain stem, multiple sclerosis or pontine glioma.[1]
However, these causes are extremely rare, with only 2 out of 132 cases of Myokmia diagnosed at Seth G.s. Medical College in Bombay being caused by such lesions.[2]
References
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