Nictitating spasm
Nictitating spasm (blepharospasmus; Greek blepharon – an eyelid + Greek spasmos – a spasm) – reduction (spasm) of a century part of a circular muscle of an eye.
Types of a nictitating spasm:
- Hysterical (hystericus) – suddenly coming, without the visible external reason and also suddenly stopping, essential bilateral blepharitis which is noted at hysteria;
- Clonic (clonicus; synonym: блефаротик) – expressed involuntary frequent blinkings, in many cases observed in combination with spasms of other face muscles;
- Reflex (reflectorius) – caused by irritation of branches of a trifacial;
- Symptomatic (symptomaticus) – the appearing at various injuries and diseases of an eye, nasopharynx, adnexal bosoms of a nose, bodies of an oral cavity, and also at defeat of a facial nerve and other diseases of a nervous system, tonic blepharitis;
- Senile (senilis) – the caused changes happening with age in the neuromuscular device the century appearing at advanced age an essential blepharitis;
- Tonic (tonicus) – the century which is expressed a spastic involuntary resistant smykaniye, can proceed from several minutes to many days;
- Essential (essentialis) – the tonic nictitating spasm forming because of age changes or psychogenic frustration in the form of an independent disease.
Average life expectancy of lefthanders is less, than right-handed persons.
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