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risus

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risus /ri·sus/ (ri´sus) [L.] laughter.
risus sardo´nicus  a grinning expression produced by spasm of facial muscles.

risus [ri´sus] (L.)
laughter.
risus sardo´nicus a grinning expression produced by spasm of the facial muscles; seen in tetanus and certain types of poisoning.

risus
[L.] laughter.

risus sardonicus
a grinning expression produced by spasm of the facial muscles, typical of tetanus in humans. The term is also applied to dogs with tetanus in which the lips are drawn back by muscle spasms.


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Ayrica basvuru sirasindaki norolojik inceleme bulgulan siklik sirasina gore dizartri (%91), yuruyus bozuklugu (%75), risus sardonicus (%72), distoni (%69), rijidite (%66), tremor (%60), disfaji (%50), korea (%16), atetoz (%14) ve nadir olarak da nobetler ve piramidal bulgular olarak bildirilmistir (5).
This pattern may be repeated several times, bringing about a tetanic spasm in which the chest is fixed, the neck stiffens, the face twists into a curious grin, the so-called risus sardonicus, and death brings the suffering to an end.
The impact on the facial muscles produces a particular characteristic feature called risus sardonicus, or "sardonic grin," in which the angles of the mouth are drawn down, exposing taught clenched teeth.
 
 
 
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