risus sardonicus

risus /ri·sus/ (ri´sus) [L.] laughter.

risus sardo´nicus a grinning expression produced by spasm of facial muscles.

risus sardonicus

[särdon′ikəs]

Etymology: L, laughter; Gk, sardonius, mocking

a wry masklike grin caused by spasm of the facial muscles, as seen in tetanus.

Risus Sardonicus

A fixed ‘sarcastic’ grimace and anxious expression with drawing up of the eyebrows and corners of the mouth due to spasms of the masseter and other facial muscles, accompanied by rigidity of neck and trunk muscles and arching of back; the RS is seen in generalised tetanus, and caused by a neurotoxin produced by Clostridium tetani, a soil contaminant with a 7–10 day incubation
Prognosis Up to 90% mortality in the unvaccinated and/or susceptible population—e.g., narcotic addicts

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.

risus sardonicus

A fixed 'sarcastic' grimace and anxious expression with drawing up of the eyebrows and corners of the mouth due to spasms of the masseter and other facial muscles, accompanied by rigidity of neck and trunk muscles and arching of back; the RS is seen in generalized tetanus, and caused by a neurotoxin produced by Clostridium tetani, a soil contaminant with a 7-10 day incubation Prognosis Up to 90% mortality in the unvaccinated/susceptible–eg, narcotic addicts

Mentioned in	?		References in periodicals archive	?		Medical browser	?		Full browser	?
idiopathic tetanus risus strychnine tetanus tetanus antitoxin tetanus toxin tetanus toxoid	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). A case of Wilson disease presenting with dysarthria/Konusma bozuklugu ... by Vurucu, Sebahattin; Sari, Oktay; Kocaoglu, Murat; Unay, Bulent; Akin, Ridvan / The Journal of Current Pediatrics 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. A History of Strychnine by Whittington-Egan, Richard / Contemporary Review 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. 5 vaccines you need to know by Spinelli, Frank / The Advocate (The national gay & lesbian newsmagazine)	risk control: sun exposure risk control: tobacco use risk control: unintended pregnancy risk control: visual impairment risk detection risk factor risk factors risk identification risk identification: childbearing family risk identification: genetic risk management risk pool Risk Reduction Surgery risk stratification risk-benefit analysis Risolid risorius risorius muscle Risperdal risperidone Risser cast RIST ristocetin risus risus caninus risus sardonicus RIT RITA Ritalin rite of passage Ritgen maneuver ritodrine ritodrine hydrochloride ritonavir Ritter's disease ritual ritual circumcision ritucharya Rituxan rituximab Rival rivalry Rivanol precipitation test rivastigmine rivastigmine tartrate Rivea corymbosa river blindness river buttercup river poison River Surfing riverine tsetse	rissoles Rissoto RISSP RISST Rist Rist Rist RISTA RISTA II RISTC Ristic, Jovan Ristich, Jovan Risto Heikki Ryti Risto Ryti Ristocetin ristocetin cofactor ristocetin cofactor ristocetin cofactor Ristocetin-induced platelet aggregation Ristori, Adelaide ristra ristra Risu RISUG Risultato finale Risus Risus risus caninus Risus Companion risus sardonicus RISV RISW RISWC RIT RIT RIT RIT RIT&E rit. Rita Rita Rita Hayworth RITA HUMS Rita in Hinduism Rita in Hinduism Rita Levi-Montalcini Rita Platzer Public Relations Rita Ranch Neighborhood Association Rita Welsh Adult Literacy Program RITA-2 RITAG Ritaja Ritalin Ritalin Ritalin Ritalin la Ritalin la Ritalin Reading Room Ritalin-sr Ritalin-sr

Mentioned in

References in periodicals archive

Medical browser

Full browser

idiopathic tetanus
risus
strychnine
tetanus
tetanus antitoxin
tetanus toxin
tetanus toxoid

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).

A case of Wilson disease presenting with dysarthria/Konusma bozuklugu ... by Vurucu, Sebahattin; Sari, Oktay; Kocaoglu, Murat; Unay, Bulent; Akin, Ridvan / The Journal of Current Pediatrics

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.

A History of Strychnine by Whittington-Egan, Richard / Contemporary Review

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.

5 vaccines you need to know by Spinelli, Frank / The Advocate (The national gay & lesbian newsmagazine)