Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
crisis[kri´sis] (pl. cri´ses) (L.)
1. the turning point of a disease for better or worse; especially a sudden change, usually for the better, in the course of an acute disease.
2. a sudden paroxysmal intensification of symptoms in the course of a disease.
3. life crisis.
addisonian crisis (adrenal crisis) the symptoms accompanying an acute onset or worsening of addison's disease: anorexia, vomiting, abdominal pain, apathy, confusion, extreme weakness, and hypotension; if untreated these progress to shock and then death.
aplastic crisis a sickle cell crisis in which there is temporary bone marrow aplasia.
blast crisis a sudden, severe change in the course of chronic granulocytic leukemia, characterized by an increased number of blasts, i.e., myeloblasts or lymphoblasts.
catathymic crisis an isolated, nonrepetitive act of violence that develops as a result of intolerable tension.
celiac crisis an attack of severe watery diarrhea and vomiting producing dehydration and acidosis, sometimes occurring in infants with celiac disease.
developmental crisis maturational crisis.
hemolytic crisis an uncommon sickle cell crisis in which there is acute red blood cell destruction with jaundice.
hypertensive crisis dangerously high blood pressure of acute onset.
identity crisis a period in the psychosocial development of an individual, usually occurring during adolescence, manifested by a loss of the sense of the sameness and historical continuity of one's self, confusion over values, or an inability to accept the role the individual perceives as being expected by society.
life crisis a period of disorganization that occurs when a person meets an obstacle to an important life goal, such as the sudden death of a family member, a difficult family conflict, an incident of domestic violence (spouse or child abuse), a serious accident, loss of a limb, loss of a job, or rape or attempted rape.
maturational crisis a life crisis in which usual coping mechanisms are inadequate in dealing with a stress common to a particular stage in the life cycle or with stress caused by a transition from one stage to another. Called also developmental crisis.
myasthenic crisis the sudden development of dyspnea requiring respiratory support in myasthenia gravis; the crisis is usually transient, lasting several days, and accompanied by fever.
oculogyric crisis a symptom of an acute dystonic reaction in which the person demonstrates a fixed gaze, usually upward; also, the uncontrollable rolling upwards of the eye. It can be a result of encephalitis or a reaction to antipsychotic medications.
salt-losing crisis see salt-losing crisis.
sickle cell crisis see sickle cell crisis.
tabetic crisis a painful paroxysm occurring in tabes dorsalis.
thyroid crisis (thyrotoxic crisis) see thyroid crisis.
vaso-occlusive crisis a sickle cell crisis in which there is severe pain due to infarctions in the bones, joints, lungs, liver, spleen, kidney, eye, or central nervous system.
A spasmodic movement of the eyeballs into a fixed position, usually upward, that persists for several minutes or hours.
Etymology: L, oculus + gyrare, to turn around
a paroxysm in which the eyes are held in a fixed position, usually up and sideways, for minutes or several hours, often occurring in postencephalitic patients with signs of parkinsonism. In some cases the eyes are held down or sideways, and there may be spasm or closing of the lids. Oculogyric crises may be precipitated by emotional stress and neuroleptic overdose, and patients with the disorder frequently show psychiatric symptoms.
oculogyric crisisA sustained, fixed, maximal turning of the eyes in one direction, usually upwards, that persists for periods of minutes or hours. The phenomenon is characteristic of the type of PARKINSONISM that follows ENCEPHALITIS or is induced by drugs.
oculogyric crisis (OCG)
Sudden involuntary contractions of some eye muscles resulting in repetitive, conjugate ocular deviations, usually, though not always, in an upward direction. The attack or crisis may last from seconds to minutes. It occurs most frequently after the use of neuroleptic medication, but it may be precipitated or accompany, emotional stress, alcohol or general fatigue.