| MMR | mass miniature radiography; masseter muscle rigidity; maternal mortality rate; measles-mumps-rubella... |
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| catatonic rigidity | Rigidity associated with catatonic psychotic states in which all muscles exhibit flexibilitas cerea. (05 Mar 2000) |
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| catatonic | <neurology, psychiatry> A phase of schizophrenia where the patient is unresponsive. The tendency to assume a fixed posture and inability to move or talk are characteristic of this phase. (16 Mar 1998) |
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| catatonic dementia | Dementia with catatonic symptoms. (05 Mar 2000) |
| catatonic excitement | An excited catatonic state seen in one of the schizophrenic disorders. See: catatonia. (05 Mar 2000) |
| catatonic pupil | Transient pupillary dilation with absence of pupillary reaction to light and convergence. (05 Mar 2000) |
| catatonic schizophrenia | Schizophrenia characterised by marked disturbance, which may involve stupor, negativism, rigidity, excitement, or posturing; sometimes there is rapid alteration between the extremes of excitement and stupor. Associated features include stereotypic behaviour, mannerisms, and waxy flexibility; mutism is particularly common. (05 Mar 2000) |
| catatonic stupor | Stupor associated with catatonia. (05 Mar 2000) |
| schizophrenia, catatonic | A type of schizophrenia characterised by abnormality of motor behaviour which may involve particular forms of stupor, rigidity, excitement or inappropriate posture. (12 Dec 1998) |
| cadaveric rigidity | Muscular rigidity which develops in the cadaver usually from 4 to 10 hours after death and lasts 3 or 4 days. (12 Dec 1998) |
| pathologic rigidity | Rigidity of the cervix uteri in labour, due to fibrosis, scarring, cancer, or other condition. (05 Mar 2000) |
| cerebellar rigidity | Increased tone of the extensor muscles, related to injury of the vermis of the cerebellum. (05 Mar 2000) |
| rigidity | Stiffness or inflexibility, chiefly that which is abnormal or morbid, rigor. Origin: L. Rigiditas, rigidus = stiff (18 Nov 1997) |
| clasp-knife rigidity | Initial increased resistance to stretch of the extensor muscles of a joint that give way rather suddenly allowing the joint then to be easily flexed; the rigidity is due to an exaggeration of the stretch reflex. See: lengthening reaction. Synonym: clasp-knife effect, clasp-knife rigidity. (05 Mar 2000) |
| cogwheel rigidity | <clinical sign, neurology> A type of rigidity seen in parkinsonism in which the muscles respond with cogwheel-like jerks to the use of constant force in bending the limb. (21 Jun 2000) |
| muscle rigidity | Continuous tonic contraction of skeletal muscle. (12 Dec 1998) |
| postmortem rigidity | Muscular rigidity which develops in the cadaver usually from 4 to 10 hours after death and lasts 3 or 4 days. (12 Dec 1998) |
| catatonic rigidity |
maintenance of a rigid posture in spite of attempts to be moved, characteristic of catatonic schizophrenia.
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