There is currently no single diagnostic test for CJD. When CJD is suspected, the first concern is to rule out treatable forms of dementia such as encephalitis (inflammation of the brain) or chronic meningitis. A neurological examination and spinal tap are often performed to rule out more common causes of dementia. An electroencephalogram (EEG) to record the brain’s electrical pattern can be particularly valuable because it shows a specific type of abnormality in CJD. Computerized tomography (CT) of the brain can help rule out the possibility that the symptoms result from other problems such as stroke or a brain tumor. Magnetic resonance imaging (MRI) brain scans also can reveal characteristic patterns of brain degeneration that can help diagnose CJD.
- Crib death
Crib death: The sudden and unexpected death of a baby with no known illness, typically affecting infants from 2 weeks to 6 months of age while sleeping. Crib death is now called Sudden Infant Death Syndrome (SIDS). Babies at an increased risk for SIDS include those with a brother or sister who died of SIDS; […]
Crick: 1. A painful sudden spasmodic stiffness in the muscles of the neck or back. 2. Francis Crick who, with James Watson, devised the Watson-Crick model of DNA as a double helix. See: Crick, Francis.
- Crick, Francis
Crick, Francis: British biologist (1916-2004) who shared the 1962 Nobel prize in Medicine and Physiology with James Watson and Maurice Wilkins for “discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material.” The discovery of the structure of DNA as a double helix by Watson and Crick (with […]
- Crick-Brenner experiment
Crick-Brenner experiment: An elegant and important experiment performed in 1961 by Francis Crick and Sydney Brenner. The experiment proved that the genetic code was a triplet code and that the triplets were not separted by “punctuation.” Crick and Brenner demonstrated that a triplet of bases in the DNA determines an amino acid unit and a […]
- Crime scene investigation
Crime scene investigation: The use of physical evidence at the scene of the crime and the use of deductive and inductive reasoning to gain knowledge of the events surrounding the crime. Crime scene investigation is multidisciplinary and involves a systematic search of the crime scene; meticulous observation and documentation of the scene; photography and sketching […]