Glossary C
Glossary C
Circadian rhythm refers to an internal biological clock that runs approximately on a 24 hour cycle.
Circadian rhythm sleep disorder refers to a sleep disturbance resulting in sleepiness or insomnia, caused by the body’s inability to synchronize its sleep patterns with the current pattern of day and night.
Circannual rhythm refers to an internal biological clock that runs on a yearly cycle.
Circle of Willis refers to a spiderlike arterial structure formed by the anterior cerebral branches of the internal carotid artery and its connections, the anterior communicating artery, the posterior communicating artery, and the posterior cerebral branches of the basilar artery. It allows for a certain degree of redundancy among blood vessels and blood supply to the various areas of the brain.
Circular questioning refers to an interviewing technique designed to elicit differences in perceptions about events or relationships from different family members.