Death is the irreversible cessation of all biological functions that sustain an organism. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including brainstem, and brain death is sometimes used as a legal definition of death. The remains of a former organism normally begin to decompose shortly after death.

A near-death experience (NDE) is a profound personal experience associated with death or impending death which researchers claim share similar characteristics.When positive, such experiences may encompass a variety of sensations including detachment from the body, feelings of levitation, total serenity, security, warmth, the experience of absolute dissolution, and the …

Clinical trials are prospective biomedical or behavioral research studies on human participants designed to answer specific questions about biomedical or behavioral interventions, including new treatments (such as novel vaccines, drugs, dietary choices, dietary supplements, and medical devices) and known interventions that warrant further study and comparison.

Clinical chemistry (also known as chemical pathology, clinical biochemistry or medical biochemistry) is the area of chemistry that is generally concerned with analysis of bodily fluids for diagnostic and therapeutic purposes. It is an applied form of biochemistry (not to be confused with medicinal chemistry, which involves basic research for drug development).

The International Classification of Diseases (ICD) is a globally used diagnostic tool for epidemiology, health management and clinical purposes. The ICD is maintained by the World Health Organization (WHO), which is the directing and coordinating authority for health within the United Nations System. The ICD is originally designed as a health care classification system, …

The five stages of grief model (or the Kübler-Ross model) is popularly known as a model that describes a series of emotions experienced by people who are grieving: denial, anger, bargaining, depression and acceptance.In actuality, the Kübler-Ross model was based on people who are dying rather than grieving. Although commonly referenced in popular culture, studies have not …

Clinical death, the cessation of blood circulation and breathing; Clinical formulation, a theoretically-based explanation of information obtained from clinical assessment; Clinical governance, a systematic approach to maintaining and improving the quality of patient care; Clinical linguistics, linguistics applied to speech-language pathology

Physical examination has been described as a ritual that plays a significant role in the doctor-patient relationship that will provide benefits in other medical encounters. When a physical exam is expected by the patient but is not performed by the provider, patients may express concern for the lack of depth of investigation into their illness, the validity of treatment plans and exclusions ...

Signs and symptoms are the observed or detectable signs, and experienced symptoms of an illness, injury, or condition.A sign for example may be a higher or lower temperature than normal, raised or lowered blood pressure or an abnormality showing on a medical scan.A symptom is something out of the ordinary that is experienced by an individual such as feeling feverish, a …

Pathophysiology. Death may result from several pathologies that deviate from benign laughter. Infarction of the pons and the medulla oblongata in the brain may cause the pseudobulbar affect. Asphyxiation caused by laughter leads the body to shut down from the lack of oxygen.. Laughter can cause atonia and collapse ("agelastic syncope"), which in turn can cause trauma.