A profound state of unconsciousness associated with depressed cerebral activity from which the individual cannot be aroused. Coma generally occurs when there is dysfunction or injury involving both cerebral hemispheres or the brain stem RETICULAR FORMATION.
Relatively complete absence of oxygen in one or more tissues.
Neoplasms of the intracranial components of the central nervous system, including the cerebral hemispheres, basal ganglia, hypothalamus, thalamus, brain stem, and cerebellum. Brain neoplasms are subdivided into primary (originating from brain tissue) and secondary (i.e., metastatic) forms. Primary neoplasms are subdivided into benign and malignant forms. In general, brain tumors may also be classified by age of onset, histologic type, or presenting location in the brain.
Unexpected rapid natural death due to cardiovascular collapse within one hour of initial symptoms. It is usually caused by the worsening of existing heart diseases. The sudden onset of symptoms, such as CHEST PAIN and CARDIAC ARRHYTHMIAS, particularly VENTRICULAR TACHYCARDIA, can lead to the loss of consciousness and cardiac arrest followed by biological death. (from Braunwald's Heart Disease: A Textbook of Cardiovascular Medicine, 7th ed., 2005)
Sense of awareness of self and of the environment.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
Organic mental disorders in which there is impairment of the ability to maintain awareness of self and environment and to respond to environmental stimuli. Dysfunction of the cerebral hemispheres or brain stem RETICULAR FORMATION may result in this condition.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
A great expanse of continuous bodies of salt water which together cover more than 70 percent of the earth's surface. Seas may be partially or entirely enclosed by land, and are smaller than the five oceans (Atlantic, Pacific, Indian, Arctic, and Antarctic).
NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.
The terms, expressions, designations, or symbols used in a particular science, discipline, or specialized subject area.
A plant species of the family VISCACEAE, order Santalales, subclass Rosidae. This is the traditional mistletoe of literature and Christmas. Members contain viscotoxin (5 kDa basic polypeptides related to thionins), beta-galactoside- and N-acetyl-D-galactosamine-specific lectin II (60 kDa), and polysaccharides. Mistletoe lectin I is a type 2 ribosome-inactivating protein. Commercial extracts include Plenosol, Eurixor, Helixor Isorel, Iscador, and NSC 635089 (ANTINEOPLASTIC AGENTS, PHYTOGENIC).
An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.
A plant species in the CHENOPODIUM genus known for edible greens.
A species of CARDIOVIRUS which contains three strains: Theiler's murine encephalomyelitis virus, Vilyuisk human encephalomyelitis virus, and Rat encephalomyelitis virus.
The functions and activities carried out by the U.S. Postal Service, foreign postal services, and private postal services such as Federal Express.
The science devoted to the comparative study of man.
Using an INTERNET based personal journal which may consist of reflections, comments, and often hyperlinks.
The comparative science dealing with the physical characteristics of humans as related to their origin, evolution, and development in the total environment.
Field of social science that is concerned with differences between human groups as related to health status and beliefs.
It is the study of social phenomena which characterize the learned, shared, and transmitted social activities of particular ethnic groups with focus on the causes, consequences, and complexities of human social and cultural variability.
The branch of psychology concerned with psychological methods of recognizing and treating behavior disorders.
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.
The study of normal and abnormal behavior of children.
The science dealing with the study of mental processes and behavior in man and animals.
Disciplines concerned with the interrelationships of individuals in a social environment including social organizations and institutions. Includes Sociology and Anthropology.