A neurological condition, Acquired Brain Injury (or simply ABI) is damage to the brain after birth. It usually affects cognitive, physical, emotional or independent functioning and can be as a result of accidents, stroke, brain tumours, infection, poisoning, lack of oxygen or substance abuse. Most definitions of Acquired Brain Injury exclude degenerative neurological disorders. Neurology is the branch of medicine dealing with the nervous system and its disorders. ... Look up Cognition in Wiktionary, the free dictionary The term cognition is used in several different loosely related ways. ... Etymologically, the word emotion is a composite formed from two Latin words. ... An accident is something going wrong unexpectedly. ... A stroke or cerebrovascular accident (CVA) occurs when the blood supply to a part of the brain is suddenly interrupted by occlusion (an ischemic stroke- approximately 90%of strokes) or by hemorrhage (a hemorrhagic stroke - approximately 10% of strokes). ... A brain tumor is any intracranial mass created by an abnormal and uncontrolled growth of cells either normally found in the brain itself: neurons, glial cells (astrocytes, oligodendrocytes, ependymal cells), lymphatic tissue, blood vessels), in the cranial nerves (myelin producing cells Schwann cells), in the brain envelopes (meninges), skull, pituitary... An infection is the detrimental colonization of a host organism by a foreign species. ... The skull and crossbones symbol traditionally used to label a poisonous substance. ... Substance abuse has a range of definitions related to the overindulgence in and dependence on stimulants, depressants, or other chemical substances which leads to effects that are detrimental to the individuals physical or mental health, or the welfare of others. ... Neurodegenerative disease is a condition which affects the brain function. ...