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Brain death is the permanent, irreversible, and complete loss of brain function, which may include cessation of involuntary activity necessary to sustain life. [1] [2 ...
Brain injury (BI) is the destruction or degeneration of brain cells.Brain injuries occur due to a wide range of internal and external factors. In general, brain damage refers to significant, undiscriminating trauma-induced damage.
Micrograph showing a colorectal carcinoma metastasis to the cerebellum. HPS stain.. A brain metastasis is a cancer that has metastasized (spread) to the brain from another location in the body and is therefore considered a secondary brain tumor.
Stroke is a medical condition in which poor blood flow to a part of the brain causes cell death. [5] There are two main types of stroke: ischemic, due to lack of blood flow, and hemorrhagic, due to bleeding. [5]
The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between the circulatory system and the central nervous system, thus protecting the brain from harmful or unwanted substances in the blood. [1]
Decompression sickness (DCS; also called divers' disease, the bends, aerobullosis, and caisson disease) is a medical condition caused by dissolved gases emerging from solution as bubbles inside the body tissues during decompression.
Rabies is a viral disease that causes encephalitis in humans and other mammals. [1] It was historically referred to as hydrophobia ("fear of water") because its victims panic when offered liquids to drink.
A mental disorder, also referred to as a mental illness, [6] a mental health condition, [7] or a psychiatric disability, [2] is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. [8]