Brain: The portion of the central nervous system that is located within the skull. It functions as a primary receiver, organizer, and distributor of information for the body. It has a right half and a left half, each of which is called a hemisphere.
- Brain aneurysm
An aneurysm of a blood vessel in the brain, usually due to a defect in the vessel at birth or from high blood pressure. Rupture of the aneurysm causes a sudden severe headache, often with nausea, vomiting, decreased consciousness, and can be life threatening.
- Brain anthrax
Brain anthrax: Anthrax infection of the central nervous system (the spinal cord and brain) and meninges (the membranes covering the brain and spinal cord. These microscopic findings come from a fatal case of anthrax that occurred in California in 1976. The details of this case have been described in a medical journal called Human Pathology […]
- Brain biopsy
Brain biopsy: Biopsy of the brain. Removal of a small piece of tissue from the brain for diagnostic purposes. One way the procedure may be done is by stereotactic needle biopsy in which the spot to be biopsied is located three-dimensionally, the information is entered into a computer, and the computer calculates the information and […]
- Brain cancer
Cancer of the central information processing center of the body. Tumors in the brain can be malignant or benign, and can occur at any age. Only malignant tumors are cancerous. Primary brain tumors cancer initially forms in the brain tissue. Secondary brain tumors cancers are cancers that have spread to the brain tissue (metastasized) from […]
- Brain freeze
Brain freeze: A headache that occurs when one puts ice, a cold food, or a chilled beverage in the mouth, chilling the roof of the mouth. Ice cream is by far the most frequent offender. Brain freeze is characterized by a stabbing, aching pain that begins a few seconds after ingestion of something cold. The […]