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Glossary E-H

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Electroencephalograph, or EEG – A test that measures electrical activity of the brain that is recorded from electrodes placed on the scalp.

Epidural Hematoma – Bleeding into the area between the skull and the dura mater.

Euphoria – An exaggerated or abnormal sense of well-being not based on reality.

Executive Functions – The ability to formulate and carry out plans effectively. These functions are essential for independent, creative and socially constructive behavior.

Expressive Aphasia – also known as Broca’s aphasia. A difficulty in expressing oneself in speech and writing. Characterized by knowing what one wants to say but being unable to find the words to say what is being thought. There is lack of spontaneous speech, words are often labored over and sentences are short and incomplete.

Focal Brain Injury – Damage confined to a small area of the brain. The focal damage is most often at the point where the head hits an object or where an object, such as a bullet, enters the brain.

Frontal Lobe – The front part of the brain; involved in planning, organizing, problem solving, selective attention, personality and a variety of "higher cognitive functions."

Generalized Tonic-Clonic Seizures – A seizure involving the entire body. It is also called a grand mal seizure. Such seizures usually involve muscle rigidity, violent muscle contractions, and loss of consciousness.

Glasgow Coma Scale – A scale used for measuring level of consciousness. Scoring is determined by three factors: eye opening ability, verbal responsiveness, and motor responsiveness. The scores range from lowest level of responsiveness a 3 to highest level of responsiveness a 15.

Hematoma – A collection of blood caused by the rupture or tearing of blood vessels.

Herniation/Herniated –Compression of brain tissue caused by high pressure inside the skull that can lead to death if not aggressively treated.

Hypertension – The medical term for high blood pressure.

Hypotension – The medical term for low blood pressure.

Hypoxia – Decreased oxygen levels in an organ, such as the brain.